Christian Richter via llvm-dev
2018-Dec-13 12:08 UTC
[llvm-dev] Compiling for baremetal ARMv4 on Ubuntu Linux
Hello Peter and Lists, thanks a lot, that way it worked out! The final cmake was cmake -G "Ninja" ../llvm/projects/compiler-rt/ -DCOMPILER_RT_BUILD_BUILTINS=ON -DCOMPILER_RT_BUILD_SANITIZERS=OFF -DCOMPILER_RT_BUILD_XRAY=OFF -DCOMPILER_RT_BUILD_LIBFUZZER=OFF -DCOMPILER_RT_BUILD_PROFILE=OFF -DCMAKE_C_COMPILER=/usr/local/myclang/bin/clang -DCMAKE_AR=/usr/local/myclang/bin/llvm-ar -DCMAKE_NM=/usr/local/myclang/bin/llvm-nm -DCMAKE_RANLIB=/usr/local/myclang/bin/llvm-ranlib -DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY -DCMAKE_C_COMPILER_TARGET="arm-linux-gnueabihf" -DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON -DLLVM_CONFIG_PATH=/usr/local/myclang/bin/llvm-config -DCMAKE_ASM_FLAGS="--target=arm-linux-gnueabihf -march=armv7a --gcc-toolchain=/home/crichter/arm-linux-gnueabihf/gcc-arm --sysroot=/home/crichter/arm-linux-gnueabihf/sysroot-glibc/" -DCMAKE_C_FLAGS="--target=arm-linux-gnueabihf -march=armv7a --gcc-toolchain=/home/crichter/arm-linux-gnueabihf/gcc-arm --sysroot=/home/crichter/arm-linux-gnueabihf/sysroot-glibc/" where sysroot-glibc/ contains sysroot-glibc-8.2-x86_64 and /arm-linux-gnueabihf/gcc-arm contains gcc-arm-8.2 for Aarch32 hard float from https://developer.arm.com/open-source/gnu-toolchain/gnu-a/downloads. This resulted in successfully building libclang_rt.builtins-armhf.a So next, I tried to use the cmake recipe for BaremetalARM as in the documentation. Therefore, I moved the compiler-rt directory from llvm/projects to llvm/runtimes. I downloaded the latest updates of gcc-arm-none-eabi6/7/8 from https://developer.arm.com/open-source/gnu-toolchain/gnu-rm/downloads and tried to build in a new directory. But whether I gave the -C the path to BaremetalARM.cmake's directory or the file itself, nothing started. I was unsure whether to keep the paths to llvm-ar, llvm-nm and so on as well and whether or not to give the new compiler-rt-directory or the whole llvm-directory as a starting point. Am I using the wrong build directory here? Is this still "Ninja"? The error message (see below) is true: /home/llvm_4rt/llvm/tools/clang/cmake/caches contains no CMakeLists.txt, just the BaremetalARM.cmake among other recipes. Giving -C the file directly just leads to a "this is a file, not a directory" error. This is (one of my) cmake commands: root at christian-forschung-virtual-machine:/home/llvm_4rt/buildrecipe# cmake -G "Ninja" ../llvm/runtimes/compiler-rt -DCOMPILER_RT_BUILD_BUILTINS=ON -DCOMPILER_RT_BUILD_SANITIZERS=OFF -DCOMPILER_RT_BUILD_XRAY=OFF -DCOMPILER_RT_BUILD_LIBFUZZER=OFF -DCOMPILER_RT_BUILD_PROFILE=OFF -DCMAKE_C_COMPILER=/usr/local/myclang/bin/clang -DCMAKE_AR=/usr/local/myclang/bin/llvm-ar -DCMAKE_NM=/usr/local/myclang/bin/llvm-nm -DCMAKE_RANLIB=/usr/local/myclang/bin/llvm-ranlib -DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY -DCMAKE_C_COMPILER_TARGET="arm-linux-gnueabihf" -DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON -DLLVM_CONFIG_PATH=/usr/local/myclang/bin/llvm-config -DBAREMETAL_ARMV5M_SYSROOT=/home/crichter/Downloads/gcc-arm-none-eabi-5_4-2016q3 -DBAREMETAL_ARMV6M_SYSROOT=/home/crichter/Downloads/gcc-arm-none-eabi-6-2017-q2-update -DBAREMETAL_ARMV7M_SYSROOT=/home/crichter/Downloads/gcc-arm-none-eabi-7-2018-q2-update -C /home/llvm_4rt/llvm/tools/clang/cmake/caches loading initial cache file /home/llvm_4rt/llvm/tools/clang/cmake/caches CMake Error: Error processing file: /home/llvm_4rt/llvm/tools/clang/cmake/caches CMake Error: The source directory "/home/llvm_4rt/llvm/tools/clang/cmake/caches" does not appear to contain CMakeLists.txt. Specify --help for usage, or press the help button on the CMake GUI. So I'm obviously using it wrong, would appreciate any pointers in the right direction! Christian On 10.12.2018 17:59, Peter Smith wrote:> Hello Christian, > > Yes it does look like clang will add /usr/local/include unless > --nostdinc is used, although that will mean skipping a lot of other > include directories that clang will implicitly add based on the > target. I can think of a couple of ways to proceed: > 1.) use -nostdinc and add in the directories you need manually > 2.) use a cross gcc toolchain in a different directory such as one > from (https://developer.arm.com/open-source/gnu-toolchain/gnu-a/downloads) > and use --gcc-toolchain and --sysroot. > > I must admit I've only ever done 2.) myself as I've wanted to make > sure I've not inadvertently depended on something on my machine. > > Apologies for the confusion. > > Peter > > On Mon, 10 Dec 2018 at 16:05, Christian Richter > <christian.richter at hsu-hh.de> wrote: >> Hello again! >> >> Tried out the small Hello World Setup, worked as intended: >> >> root at christian-forschung-virtual-machine:/home/progs# clang -v --target=arm-linux-gnueabihf hello.c -o hello -fuse-ld=lld >> clang version 8.0.0 (https://git.llvm.org/git/clang.git/ a152c7a4b7ba8f4cb9532ead9a38a7121db43d50) (https://git.llvm.org/git/llvm.git/ 1959ce6f3e01241919968ac1911fd45660239d23) >> Target: arm-unknown-linux-gnueabihf >> Thread model: posix >> InstalledDir: /usr/local/myclang/bin >> Found candidate GCC installation: /usr/lib/gcc-cross/arm-linux-gnueabihf/7 >> Found candidate GCC installation: /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0 >> Selected GCC installation: /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0 >> Candidate multilib: .;@m32 >> Selected multilib: .;@m32 >> "/usr/local/myclang/bin/clang-8" -cc1 -triple armv6kz-unknown-linux-gnueabihf -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -discard-value-names -main-file-name hello.c -mrelocation-model static -mthread-model posix -mdisable-fp-elim -fmath-errno -masm-verbose -mconstructor-aliases -fuse-init-array -target-cpu arm1176jzf-s -target-feature +strict-align -target-abi aapcs-linux -mfloat-abi hard -fallow-half-arguments-and-returns -dwarf-column-info -debugger-tuning=gdb -v -resource-dir /usr/local/myclang/lib/clang/8.0.0 -internal-isystem /usr/local/include -internal-isystem /usr/local/myclang/lib/clang/8.0.0/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdebug-compilation-dir /home/progs -ferror-limit 19 -fmessage-length 202 -fno-signed-char -fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-diagnostics -o /tmp/hello-98a3a7.o -x c hello.c -faddrsig >> clang -cc1 version 8.0.0 based upon LLVM 8.0.0svn default target x86_64-unknown-linux-gnu >> ignoring nonexistent directory "/include" >> #include "..." search starts here: >> #include <...> search starts here: >> /usr/local/include >> /usr/local/myclang/lib/clang/8.0.0/include >> /usr/include >> End of search list. >> "/usr/local/myclang/bin/ld.lld" -EL -z relro -X --hash-style=gnu --eh-frame-hdr -m armelf_linux_eabi -dynamic-linker /lib/ld-linux-armhf.so.3 -o hello /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib/../lib/crt1.o /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib/../lib/crti.o /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/crtbegin.o -L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0 -L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib/../lib -L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../lib -L/usr/local/myclang/bin/../lib -L/lib/../lib -L/usr/lib/../lib -L/usr/lib/arm-linux-gnueabihf/../../lib -L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib -L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../.. -L/usr/local/myclang/bin/../lib -L/lib -L/usr/lib /tmp/hello-98a3a7.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/crtend.o /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib/../lib/crtn.o >> >> root at christian-forschung-virtual-machine:/home/progs# qemu-arm -L /usr/arm-linux-gnueabihf hello >> >> Hello, World! >> >> So far, so good. The Paths written more readable seem to be >> >> /usr/local/myclang/lib, /lib, /usr/lib, /usr/arm-linux-gnueabihf/lib, so no surprised there. >> >> Then I added the suggested -DCMAKE_ASM_FLAGS to the cmake for the standalone compiler-rt build while leaving out the --sysroot and --gcc-toolchain: >> >> cmake -G "Ninja" ../llvm/projects/compiler-rt/ -DCOMPILER_RT_BUILD_BUILTINS=ON -DCOMPILER_RT_BUILD_SANITIZERS=OFF -DCOMPILER_RT_BUILD_XRAY=OFF -DCOMPILER_RT_BUILD_LIBFUZZER=OFF -DCOMPILER_RT_BUILD_PROFILE=OFF -DCMAKE_C_COMPILER=/usr/local/myclang/bin/clang -DCMAKE_AR=/usr/local/myclang/bin/llvm-ar -DCMAKE_NM=/usr/local/myclang/bin/llvm-nm -DCMAKE_RANLIB=/usr/local/myclang/bin/llvm-ranlib -DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY -DCMAKE_C_COMPILER_TARGET="arm-linux-gnueabihf" -DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON -DLLVM_CONFIG_PATH=/usr/local/myclang/bin/llvm-config -DCMAKE_ASM_FLAGS="--target=arm-linux-gnueabihf -march=armv7a" -DCMAKE_C_FLAGS="--target=arm-linux-gnueabihf -march=armv7a" >> >> now "ninja builtins" at least starts working, but fails after a while (see below). The error seems similar to http://lists.llvm.org/pipermail/llvm-dev/2011-September/043289.html to me, so it might still be some variant of the problem from before: Using a x86-header where an ARM one would be needed. >> >> The ninja builtins output: >> >> root at christian-forschung-virtual-machine:/home/llvm_all/buildrtonly# ninja builtins >> [147/207] Building C object lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/emutls.c.o >> FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/emutls.c.o >> /usr/local/myclang/bin/clang --target=arm-linux-gnueabihf -DVISIBILITY_HIDDEN --target=arm-linux-gnueabihf -march=armv7a -Wall -Wno-unused-parameter -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILER_RT_ARMHF_TARGET -MD -MT lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/emutls.c.o -MF lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/emutls.c.o.d -o lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/emutls.c.o -c /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/emutls.c >> In file included from /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/emutls.c:41: >> /usr/include/pthread.h:682:6: error: 'regparm' is not valid on this platform >> __cleanup_fct_attribute; >> ^~~~~~~~~~~~~~~~~~~~~~~ >> /usr/include/bits/pthreadtypes-arch.h:103:50: note: expanded from macro '__cleanup_fct_attribute' >> # define __cleanup_fct_attribute __attribute__ ((__regparm__ (1))) >> ^ ~ >> In file included from /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/emutls.c:41: >> /usr/include/pthread.h:694:3: error: 'regparm' is not valid on this platform >> __cleanup_fct_attribute; >> ^~~~~~~~~~~~~~~~~~~~~~~ >> /usr/include/bits/pthreadtypes-arch.h:103:50: note: expanded from macro '__cleanup_fct_attribute' >> # define __cleanup_fct_attribute __attribute__ ((__regparm__ (1))) >> ^ ~ >> In file included from /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/emutls.c:41: >> /usr/include/pthread.h:735:6: error: 'regparm' is not valid on this platform >> __cleanup_fct_attribute __attribute__ ((__noreturn__)) >> ^~~~~~~~~~~~~~~~~~~~~~~ >> /usr/include/bits/pthreadtypes-arch.h:103:50: note: expanded from macro '__cleanup_fct_attribute' >> # define __cleanup_fct_attribute __attribute__ ((__regparm__ (1))) >> ^ ~ >> 3 errors generated. >> [148/207] Building C object lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/gcc_personality_v0.c.o >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:148:47: warning: declaration of 'struct _Unwind_Exception' will not be visible outside of this function [-Wvisibility] >> _Unwind_Reason_Code __gnu_unwind_frame(struct _Unwind_Exception *, >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:153:23: warning: declaration of 'struct _Unwind_Exception' will not be visible outside of this function [-Wvisibility] >> continueUnwind(struct _Unwind_Exception *exceptionObject, >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:160:28: warning: incompatible pointer types passing 'struct _Unwind_Exception *' to parameter of type 'struct _Unwind_Exception *' [-Wincompatible-pointer-types] >> if (__gnu_unwind_frame(exceptionObject, context) != _URC_OK) >> ^~~~~~~~~~~~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:148:66: note: passing argument to parameter here >> _Unwind_Reason_Code __gnu_unwind_frame(struct _Unwind_Exception *, >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:184:38: warning: declaration of 'struct _Unwind_Exception' will not be visible outside of this function [-Wvisibility] >> _Unwind_State state, struct _Unwind_Exception *exceptionObject, >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:202:31: warning: incompatible pointer types passing 'struct _Unwind_Exception *' to parameter of type 'struct _Unwind_Exception *' [-Wincompatible-pointer-types] >> return continueUnwind(exceptionObject, context); >> ^~~~~~~~~~~~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:153:42: note: passing argument to parameter 'exceptionObject' here >> continueUnwind(struct _Unwind_Exception *exceptionObject, >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:207:31: warning: incompatible pointer types passing 'struct _Unwind_Exception *' to parameter of type 'struct _Unwind_Exception *' [-Wincompatible-pointer-types] >> return continueUnwind(exceptionObject, context); >> ^~~~~~~~~~~~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:153:42: note: passing argument to parameter 'exceptionObject' here >> continueUnwind(struct _Unwind_Exception *exceptionObject, >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:250:27: warning: incompatible pointer types passing 'struct _Unwind_Exception *' to parameter of type 'struct _Unwind_Exception *' [-Wincompatible-pointer-types] >> return continueUnwind(exceptionObject, context); >> ^~~~~~~~~~~~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:153:42: note: passing argument to parameter 'exceptionObject' here >> continueUnwind(struct _Unwind_Exception *exceptionObject, >> ^ >> 7 warnings generated. >> [152/207] Building ASM object lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/aeabi_cdcmp.S.o >> ninja: build stopped: subcommand failed. >> >> Almost there! Thanks in advance! >> >> Christian >> >> >> >> On 07.12.2018 17:40, Peter Smith wrote: >> >> Hello Christian, >> >> I've put some comments inline >> >> On Fri, 7 Dec 2018 at 15:48, Christian Richter via llvm-dev >> <llvm-dev at lists.llvm.org> wrote: >> >> Hello, >> >> on the problems cross-building compiler-rt: Tried to follow https://llvm.org/docs/HowToCrossCompileBuiltinsOnArm.html which lead to this cmake: >> >> cmake -G "Ninja" ../llvm/projects/compiler-rt/ -DCOMPILER_RT_BUILD_BUILTINS=ON -DCOMPILER_RT_BUILD_SANITIZERS=OFF -DCOMPILER_RT_BUILD_XRAY=OFF -DCOMPILER_RT_BUILD_LIBFUZZER=OFF -DCOMPILER_RT_BUILD_PROFILE=OFF -DCMAKE_C_COMPILER=/usr/local/myclang/bin/clang -DCMAKE_AR=/usr/local/myclang/bin/llvm-ar -DCMAKE_NM=/usr/local/myclang/bin/llvm-nm -DCMAKE_RANLIB=/usr/local/myclang/bin/llvm-ranlib -DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY -DCMAKE_C_COMPILER_TARGET="arm-linux-gnueabihf" -DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON -DLLVM_CONFIG_PATH=/usr/local/myclang/bin/llvm-config -DCMAKE_C_FLAGS="--target=arm-linux-gnueabihf -march=armv7a --gcc-toolchain=/usr/arm-linux-gnueabihf --sysroot=/usr/arm-linux-gnueabihf/lib" >> >> Some small notes: >> >> - Used -DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY instead of -DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld" as Peter Smith suggested because it actually is a library and therefore does not need to be linked. If I do not change that, the cmake does not work (see below). >> >> - used -G "Ninja" although not explicitly stated in the tutorial as they use "ninja builtins" next. >> >> - had to change --march=armv7a to -march=armv7a as clang did not accept the first one. >> >> the cmake was successful, but the ninja builtins was not (see both outputs below). Am I doing the --gcc-toolchain / --sysroot part right? These are just the places where the result of "apt install arm-linux-gnueabihf" lives. >> >> cmake output with -DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld": >> >> Thanks for the comments. I will try and revisit that document next >> week and will post an update. >> >> root at christian-forschung-virtual-machine:/home/llvm_all/buildrtonly# cmake -G "Ninja" ../llvm/projects/compiler-rt/ -DCOMPILER_RT_BUILD_BUILTINS=ON -DCOMPILER_RT_BUILD_SANITIZERS=OFF -DCOMPILER_RT_BUILD_XRAY=OFF -DCOMPILER_RT_BUILD_LIBFUZZER=OFF -DCOMPILER_RT_BUILD_PROFILE=OFF -DCMAKE_C_COMPILER=/usr/local/myclang/bin/clang -DCMAKE_AR=/usr/local/myclang/bin/llvm-ar -DCMAKE_NM=/usr/local/myclang/bin/llvm-nm -DCMAKE_RANLIB=/usr/local/myclang/bin/llvm-ranlib -DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld" -DCMAKE_C_COMPILER_TARGET="arm-linux-gnueabihf" -DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON -DLLVM_CONFIG_PATH=/usr/local/myclang/bin/llvm-config -DCMAKE_C_FLAGS="--target=arm-linux-gnueabihf -march=armv7a --gcc-toolchain=/usr/arm-linux-gnueabihf --sysroot=/usr/arm-linux-gnueabihf/lib" >> -- The C compiler identification is Clang 8.0.0 >> -- The CXX compiler identification is Clang 8.0.0 >> -- The ASM compiler identification is unknown >> -- Found assembler: /usr/local/myclang/bin/clang >> -- Check for working C compiler: /usr/local/myclang/bin/clang >> -- Check for working C compiler: /usr/local/myclang/bin/clang -- broken >> CMake Error at /usr/share/cmake-3.10/Modules/CMakeTestCCompiler.cmake:52 (message): >> The C compiler >> >> "/usr/local/myclang/bin/clang" >> >> is not able to compile a simple test program. >> >> It fails with the following output: >> >> Change Dir: /home/llvm_all/buildrtonly/CMakeFiles/CMakeTmp >> >> Run Build Command:"/usr/bin/ninja" "cmTC_22d97" >> [1/2] Building C object CMakeFiles/cmTC_22d97.dir/testCCompiler.c.o >> [2/2] Linking C executable cmTC_22d97 >> FAILED: cmTC_22d97 >> : && /usr/local/myclang/bin/clang --target=arm-linux-gnueabihf --target=arm-linux-gnueabihf -march=armv7a --gcc-toolchain=/usr/arm-linux-gnueabihf --sysroot=/usr/arm-linux-gnueabihf/lib -fuse-ld=lld CMakeFiles/cmTC_22d97.dir/testCCompiler.c.o -o cmTC_22d97 && : >> ld.lld: error: cannot open crt1.o: No such file or directory >> ld.lld: error: cannot open crti.o: No such file or directory >> ld.lld: error: cannot open crtbegin.o: No such file or directory >> ld.lld: error: unable to find library -lgcc >> ld.lld: error: unable to find library -lgcc_s >> ld.lld: error: unable to find library -lc >> ld.lld: error: unable to find library -lgcc >> ld.lld: error: unable to find library -lgcc_s >> ld.lld: error: cannot open crtend.o: No such file or directory >> ld.lld: error: cannot open crtn.o: No such file or directory >> clang-8: error: linker command failed with exit code 1 (use -v to see invocation) >> ninja: build stopped: subcommand failed. >> >> CMake will not be able to correctly generate this project. >> Call Stack (most recent call first): >> CMakeLists.txt:10 (project) >> -- Configuring incomplete, errors occurred! >> See also "/home/llvm_all/buildrtonly/CMakeFiles/CMakeOutput.log". >> See also "/home/llvm_all/buildrtonly/CMakeFiles/CMakeError.log". >> >> >> Note: Googling this error suggested installing gcc-multilib or linking "sudo ln -s /usr/lib/x86_64-linux-gnu /usr/lib64" (which both did not fix it). But the crt1.o that lld does not seem to find is probably the one from arm-linux-gnueabihf, right? "Locate" says it's right in /usr/arm-linux-gnueabihf/lib. >> >> The instructions to use --gcc-toolchain and --sysroot work well for a >> separate toolchain install directory. They don't seem to work as well >> for a debian multiarch style installation. I think it will be worth >> trying to compile helloworld outside of cmake. If you can get that to >> work then this might help guide us to what flags to use. >> >> On my ubuntu 16.04 machine I've got /usr/arm-linux-gnueabihf and >> /usr/include/arm-linux-gnueabihf and /usr/lib/arm-linux-gnueabihf >> With this configuration the clang linux driver is able to find the >> libraries without the sysroot and gcc-toolchain as it is effectively >> root. Can you try with a simple helloworld program: >> clang --target=arm-linux-gnueabihf hello.c -o hello -fuse-ld=lld >> qemu-arm -L /usr/arm-linux-gnueabihf hello >> If all is well you should see qemu-arm print Hello World. You may need >> to install the package qemu-user if you've not already done so. >> >> With the -v option clang will tell you where it is searching for >> headers and libraries, I've often found that useful in trying to find >> out what is going. >> >> Assuming that this has worked for you can you try removing >> "--gcc-toolchain=/usr/arm-linux-gnueabihf >> --sysroot=/usr/arm-linux-gnueabihf/lib" from your flags in the cmake >> build. >> >> For the errors below it looks like clang is using the default target >> for assembler, note that --target=arm-linux-gnueabihf is missing. I >> have seen that before, and the solution I found was to pass >> -DCMAKE_ASM_FLAGS="same as C flags including >> --target=arm-linux-gnueabihf and -march=armv7a" >> >> Thanks for reporting the problems. If I get time next week I'll have a >> go at improving the documentation. >> >> Peter >> >> Thanks so far! >> >> Christian >> >> >> cmake output with STATIC_LIBRARY: >> >> -- The C compiler identification is Clang 8.0.0 >> -- The CXX compiler identification is Clang 8.0.0 >> -- The ASM compiler identification is Clang >> -- Found assembler: /usr/local/myclang/bin/clang >> -- Check for working C compiler: /usr/local/myclang/bin/clang >> -- Check for working C compiler: /usr/local/myclang/bin/clang -- works >> -- Detecting C compiler ABI info >> -- Detecting C compiler ABI info - done >> -- Detecting C compile features >> -- Detecting C compile features - done >> -- Check for working CXX compiler: /usr/local/myclang/bin/clang++ >> -- Check for working CXX compiler: /usr/local/myclang/bin/clang++ -- works >> -- Detecting CXX compiler ABI info >> -- Detecting CXX compiler ABI info - done >> -- Detecting CXX compile features >> -- Detecting CXX compile features - done >> -- Looking for unwind.h >> -- Looking for unwind.h - found >> -- Found PythonInterp: /usr/bin/python2.7 (found version "2.7.15") >> -- Looking for fopen in c >> -- Looking for fopen in c - found >> -- Looking for __gcc_personality_v0 in gcc_s >> -- Looking for __gcc_personality_v0 in gcc_s - found >> -- Performing Test COMPILER_RT_HAS_NODEFAULTLIBS_FLAG >> -- Performing Test COMPILER_RT_HAS_NODEFAULTLIBS_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_FFREESTANDING_FLAG >> -- Performing Test COMPILER_RT_HAS_FFREESTANDING_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_FPIC_FLAG >> -- Performing Test COMPILER_RT_HAS_FPIC_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_FPIE_FLAG >> -- Performing Test COMPILER_RT_HAS_FPIE_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_FNO_BUILTIN_FLAG >> -- Performing Test COMPILER_RT_HAS_FNO_BUILTIN_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_FNO_EXCEPTIONS_FLAG >> -- Performing Test COMPILER_RT_HAS_FNO_EXCEPTIONS_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_FOMIT_FRAME_POINTER_FLAG >> -- Performing Test COMPILER_RT_HAS_FOMIT_FRAME_POINTER_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_FUNWIND_TABLES_FLAG >> -- Performing Test COMPILER_RT_HAS_FUNWIND_TABLES_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_FNO_STACK_PROTECTOR_FLAG >> -- Performing Test COMPILER_RT_HAS_FNO_STACK_PROTECTOR_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_FNO_SANITIZE_SAFE_STACK_FLAG >> -- Performing Test COMPILER_RT_HAS_FNO_SANITIZE_SAFE_STACK_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_FVISIBILITY_HIDDEN_FLAG >> -- Performing Test COMPILER_RT_HAS_FVISIBILITY_HIDDEN_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_FRTTI_FLAG >> -- Performing Test COMPILER_RT_HAS_FRTTI_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_FNO_RTTI_FLAG >> -- Performing Test COMPILER_RT_HAS_FNO_RTTI_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_FNO_FUNCTION_SECTIONS_FLAG >> -- Performing Test COMPILER_RT_HAS_FNO_FUNCTION_SECTIONS_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_STD_CXX11_FLAG >> -- Performing Test COMPILER_RT_HAS_STD_CXX11_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_FTLS_MODEL_INITIAL_EXEC >> -- Performing Test COMPILER_RT_HAS_FTLS_MODEL_INITIAL_EXEC - Success >> -- Performing Test COMPILER_RT_HAS_FNO_LTO_FLAG >> -- Performing Test COMPILER_RT_HAS_FNO_LTO_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_MSSE3_FLAG >> -- Performing Test COMPILER_RT_HAS_MSSE3_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_MSSE4_2_FLAG >> -- Performing Test COMPILER_RT_HAS_MSSE4_2_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_SYSROOT_FLAG >> -- Performing Test COMPILER_RT_HAS_SYSROOT_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_MCRC_FLAG >> -- Performing Test COMPILER_RT_HAS_MCRC_FLAG - Failed >> -- Performing Test COMPILER_RT_HAS_FVISIBILITY_INLINES_HIDDEN_FLAG >> -- Performing Test COMPILER_RT_HAS_FVISIBILITY_INLINES_HIDDEN_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_GR_FLAG >> -- Performing Test COMPILER_RT_HAS_GR_FLAG - Failed >> -- Performing Test COMPILER_RT_HAS_GS_FLAG >> -- Performing Test COMPILER_RT_HAS_GS_FLAG - Failed >> -- Performing Test COMPILER_RT_HAS_MT_FLAG >> -- Performing Test COMPILER_RT_HAS_MT_FLAG - Failed >> -- Performing Test COMPILER_RT_HAS_Oy_FLAG >> -- Performing Test COMPILER_RT_HAS_Oy_FLAG - Failed >> -- Performing Test COMPILER_RT_HAS_GLINE_TABLES_ONLY_FLAG >> -- Performing Test COMPILER_RT_HAS_GLINE_TABLES_ONLY_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_G_FLAG >> -- Performing Test COMPILER_RT_HAS_G_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_Zi_FLAG >> -- Performing Test COMPILER_RT_HAS_Zi_FLAG - Failed >> -- Performing Test COMPILER_RT_HAS_WALL_FLAG >> -- Performing Test COMPILER_RT_HAS_WALL_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_WERROR_FLAG >> -- Performing Test COMPILER_RT_HAS_WERROR_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_WFRAME_LARGER_THAN_FLAG >> -- Performing Test COMPILER_RT_HAS_WFRAME_LARGER_THAN_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_WGLOBAL_CONSTRUCTORS_FLAG >> -- Performing Test COMPILER_RT_HAS_WGLOBAL_CONSTRUCTORS_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_WC99_EXTENSIONS_FLAG >> -- Performing Test COMPILER_RT_HAS_WC99_EXTENSIONS_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_WGNU_FLAG >> -- Performing Test COMPILER_RT_HAS_WGNU_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_WNON_VIRTUAL_DTOR_FLAG >> -- Performing Test COMPILER_RT_HAS_WNON_VIRTUAL_DTOR_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_WVARIADIC_MACROS_FLAG >> -- Performing Test COMPILER_RT_HAS_WVARIADIC_MACROS_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_WUNUSED_PARAMETER_FLAG >> -- Performing Test COMPILER_RT_HAS_WUNUSED_PARAMETER_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_WCOVERED_SWITCH_DEFAULT_FLAG >> -- Performing Test COMPILER_RT_HAS_WCOVERED_SWITCH_DEFAULT_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_W4_FLAG >> -- Performing Test COMPILER_RT_HAS_W4_FLAG - Failed >> -- Performing Test COMPILER_RT_HAS_WX_FLAG >> -- Performing Test COMPILER_RT_HAS_WX_FLAG - Failed >> -- Performing Test COMPILER_RT_HAS_WD4146_FLAG >> -- Performing Test COMPILER_RT_HAS_WD4146_FLAG - Failed >> -- Performing Test COMPILER_RT_HAS_WD4291_FLAG >> -- Performing Test COMPILER_RT_HAS_WD4291_FLAG - Failed >> -- Performing Test COMPILER_RT_HAS_WD4221_FLAG >> -- Performing Test COMPILER_RT_HAS_WD4221_FLAG - Failed >> -- Performing Test COMPILER_RT_HAS_WD4391_FLAG >> -- Performing Test COMPILER_RT_HAS_WD4391_FLAG - Failed >> -- Performing Test COMPILER_RT_HAS_WD4722_FLAG >> -- Performing Test COMPILER_RT_HAS_WD4722_FLAG - Failed >> -- Performing Test COMPILER_RT_HAS_WD4800_FLAG >> -- Performing Test COMPILER_RT_HAS_WD4800_FLAG - Failed >> -- Looking for __func__ >> -- Looking for __func__ - found >> -- Looking for dlopen in dl >> -- Looking for dlopen in dl - found >> -- Looking for shm_open in rt >> -- Looking for shm_open in rt - found >> -- Looking for pow in m >> -- Looking for pow in m - found >> -- Looking for pthread_create in pthread >> -- Looking for pthread_create in pthread - found >> -- Looking for setupterm in terminfo >> -- Looking for setupterm in terminfo - found >> -- Looking for __cxa_throw in c++ >> -- Looking for __cxa_throw in c++ - found >> -- Looking for __cxa_throw in stdc++ >> -- Looking for __cxa_throw in stdc++ - found >> -- Compiler-RT supported architectures: armhf >> -- Performing Test COMPILER_RT_HAS_STD_C11_FLAG >> -- Performing Test COMPILER_RT_HAS_STD_C11_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_VISIBILITY_HIDDEN_FLAG >> -- Performing Test COMPILER_RT_HAS_VISIBILITY_HIDDEN_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_OMIT_FRAME_POINTER_FLAG >> -- Performing Test COMPILER_RT_HAS_OMIT_FRAME_POINTER_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_FREESTANDING_FLAG >> -- Performing Test COMPILER_RT_HAS_FREESTANDING_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_XRAY_COMPILER_FLAG >> -- Performing Test COMPILER_RT_HAS_XRAY_COMPILER_FLAG - Success >> -- Performing Test COMPILER_RT_HAS_ATOMIC_KEYWORD >> -- Performing Test COMPILER_RT_HAS_ATOMIC_KEYWORD - Success >> -- Builtin supported architectures: armhf >> -- Looking for __VFP_FP__ >> -- Looking for __VFP_FP__ - found >> -- Configuring done >> -- Generating done >> -- Build files have been written to: /home/llvm_all/buildrtonly >> >> -------------------------------------- >> >> ninja output: >> >> >> root at christian-forschung-virtual-machine:/home/llvm_all/buildrtonly# ninja builtins >> >> [1/207] Building ASM object lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapsi2.S.o >> FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapsi2.S.o >> /usr/local/myclang/bin/clang -DVISIBILITY_HIDDEN -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILER_RT_ARMHF_TARGET -MD -MT lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapsi2.S.o -MF lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapsi2.S.o.d -o lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapsi2.S.o -c /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:12:2: error: unknown directive >> .syntax unified >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:25:3: error: invalid instruction mnemonic 'eor' >> eor r1, r0, r0, ror #16 >> ^~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:26:15: error: unknown token in expression >> bic r1, r1, #0xff0000 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:27:3: error: unknown use of instruction mnemonic without a size suffix >> mov r1, r1, lsr #8 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:28:3: error: invalid instruction mnemonic 'eor' >> eor r0, r1, r0, ror #8 >> ^~~ >> [2/207] Building ASM object lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapdi2.S.o >> FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapdi2.S.o >> /usr/local/myclang/bin/clang -DVISIBILITY_HIDDEN -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILER_RT_ARMHF_TARGET -MD -MT lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapdi2.S.o -MF lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapdi2.S.o.d -o lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapdi2.S.o -c /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:12:2: error: unknown directive >> .syntax unified >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:26:5: error: invalid instruction mnemonic 'eor' >> eor r2, r0, r0, ror #16 >> ^~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:27:17: error: unknown token in expression >> bic r2, r2, #0xff0000 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:28:5: error: unknown use of instruction mnemonic without a size suffix >> mov r2, r2, lsr #8 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:29:5: error: invalid instruction mnemonic 'eor' >> eor r2, r2, r0, ror #8 >> ^~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:31:5: error: invalid instruction mnemonic 'eor' >> eor r0, r1, r1, ror #16 >> ^~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:32:17: error: unknown token in expression >> bic r0, r0, #0xff0000 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:33:5: error: unknown use of instruction mnemonic without a size suffix >> mov r0, r0, lsr #8 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:34:5: error: invalid instruction mnemonic 'eor' >> eor r0, r0, r1, ror #8 >> ^~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:39:5: error: unknown use of instruction mnemonic without a size suffix >> mov r1, r2 >> ^ >> [3/207] Building ASM object lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/comparesf2.S.o >> FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/comparesf2.S.o >> /usr/local/myclang/bin/clang -DVISIBILITY_HIDDEN -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILER_RT_ARMHF_TARGET -MD -MT lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/comparesf2.S.o -MF lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/comparesf2.S.o.d -o lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/comparesf2.S.o -c /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:41:2: error: unknown directive >> .syntax unified >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:45:1: error: unexpected token at start of statement >> @ int __eqsf2(float a, float b) >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:50:5: error: invalid operand for instruction >> vmov r0, s0 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:51:5: error: invalid operand for instruction >> vmov r1, s1 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:53:5: error: unknown use of instruction mnemonic without a size suffix >> mov r2, r0, lsl #1 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:54:5: error: unknown use of instruction mnemonic without a size suffix >> mov r3, r1, lsl #1 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:56:5: error: invalid instruction mnemonic 'orrs' >> orrs r12, r2, r3, lsr #1 >> ^~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:58:5: error: invalid instruction mnemonic 'it' >> it ne >> ^~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:59:5: error: invalid instruction mnemonic 'eorsne' >> eorsne r12, r0, r1 >> ^~~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:61:5: error: invalid instruction mnemonic 'it' >> it pl >> ^~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:62:5: error: invalid instruction mnemonic 'subspl' >> subspl r0, r2, r3 >> ^~~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:64:5: error: invalid instruction mnemonic 'it' >> it lo >> ^~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:65:5: error: invalid instruction mnemonic 'mvnlo' >> mvnlo r0, r1, asr #31 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:67:5: error: invalid instruction mnemonic 'it' >> it hi >> ^~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:68:5: error: invalid instruction mnemonic 'movhi' >> movhi r0, r1, asr #31 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:70:5: error: invalid instruction mnemonic 'it' >> it ne >> ^~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:71:19: error: unknown token in expression >> orrne r0, r0, #1 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:167:13: error: unknown token in expression >> cmp r2, #0xff000000 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:168:5: error: invalid instruction mnemonic 'ite' >> ite ls >> ^~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:169:15: error: unknown token in expression >> cmpls r3, #0xff000000 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:170:15: error: unknown token in expression >> movhi r0, #1 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:179:1: error: unexpected token at start of statement >> @ int __gtsf2(float a, float b) >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:188:5: error: invalid operand for instruction >> vmov r0, s0 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:189:5: error: invalid operand for instruction >> vmov r1, s1 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:191:5: error: unknown use of instruction mnemonic without a size suffix >> mov r2, r0, lsl #1 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:192:5: error: unknown use of instruction mnemonic without a size suffix >> mov r3, r1, lsl #1 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:193:5: error: invalid instruction mnemonic 'orrs' >> orrs r12, r2, r3, lsr #1 >> ^~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:194:5: error: invalid instruction mnemonic 'it' >> it ne >> ^~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:195:5: error: invalid instruction mnemonic 'eorsne' >> eorsne r12, r0, r1 >> ^~~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:196:5: error: invalid instruction mnemonic 'it' >> it pl >> ^~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:197:5: error: invalid instruction mnemonic 'subspl' >> subspl r0, r2, r3 >> ^~~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:198:5: error: invalid instruction mnemonic 'it' >> it lo >> ^~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:199:5: error: invalid instruction mnemonic 'mvnlo' >> mvnlo r0, r1, asr #31 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:200:5: error: invalid instruction mnemonic 'it' >> it hi >> ^~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:201:5: error: invalid instruction mnemonic 'movhi' >> movhi r0, r1, asr #31 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:202:5: error: invalid instruction mnemonic 'it' >> it ne >> ^~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:203:19: error: unknown token in expression >> orrne r0, r0, #1 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:204:13: error: unknown token in expression >> cmp r2, #0xff000000 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:205:5: error: invalid instruction mnemonic 'ite' >> ite ls >> ^~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:206:15: error: unknown token in expression >> cmpls r3, #0xff000000 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:207:15: error: unknown token in expression >> movhi r0, #-1 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:214:1: error: unexpected token at start of statement >> @ int __unordsf2(float a, float b) >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:220:5: error: invalid operand for instruction >> vmov r0, s0 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:221:5: error: invalid operand for instruction >> vmov r1, s1 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:224:18: error: unknown token in expression >> lsls r2, r0, #1 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:225:18: error: unknown token in expression >> lsls r3, r1, #1 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:226:14: error: unknown token in expression >> movs r0, #0 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:277:13: error: unknown token in expression >> cmp r2, #0xff000000 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:278:5: error: invalid instruction mnemonic 'ite' >> ite ls >> ^~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:279:15: error: unknown token in expression >> cmpls r3, #0xff000000 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:280:15: error: unknown token in expression >> movhi r0, #1 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:287:2: error: invalid operand for instruction >> vmov s0, r0 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:288:2: error: invalid operand for instruction >> vmov s1, r1 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:289:2: error: invalid instruction mnemonic 'b' >> b __unordsf2 >> ^ >> [4/207] Building ASM object lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzsi2.S.o >> FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzsi2.S.o >> /usr/local/myclang/bin/clang -DVISIBILITY_HIDDEN -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILER_RT_ARMHF_TARGET -MD -MT lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzsi2.S.o -MF lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzsi2.S.o.d -o lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzsi2.S.o -c /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:16:2: error: unknown directive >> .syntax unified >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:33:2: error: unknown use of instruction mnemonic without a size suffix >> mov r1, 1 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:2: error: invalid instruction mnemonic 'lsrs' >> lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 >> ^~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:19: error: invalid instruction mnemonic 'movne' >> lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:33: error: invalid instruction mnemonic 'addeq' >> lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:36:2: error: invalid instruction mnemonic 'lsrs' >> lsrs r2, r0, 8; movne r0, r2; addeq r1, 8 >> ^~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:36:18: error: invalid instruction mnemonic 'movne' >> lsrs r2, r0, 8; movne r0, r2; addeq r1, 8 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:36:32: error: invalid instruction mnemonic 'addeq' >> lsrs r2, r0, 8; movne r0, r2; addeq r1, 8 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:37:2: error: invalid instruction mnemonic 'lsrs' >> lsrs r2, r0, 4; movne r0, r2; addeq r1, 4 >> ^~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:37:18: error: invalid instruction mnemonic 'movne' >> lsrs r2, r0, 4; movne r0, r2; addeq r1, 4 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:37:32: error: invalid instruction mnemonic 'addeq' >> lsrs r2, r0, 4; movne r0, r2; addeq r1, 4 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:38:2: error: invalid instruction mnemonic 'lsrs' >> lsrs r2, r0, 2; movne r0, r2; addeq r1, 2 >> ^~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:38:18: error: invalid instruction mnemonic 'movne' >> lsrs r2, r0, 2; movne r0, r2; addeq r1, 2 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:38:32: error: invalid instruction mnemonic 'addeq' >> lsrs r2, r0, 2; movne r0, r2; addeq r1, 2 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:40:2: error: unknown use of instruction mnemonic without a size suffix >> sub r0, r1, r0, lsr #1 >> ^ >> [5/207] Building ASM object lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzdi2.S.o >> FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzdi2.S.o >> /usr/local/myclang/bin/clang -DVISIBILITY_HIDDEN -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILER_RT_ARMHF_TARGET -MD -MT lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzdi2.S.o -MF lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzdi2.S.o.d -o lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzdi2.S.o -c /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:16:2: error: unknown directive >> .syntax unified >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:50:2: error: unknown use of instruction mnemonic without a size suffix >> cmp r1, 0 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:51:2: error: invalid instruction mnemonic 'movne' >> movne r0, r1 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:53:2: error: invalid instruction mnemonic 'movne' >> movne r1, 1 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:54:2: error: invalid instruction mnemonic 'moveq' >> moveq r1, 33 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:56:2: error: invalid instruction mnemonic 'lsrs' >> lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 >> ^~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:56:19: error: invalid instruction mnemonic 'movne' >> lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:56:33: error: invalid instruction mnemonic 'addeq' >> lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:57:2: error: invalid instruction mnemonic 'lsrs' >> lsrs r2, r0, 8; movne r0, r2; addeq r1, 8 >> ^~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:57:18: error: invalid instruction mnemonic 'movne' >> lsrs r2, r0, 8; movne r0, r2; addeq r1, 8 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:57:32: error: invalid instruction mnemonic 'addeq' >> lsrs r2, r0, 8; movne r0, r2; addeq r1, 8 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:58:2: error: invalid instruction mnemonic 'lsrs' >> lsrs r2, r0, 4; movne r0, r2; addeq r1, 4 >> ^~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:58:18: error: invalid instruction mnemonic 'movne' >> lsrs r2, r0, 4; movne r0, r2; addeq r1, 4 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:58:32: error: invalid instruction mnemonic 'addeq' >> lsrs r2, r0, 4; movne r0, r2; addeq r1, 4 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:59:2: error: invalid instruction mnemonic 'lsrs' >> lsrs r2, r0, 2; movne r0, r2; addeq r1, 2 >> ^~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:59:18: error: invalid instruction mnemonic 'movne' >> lsrs r2, r0, 2; movne r0, r2; addeq r1, 2 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:59:32: error: invalid instruction mnemonic 'addeq' >> lsrs r2, r0, 2; movne r0, r2; addeq r1, 2 >> ^~~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:61:2: error: unknown use of instruction mnemonic without a size suffix >> sub r0, r1, r0, lsr #1 >> ^ >> [6/207] Building ASM object lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/divmodsi4.S.o >> FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/divmodsi4.S.o >> /usr/local/myclang/bin/clang -DVISIBILITY_HIDDEN -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILER_RT_ARMHF_TARGET -MD -MT lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/divmodsi4.S.o -MF lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/divmodsi4.S.o.d -o lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/divmodsi4.S.o -c /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:24:2: error: unknown directive >> .syntax unified >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:28:1: error: unexpected token at start of statement >> @ int __divmodsi4(int divident, int divisor, int *remainder) >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:29:1: error: unexpected token at start of statement >> @ Calculate the quotient and remainder of the (signed) division. The return >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:30:1: error: unexpected token at start of statement >> @ value is the quotient, the remainder is placed in the variable. >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:46:11: error: Invalid rounding mode. >> push {r4-r7, lr} ; add r7, sp, #12 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:46:36: error: unknown token in expression >> push {r4-r7, lr} ; add r7, sp, #12 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:49:5: error: invalid instruction mnemonic 'eor' >> eor r4, r0, r1 >> ^~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:50:5: error: unknown use of instruction mnemonic without a size suffix >> mov r5, r0 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:51:5: error: unknown use of instruction mnemonic without a size suffix >> mov r6, r2 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:53:5: error: invalid instruction mnemonic 'eor' >> eor ip, r0, r0, asr #31 >> ^~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:54:5: error: invalid instruction mnemonic 'eor' >> eor lr, r1, r1, asr #31 >> ^~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:55:5: error: unknown use of instruction mnemonic without a size suffix >> sub r0, ip, r0, asr #31 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:56:5: error: unknown use of instruction mnemonic without a size suffix >> sub r1, lr, r1, asr #31 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:58:5: error: invalid instruction mnemonic 'bl' >> bl __udivmodsi4 >> ^~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:60:5: error: invalid instruction mnemonic 'ldr' >> ldr r1, [r6] >> ^~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:61:5: error: invalid instruction mnemonic 'eor' >> eor r0, r0, r4, asr #31 >> ^~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:62:5: error: invalid instruction mnemonic 'eor' >> eor r1, r1, r5, asr #31 >> ^~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:63:5: error: unknown use of instruction mnemonic without a size suffix >> sub r0, r0, r4, asr #31 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:64:5: error: unknown use of instruction mnemonic without a size suffix >> sub r1, r1, r5, asr #31 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:65:5: error: unknown use of instruction mnemonic without a size suffix >> str r1, [r6] >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:66:10: error: Invalid rounding mode. >> pop {r4-r7, pc} >> >> >> >> >> >> >> >> >> >> >> >> On 04.12.2018 15:54, Peter Smith via llvm-dev wrote: >> >> Hello, >> >> Just a few quick observations. >> - It looks like you may have downloaded the linux arm toolchain. For bare metal you probably wanted the Arm embedded toolchain, https://developer.arm.com/open-source/gnu-toolchain/gnu-rm >> -- That toolchain will have newlib rather than glibc, I don't know whether it will have one pre-compiled for v4 though. If not you may have to find an older toolchain or build newlib youtself. >> - The bare-metal driver in clang (arm-none-eabi) is not multilib aware and won't put the paths to the libraries on the link line, the -L flag >> -- I have found that following the samples in the gnu embedded toolchain with gcc using the -v flag to get the paths it is using, then use these with lld. >> >> If you can let us know what problems you are seeing building compiler-rt then we may be able to help. I'm not sure there is anyone building it for arm v4 so you may be hitting new problems. I'm away at a conference today and tomorrow but I can try later in the week. >> >> Peter >> >> On Tue, 4 Dec 2018 at 12:21, cscheuer via llvm-dev <llvm-dev at lists.llvm.org> wrote: >> >> I am currently trying to compile a pretty simple program to work on an >> experimental board. It contains an (FPGA-version of) an ARMv4 processor. >> So basically, I try this (on my Ubuntu 18.04.1 LTS): >> clang -v --target=arm-none-eabi -c barehello.c -o barehelloCLANG.o >> clang -v --target=arm-none-eabi -c io.c -o io.o >> clang -v --target=arm-none-eabi barehelloCLANG.o io.o -o >> helloCLANGstatic -static -fuse-ld=lld >> >> Which results in >> >> clang version 8.0.0 (https://git.llvm.org/git/clang.git/ >> a152c7a4b7ba8f4cb9532ead9a38a7121db43d50) >> (https://git.llvm.org/git/llvm.git/ >> 1959ce6f3e01241919968ac1911fd45660239d23) >> Target: arm-none-unknown-eabi >> Thread model: posix >> InstalledDir: /usr/local/my_clang/bin >> "/usr/local/my_clang/bin/ld.lld" barehelloCLANG.o io.o -Bstatic >> -L/usr/local/my_clang/lib/clang/8.0.0/lib/baremetal -lc -lm >> -lclang_rt.builtins-arm.a -o helloCLANGstatic >> ld.lld: error: unable to find library -lc >> ld.lld: error: unable to find library -lm >> ld.lld: error: unable to find library -lclang_rt.builtins-arm.a >> clang-8: error: ld.lld command failed with exit code 1 (use -v to see >> invocation) >> >> on the linking part. I downloaded a sysroot from >> https://developer.arm.com/open-source/gnu-toolchain/gnu-a/downloads/8-2-2018-08 >> and tried to include it via --sysroot=/my/path/to/it, but clang acted >> unimpressed with the same errors. So I'm missing clang_rt.builtins-arm.a >> I guess, but that does not exist on my system. >> So next, I tried basically every version of "how to cross-compile >> llvm/clang/compiler-rt" That google came up with, but was not able to >> get a single one to actually work. Any ideas how to get this running? >> Thanks in advance! >> _______________________________________________ >> LLVM Developers mailing list >> llvm-dev at lists.llvm.org >> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev >> >> >> _______________________________________________ >> LLVM Developers mailing list >> llvm-dev at lists.llvm.org >> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev >> >> >> _______________________________________________ >> LLVM Developers mailing list >> llvm-dev at lists.llvm.org >> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev >> >>-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20181213/d86947f9/attachment-0001.html> -------------- next part -------------- A non-text attachment was scrubbed... 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Peter Smith via llvm-dev
2018-Dec-13 17:10 UTC
[llvm-dev] Compiling for baremetal ARMv4 on Ubuntu Linux
Hello Christian,
I've just retried the runtimes way of building for v6m, v7m and v7e-m
. My cmake command was
ARMEABIGCC=/path/to/gcceabi/arm-none-eabi
cmake \
-G Ninja\
-DBAREMETAL_ARMV6M_SYSROOT=${ARMEABIGCC}\
-DBAREMETAL_ARMV7M_SYSROOT=${ARMEABIGCC}\
-DBAREMETAL_ARMV7EM_SYSROOT=${ARMEABIGCC}\
-DCMAKE_BUILD_TYPE=Release\
-C/path/to/llvm/tools/clang/cmake/caches/BaremetalARM.cmake \
/path/to/llvm
The cache file requires clang and lld. From the build directory they
will go into lib/clang. That worked for me (TM). Hopefully if you can
edit the paths it will work for you. My guess is that you'll want to
set
ARMEABIGCC=/home/crichter/Downloads/gcc-arm-none-eabi-5_4-2016q3/arm-none-eabi
Peter
On Thu, 13 Dec 2018 at 12:08, Christian Richter
<christian.richter at hsu-hh.de> wrote:>
> Hello Peter and Lists,
>
> thanks a lot, that way it worked out! The final cmake was
>
> cmake -G "Ninja" ../llvm/projects/compiler-rt/
-DCOMPILER_RT_BUILD_BUILTINS=ON -DCOMPILER_RT_BUILD_SANITIZERS=OFF
-DCOMPILER_RT_BUILD_XRAY=OFF -DCOMPILER_RT_BUILD_LIBFUZZER=OFF
-DCOMPILER_RT_BUILD_PROFILE=OFF -DCMAKE_C_COMPILER=/usr/local/myclang/bin/clang
-DCMAKE_AR=/usr/local/myclang/bin/llvm-ar
-DCMAKE_NM=/usr/local/myclang/bin/llvm-nm
-DCMAKE_RANLIB=/usr/local/myclang/bin/llvm-ranlib
-DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY
-DCMAKE_C_COMPILER_TARGET="arm-linux-gnueabihf"
-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON
-DLLVM_CONFIG_PATH=/usr/local/myclang/bin/llvm-config
-DCMAKE_ASM_FLAGS="--target=arm-linux-gnueabihf -march=armv7a
--gcc-toolchain=/home/crichter/arm-linux-gnueabihf/gcc-arm
--sysroot=/home/crichter/arm-linux-gnueabihf/sysroot-glibc/"
-DCMAKE_C_FLAGS="--target=arm-linux-gnueabihf -march=armv7a
--gcc-toolchain=/home/crichter/arm-linux-gnueabihf/gcc-arm
--sysroot=/home/crichter/arm-linux-gnueabihf/sysroot-glibc/"
>
> where sysroot-glibc/ contains sysroot-glibc-8.2-x86_64 and
/arm-linux-gnueabihf/gcc-arm contains gcc-arm-8.2 for Aarch32 hard float from
https://developer.arm.com/open-source/gnu-toolchain/gnu-a/downloads. This
resulted in successfully building libclang_rt.builtins-armhf.a
>
> So next, I tried to use the cmake recipe for BaremetalARM as in the
documentation. Therefore, I moved the compiler-rt directory from llvm/projects
to llvm/runtimes. I downloaded the latest updates of gcc-arm-none-eabi6/7/8 from
https://developer.arm.com/open-source/gnu-toolchain/gnu-rm/downloads and tried
to build in a new directory. But whether I gave the -C the path to
BaremetalARM.cmake's directory or the file itself, nothing started. I was
unsure whether to keep the paths to llvm-ar, llvm-nm and so on as well and
whether or not to give the new compiler-rt-directory or the whole llvm-directory
as a starting point. Am I using the wrong build directory here? Is this still
"Ninja"? The error message (see below) is true:
/home/llvm_4rt/llvm/tools/clang/cmake/caches contains no CMakeLists.txt, just
the BaremetalARM.cmake among other recipes. Giving -C the file directly just
leads to a "this is a file, not a directory" error.
>
> This is (one of my) cmake commands:
>
> root at christian-forschung-virtual-machine:/home/llvm_4rt/buildrecipe#
cmake -G "Ninja" ../llvm/runtimes/compiler-rt
-DCOMPILER_RT_BUILD_BUILTINS=ON -DCOMPILER_RT_BUILD_SANITIZERS=OFF
-DCOMPILER_RT_BUILD_XRAY=OFF -DCOMPILER_RT_BUILD_LIBFUZZER=OFF
-DCOMPILER_RT_BUILD_PROFILE=OFF -DCMAKE_C_COMPILER=/usr/local/myclang/bin/clang
-DCMAKE_AR=/usr/local/myclang/bin/llvm-ar
-DCMAKE_NM=/usr/local/myclang/bin/llvm-nm
-DCMAKE_RANLIB=/usr/local/myclang/bin/llvm-ranlib
-DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY
-DCMAKE_C_COMPILER_TARGET="arm-linux-gnueabihf"
-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON
-DLLVM_CONFIG_PATH=/usr/local/myclang/bin/llvm-config
-DBAREMETAL_ARMV5M_SYSROOT=/home/crichter/Downloads/gcc-arm-none-eabi-5_4-2016q3
>
-DBAREMETAL_ARMV6M_SYSROOT=/home/crichter/Downloads/gcc-arm-none-eabi-6-2017-q2-update
-DBAREMETAL_ARMV7M_SYSROOT=/home/crichter/Downloads/gcc-arm-none-eabi-7-2018-q2-update
-C /home/llvm_4rt/llvm/tools/clang/cmake/caches
>
> loading initial cache file /home/llvm_4rt/llvm/tools/clang/cmake/caches
> CMake Error: Error processing file:
/home/llvm_4rt/llvm/tools/clang/cmake/caches
> CMake Error: The source directory
"/home/llvm_4rt/llvm/tools/clang/cmake/caches" does not appear to
contain CMakeLists.txt.
> Specify --help for usage, or press the help button on the CMake GUI.
>
> So I'm obviously using it wrong, would appreciate any pointers in the
right direction!
> Christian
>
>
> On 10.12.2018 17:59, Peter Smith wrote:
>
> Hello Christian,
>
> Yes it does look like clang will add /usr/local/include unless
> --nostdinc is used, although that will mean skipping a lot of other
> include directories that clang will implicitly add based on the
> target. I can think of a couple of ways to proceed:
> 1.) use -nostdinc and add in the directories you need manually
> 2.) use a cross gcc toolchain in a different directory such as one
> from (https://developer.arm.com/open-source/gnu-toolchain/gnu-a/downloads)
> and use --gcc-toolchain and --sysroot.
>
> I must admit I've only ever done 2.) myself as I've wanted to make
> sure I've not inadvertently depended on something on my machine.
>
> Apologies for the confusion.
>
> Peter
>
> On Mon, 10 Dec 2018 at 16:05, Christian Richter
> <christian.richter at hsu-hh.de> wrote:
>
> Hello again!
>
> Tried out the small Hello World Setup, worked as intended:
>
> root at christian-forschung-virtual-machine:/home/progs# clang -v
--target=arm-linux-gnueabihf hello.c -o hello -fuse-ld=lld
> clang version 8.0.0 (https://git.llvm.org/git/clang.git/
a152c7a4b7ba8f4cb9532ead9a38a7121db43d50) (https://git.llvm.org/git/llvm.git/
1959ce6f3e01241919968ac1911fd45660239d23)
> Target: arm-unknown-linux-gnueabihf
> Thread model: posix
> InstalledDir: /usr/local/myclang/bin
> Found candidate GCC installation: /usr/lib/gcc-cross/arm-linux-gnueabihf/7
> Found candidate GCC installation:
/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0
> Selected GCC installation: /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0
> Candidate multilib: .;@m32
> Selected multilib: .;@m32
> "/usr/local/myclang/bin/clang-8" -cc1 -triple
armv6kz-unknown-linux-gnueabihf -emit-obj -mrelax-all -disable-free
-disable-llvm-verifier -discard-value-names -main-file-name hello.c
-mrelocation-model static -mthread-model posix -mdisable-fp-elim -fmath-errno
-masm-verbose -mconstructor-aliases -fuse-init-array -target-cpu arm1176jzf-s
-target-feature +strict-align -target-abi aapcs-linux -mfloat-abi hard
-fallow-half-arguments-and-returns -dwarf-column-info -debugger-tuning=gdb -v
-resource-dir /usr/local/myclang/lib/clang/8.0.0 -internal-isystem
/usr/local/include -internal-isystem /usr/local/myclang/lib/clang/8.0.0/include
-internal-externc-isystem /include -internal-externc-isystem /usr/include
-fdebug-compilation-dir /home/progs -ferror-limit 19 -fmessage-length 202
-fno-signed-char -fobjc-runtime=gcc -fdiagnostics-show-option
-fcolor-diagnostics -o /tmp/hello-98a3a7.o -x c hello.c -faddrsig
> clang -cc1 version 8.0.0 based upon LLVM 8.0.0svn default target
x86_64-unknown-linux-gnu
> ignoring nonexistent directory "/include"
> #include "..." search starts here:
> #include <...> search starts here:
> /usr/local/include
> /usr/local/myclang/lib/clang/8.0.0/include
> /usr/include
> End of search list.
> "/usr/local/myclang/bin/ld.lld" -EL -z relro -X --hash-style=gnu
--eh-frame-hdr -m armelf_linux_eabi -dynamic-linker /lib/ld-linux-armhf.so.3 -o
hello
/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib/../lib/crt1.o
/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib/../lib/crti.o
/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/crtbegin.o
-L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0
-L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib/../lib
-L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../lib
-L/usr/local/myclang/bin/../lib -L/lib/../lib -L/usr/lib/../lib
-L/usr/lib/arm-linux-gnueabihf/../../lib
-L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib
-L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../..
-L/usr/local/myclang/bin/../lib -L/lib -L/usr/lib /tmp/hello-98a3a7.o -lgcc
--as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed
/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/crtend.o
/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib/../lib/crtn.o
>
> root at christian-forschung-virtual-machine:/home/progs# qemu-arm -L
/usr/arm-linux-gnueabihf hello
>
> Hello, World!
>
> So far, so good. The Paths written more readable seem to be
>
> /usr/local/myclang/lib, /lib, /usr/lib, /usr/arm-linux-gnueabihf/lib, so no
surprised there.
>
> Then I added the suggested -DCMAKE_ASM_FLAGS to the cmake for the
standalone compiler-rt build while leaving out the --sysroot and
--gcc-toolchain:
>
> cmake -G "Ninja" ../llvm/projects/compiler-rt/
-DCOMPILER_RT_BUILD_BUILTINS=ON -DCOMPILER_RT_BUILD_SANITIZERS=OFF
-DCOMPILER_RT_BUILD_XRAY=OFF -DCOMPILER_RT_BUILD_LIBFUZZER=OFF
-DCOMPILER_RT_BUILD_PROFILE=OFF -DCMAKE_C_COMPILER=/usr/local/myclang/bin/clang
-DCMAKE_AR=/usr/local/myclang/bin/llvm-ar
-DCMAKE_NM=/usr/local/myclang/bin/llvm-nm
-DCMAKE_RANLIB=/usr/local/myclang/bin/llvm-ranlib
-DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY
-DCMAKE_C_COMPILER_TARGET="arm-linux-gnueabihf"
-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON
-DLLVM_CONFIG_PATH=/usr/local/myclang/bin/llvm-config
-DCMAKE_ASM_FLAGS="--target=arm-linux-gnueabihf -march=armv7a"
-DCMAKE_C_FLAGS="--target=arm-linux-gnueabihf -march=armv7a"
>
> now "ninja builtins" at least starts working, but fails after a
while (see below). The error seems similar to
http://lists.llvm.org/pipermail/llvm-dev/2011-September/043289.html to me, so it
might still be some variant of the problem from before: Using a x86-header where
an ARM one would be needed.
>
> The ninja builtins output:
>
> root at christian-forschung-virtual-machine:/home/llvm_all/buildrtonly#
ninja builtins
> [147/207] Building C object
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/emutls.c.o
> FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/emutls.c.o
> /usr/local/myclang/bin/clang --target=arm-linux-gnueabihf
-DVISIBILITY_HIDDEN --target=arm-linux-gnueabihf -march=armv7a -Wall
-Wno-unused-parameter -fno-lto -std=c11 -fPIC -fno-builtin
-fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer
-DCOMPILER_RT_ARMHF_TARGET -MD -MT
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/emutls.c.o -MF
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/emutls.c.o.d -o
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/emutls.c.o -c
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/emutls.c
> In file included from
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/emutls.c:41:
> /usr/include/pthread.h:682:6: error: 'regparm' is not valid on this
platform
> __cleanup_fct_attribute;
> ^~~~~~~~~~~~~~~~~~~~~~~
> /usr/include/bits/pthreadtypes-arch.h:103:50: note: expanded from macro
'__cleanup_fct_attribute'
> # define __cleanup_fct_attribute __attribute__ ((__regparm__ (1)))
> ^ ~
> In file included from
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/emutls.c:41:
> /usr/include/pthread.h:694:3: error: 'regparm' is not valid on this
platform
> __cleanup_fct_attribute;
> ^~~~~~~~~~~~~~~~~~~~~~~
> /usr/include/bits/pthreadtypes-arch.h:103:50: note: expanded from macro
'__cleanup_fct_attribute'
> # define __cleanup_fct_attribute __attribute__ ((__regparm__ (1)))
> ^ ~
> In file included from
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/emutls.c:41:
> /usr/include/pthread.h:735:6: error: 'regparm' is not valid on this
platform
> __cleanup_fct_attribute __attribute__ ((__noreturn__))
> ^~~~~~~~~~~~~~~~~~~~~~~
> /usr/include/bits/pthreadtypes-arch.h:103:50: note: expanded from macro
'__cleanup_fct_attribute'
> # define __cleanup_fct_attribute __attribute__ ((__regparm__ (1)))
> ^ ~
> 3 errors generated.
> [148/207] Building C object
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/gcc_personality_v0.c.o
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:148:47:
warning: declaration of 'struct _Unwind_Exception' will not be visible
outside of this function [-Wvisibility]
> _Unwind_Reason_Code __gnu_unwind_frame(struct _Unwind_Exception *,
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:153:23:
warning: declaration of 'struct _Unwind_Exception' will not be visible
outside of this function [-Wvisibility]
> continueUnwind(struct _Unwind_Exception *exceptionObject,
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:160:28:
warning: incompatible pointer types passing 'struct _Unwind_Exception *'
to parameter of type 'struct _Unwind_Exception *'
[-Wincompatible-pointer-types]
> if (__gnu_unwind_frame(exceptionObject, context) != _URC_OK)
> ^~~~~~~~~~~~~~~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:148:66:
note: passing argument to parameter here
> _Unwind_Reason_Code __gnu_unwind_frame(struct _Unwind_Exception *,
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:184:38:
warning: declaration of 'struct _Unwind_Exception' will not be visible
outside of this function [-Wvisibility]
> _Unwind_State state, struct _Unwind_Exception *exceptionObject,
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:202:31:
warning: incompatible pointer types passing 'struct _Unwind_Exception *'
to parameter of type 'struct _Unwind_Exception *'
[-Wincompatible-pointer-types]
> return continueUnwind(exceptionObject, context);
> ^~~~~~~~~~~~~~~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:153:42:
note: passing argument to parameter 'exceptionObject' here
> continueUnwind(struct _Unwind_Exception *exceptionObject,
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:207:31:
warning: incompatible pointer types passing 'struct _Unwind_Exception *'
to parameter of type 'struct _Unwind_Exception *'
[-Wincompatible-pointer-types]
> return continueUnwind(exceptionObject, context);
> ^~~~~~~~~~~~~~~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:153:42:
note: passing argument to parameter 'exceptionObject' here
> continueUnwind(struct _Unwind_Exception *exceptionObject,
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:250:27:
warning: incompatible pointer types passing 'struct _Unwind_Exception *'
to parameter of type 'struct _Unwind_Exception *'
[-Wincompatible-pointer-types]
> return continueUnwind(exceptionObject, context);
> ^~~~~~~~~~~~~~~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:153:42:
note: passing argument to parameter 'exceptionObject' here
> continueUnwind(struct _Unwind_Exception *exceptionObject,
> ^
> 7 warnings generated.
> [152/207] Building ASM object
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/aeabi_cdcmp.S.o
> ninja: build stopped: subcommand failed.
>
> Almost there! Thanks in advance!
>
> Christian
>
>
>
> On 07.12.2018 17:40, Peter Smith wrote:
>
> Hello Christian,
>
> I've put some comments inline
>
> On Fri, 7 Dec 2018 at 15:48, Christian Richter via llvm-dev
> <llvm-dev at lists.llvm.org> wrote:
>
> Hello,
>
> on the problems cross-building compiler-rt: Tried to follow
https://llvm.org/docs/HowToCrossCompileBuiltinsOnArm.html which lead to this
cmake:
>
> cmake -G "Ninja" ../llvm/projects/compiler-rt/
-DCOMPILER_RT_BUILD_BUILTINS=ON -DCOMPILER_RT_BUILD_SANITIZERS=OFF
-DCOMPILER_RT_BUILD_XRAY=OFF -DCOMPILER_RT_BUILD_LIBFUZZER=OFF
-DCOMPILER_RT_BUILD_PROFILE=OFF -DCMAKE_C_COMPILER=/usr/local/myclang/bin/clang
-DCMAKE_AR=/usr/local/myclang/bin/llvm-ar
-DCMAKE_NM=/usr/local/myclang/bin/llvm-nm
-DCMAKE_RANLIB=/usr/local/myclang/bin/llvm-ranlib
-DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY
-DCMAKE_C_COMPILER_TARGET="arm-linux-gnueabihf"
-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON
-DLLVM_CONFIG_PATH=/usr/local/myclang/bin/llvm-config
-DCMAKE_C_FLAGS="--target=arm-linux-gnueabihf -march=armv7a
--gcc-toolchain=/usr/arm-linux-gnueabihf
--sysroot=/usr/arm-linux-gnueabihf/lib"
>
> Some small notes:
>
> - Used -DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY instead of
-DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld" as Peter Smith suggested
because it actually is a library and therefore does not need to be linked. If I
do not change that, the cmake does not work (see below).
>
> - used -G "Ninja" although not explicitly stated in the tutorial
as they use "ninja builtins" next.
>
> - had to change --march=armv7a to -march=armv7a as clang did not accept the
first one.
>
> the cmake was successful, but the ninja builtins was not (see both outputs
below). Am I doing the --gcc-toolchain / --sysroot part right? These are just
the places where the result of "apt install arm-linux-gnueabihf"
lives.
>
> cmake output with -DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld":
>
> Thanks for the comments. I will try and revisit that document next
> week and will post an update.
>
> root at christian-forschung-virtual-machine:/home/llvm_all/buildrtonly#
cmake -G "Ninja" ../llvm/projects/compiler-rt/
-DCOMPILER_RT_BUILD_BUILTINS=ON -DCOMPILER_RT_BUILD_SANITIZERS=OFF
-DCOMPILER_RT_BUILD_XRAY=OFF -DCOMPILER_RT_BUILD_LIBFUZZER=OFF
-DCOMPILER_RT_BUILD_PROFILE=OFF -DCMAKE_C_COMPILER=/usr/local/myclang/bin/clang
-DCMAKE_AR=/usr/local/myclang/bin/llvm-ar
-DCMAKE_NM=/usr/local/myclang/bin/llvm-nm
-DCMAKE_RANLIB=/usr/local/myclang/bin/llvm-ranlib
-DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld"
-DCMAKE_C_COMPILER_TARGET="arm-linux-gnueabihf"
-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON
-DLLVM_CONFIG_PATH=/usr/local/myclang/bin/llvm-config
-DCMAKE_C_FLAGS="--target=arm-linux-gnueabihf -march=armv7a
--gcc-toolchain=/usr/arm-linux-gnueabihf
--sysroot=/usr/arm-linux-gnueabihf/lib"
> -- The C compiler identification is Clang 8.0.0
> -- The CXX compiler identification is Clang 8.0.0
> -- The ASM compiler identification is unknown
> -- Found assembler: /usr/local/myclang/bin/clang
> -- Check for working C compiler: /usr/local/myclang/bin/clang
> -- Check for working C compiler: /usr/local/myclang/bin/clang -- broken
> CMake Error at /usr/share/cmake-3.10/Modules/CMakeTestCCompiler.cmake:52
(message):
> The C compiler
>
> "/usr/local/myclang/bin/clang"
>
> is not able to compile a simple test program.
>
> It fails with the following output:
>
> Change Dir: /home/llvm_all/buildrtonly/CMakeFiles/CMakeTmp
>
> Run Build Command:"/usr/bin/ninja" "cmTC_22d97"
> [1/2] Building C object CMakeFiles/cmTC_22d97.dir/testCCompiler.c.o
> [2/2] Linking C executable cmTC_22d97
> FAILED: cmTC_22d97
> : && /usr/local/myclang/bin/clang --target=arm-linux-gnueabihf
--target=arm-linux-gnueabihf -march=armv7a
--gcc-toolchain=/usr/arm-linux-gnueabihf --sysroot=/usr/arm-linux-gnueabihf/lib
-fuse-ld=lld CMakeFiles/cmTC_22d97.dir/testCCompiler.c.o -o cmTC_22d97
&& :
> ld.lld: error: cannot open crt1.o: No such file or directory
> ld.lld: error: cannot open crti.o: No such file or directory
> ld.lld: error: cannot open crtbegin.o: No such file or directory
> ld.lld: error: unable to find library -lgcc
> ld.lld: error: unable to find library -lgcc_s
> ld.lld: error: unable to find library -lc
> ld.lld: error: unable to find library -lgcc
> ld.lld: error: unable to find library -lgcc_s
> ld.lld: error: cannot open crtend.o: No such file or directory
> ld.lld: error: cannot open crtn.o: No such file or directory
> clang-8: error: linker command failed with exit code 1 (use -v to see
invocation)
> ninja: build stopped: subcommand failed.
>
> CMake will not be able to correctly generate this project.
> Call Stack (most recent call first):
> CMakeLists.txt:10 (project)
> -- Configuring incomplete, errors occurred!
> See also "/home/llvm_all/buildrtonly/CMakeFiles/CMakeOutput.log".
> See also "/home/llvm_all/buildrtonly/CMakeFiles/CMakeError.log".
>
>
> Note: Googling this error suggested installing gcc-multilib or linking
"sudo ln -s /usr/lib/x86_64-linux-gnu /usr/lib64" (which both did not
fix it). But the crt1.o that lld does not seem to find is probably the one from
arm-linux-gnueabihf, right? "Locate" says it's right in
/usr/arm-linux-gnueabihf/lib.
>
> The instructions to use --gcc-toolchain and --sysroot work well for a
> separate toolchain install directory. They don't seem to work as well
> for a debian multiarch style installation. I think it will be worth
> trying to compile helloworld outside of cmake. If you can get that to
> work then this might help guide us to what flags to use.
>
> On my ubuntu 16.04 machine I've got /usr/arm-linux-gnueabihf and
> /usr/include/arm-linux-gnueabihf and /usr/lib/arm-linux-gnueabihf
> With this configuration the clang linux driver is able to find the
> libraries without the sysroot and gcc-toolchain as it is effectively
> root. Can you try with a simple helloworld program:
> clang --target=arm-linux-gnueabihf hello.c -o hello -fuse-ld=lld
> qemu-arm -L /usr/arm-linux-gnueabihf hello
> If all is well you should see qemu-arm print Hello World. You may need
> to install the package qemu-user if you've not already done so.
>
> With the -v option clang will tell you where it is searching for
> headers and libraries, I've often found that useful in trying to find
> out what is going.
>
> Assuming that this has worked for you can you try removing
> "--gcc-toolchain=/usr/arm-linux-gnueabihf
> --sysroot=/usr/arm-linux-gnueabihf/lib" from your flags in the cmake
> build.
>
> For the errors below it looks like clang is using the default target
> for assembler, note that --target=arm-linux-gnueabihf is missing. I
> have seen that before, and the solution I found was to pass
> -DCMAKE_ASM_FLAGS="same as C flags including
> --target=arm-linux-gnueabihf and -march=armv7a"
>
> Thanks for reporting the problems. If I get time next week I'll have a
> go at improving the documentation.
>
> Peter
>
> Thanks so far!
>
> Christian
>
>
> cmake output with STATIC_LIBRARY:
>
> -- The C compiler identification is Clang 8.0.0
> -- The CXX compiler identification is Clang 8.0.0
> -- The ASM compiler identification is Clang
> -- Found assembler: /usr/local/myclang/bin/clang
> -- Check for working C compiler: /usr/local/myclang/bin/clang
> -- Check for working C compiler: /usr/local/myclang/bin/clang -- works
> -- Detecting C compiler ABI info
> -- Detecting C compiler ABI info - done
> -- Detecting C compile features
> -- Detecting C compile features - done
> -- Check for working CXX compiler: /usr/local/myclang/bin/clang++
> -- Check for working CXX compiler: /usr/local/myclang/bin/clang++ -- works
> -- Detecting CXX compiler ABI info
> -- Detecting CXX compiler ABI info - done
> -- Detecting CXX compile features
> -- Detecting CXX compile features - done
> -- Looking for unwind.h
> -- Looking for unwind.h - found
> -- Found PythonInterp: /usr/bin/python2.7 (found version
"2.7.15")
> -- Looking for fopen in c
> -- Looking for fopen in c - found
> -- Looking for __gcc_personality_v0 in gcc_s
> -- Looking for __gcc_personality_v0 in gcc_s - found
> -- Performing Test COMPILER_RT_HAS_NODEFAULTLIBS_FLAG
> -- Performing Test COMPILER_RT_HAS_NODEFAULTLIBS_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_FFREESTANDING_FLAG
> -- Performing Test COMPILER_RT_HAS_FFREESTANDING_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_FPIC_FLAG
> -- Performing Test COMPILER_RT_HAS_FPIC_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_FPIE_FLAG
> -- Performing Test COMPILER_RT_HAS_FPIE_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_FNO_BUILTIN_FLAG
> -- Performing Test COMPILER_RT_HAS_FNO_BUILTIN_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_FNO_EXCEPTIONS_FLAG
> -- Performing Test COMPILER_RT_HAS_FNO_EXCEPTIONS_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_FOMIT_FRAME_POINTER_FLAG
> -- Performing Test COMPILER_RT_HAS_FOMIT_FRAME_POINTER_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_FUNWIND_TABLES_FLAG
> -- Performing Test COMPILER_RT_HAS_FUNWIND_TABLES_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_FNO_STACK_PROTECTOR_FLAG
> -- Performing Test COMPILER_RT_HAS_FNO_STACK_PROTECTOR_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_FNO_SANITIZE_SAFE_STACK_FLAG
> -- Performing Test COMPILER_RT_HAS_FNO_SANITIZE_SAFE_STACK_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_FVISIBILITY_HIDDEN_FLAG
> -- Performing Test COMPILER_RT_HAS_FVISIBILITY_HIDDEN_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_FRTTI_FLAG
> -- Performing Test COMPILER_RT_HAS_FRTTI_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_FNO_RTTI_FLAG
> -- Performing Test COMPILER_RT_HAS_FNO_RTTI_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_FNO_FUNCTION_SECTIONS_FLAG
> -- Performing Test COMPILER_RT_HAS_FNO_FUNCTION_SECTIONS_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_STD_CXX11_FLAG
> -- Performing Test COMPILER_RT_HAS_STD_CXX11_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_FTLS_MODEL_INITIAL_EXEC
> -- Performing Test COMPILER_RT_HAS_FTLS_MODEL_INITIAL_EXEC - Success
> -- Performing Test COMPILER_RT_HAS_FNO_LTO_FLAG
> -- Performing Test COMPILER_RT_HAS_FNO_LTO_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_MSSE3_FLAG
> -- Performing Test COMPILER_RT_HAS_MSSE3_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_MSSE4_2_FLAG
> -- Performing Test COMPILER_RT_HAS_MSSE4_2_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_SYSROOT_FLAG
> -- Performing Test COMPILER_RT_HAS_SYSROOT_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_MCRC_FLAG
> -- Performing Test COMPILER_RT_HAS_MCRC_FLAG - Failed
> -- Performing Test COMPILER_RT_HAS_FVISIBILITY_INLINES_HIDDEN_FLAG
> -- Performing Test COMPILER_RT_HAS_FVISIBILITY_INLINES_HIDDEN_FLAG -
Success
> -- Performing Test COMPILER_RT_HAS_GR_FLAG
> -- Performing Test COMPILER_RT_HAS_GR_FLAG - Failed
> -- Performing Test COMPILER_RT_HAS_GS_FLAG
> -- Performing Test COMPILER_RT_HAS_GS_FLAG - Failed
> -- Performing Test COMPILER_RT_HAS_MT_FLAG
> -- Performing Test COMPILER_RT_HAS_MT_FLAG - Failed
> -- Performing Test COMPILER_RT_HAS_Oy_FLAG
> -- Performing Test COMPILER_RT_HAS_Oy_FLAG - Failed
> -- Performing Test COMPILER_RT_HAS_GLINE_TABLES_ONLY_FLAG
> -- Performing Test COMPILER_RT_HAS_GLINE_TABLES_ONLY_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_G_FLAG
> -- Performing Test COMPILER_RT_HAS_G_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_Zi_FLAG
> -- Performing Test COMPILER_RT_HAS_Zi_FLAG - Failed
> -- Performing Test COMPILER_RT_HAS_WALL_FLAG
> -- Performing Test COMPILER_RT_HAS_WALL_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_WERROR_FLAG
> -- Performing Test COMPILER_RT_HAS_WERROR_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_WFRAME_LARGER_THAN_FLAG
> -- Performing Test COMPILER_RT_HAS_WFRAME_LARGER_THAN_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_WGLOBAL_CONSTRUCTORS_FLAG
> -- Performing Test COMPILER_RT_HAS_WGLOBAL_CONSTRUCTORS_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_WC99_EXTENSIONS_FLAG
> -- Performing Test COMPILER_RT_HAS_WC99_EXTENSIONS_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_WGNU_FLAG
> -- Performing Test COMPILER_RT_HAS_WGNU_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_WNON_VIRTUAL_DTOR_FLAG
> -- Performing Test COMPILER_RT_HAS_WNON_VIRTUAL_DTOR_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_WVARIADIC_MACROS_FLAG
> -- Performing Test COMPILER_RT_HAS_WVARIADIC_MACROS_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_WUNUSED_PARAMETER_FLAG
> -- Performing Test COMPILER_RT_HAS_WUNUSED_PARAMETER_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_WCOVERED_SWITCH_DEFAULT_FLAG
> -- Performing Test COMPILER_RT_HAS_WCOVERED_SWITCH_DEFAULT_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_W4_FLAG
> -- Performing Test COMPILER_RT_HAS_W4_FLAG - Failed
> -- Performing Test COMPILER_RT_HAS_WX_FLAG
> -- Performing Test COMPILER_RT_HAS_WX_FLAG - Failed
> -- Performing Test COMPILER_RT_HAS_WD4146_FLAG
> -- Performing Test COMPILER_RT_HAS_WD4146_FLAG - Failed
> -- Performing Test COMPILER_RT_HAS_WD4291_FLAG
> -- Performing Test COMPILER_RT_HAS_WD4291_FLAG - Failed
> -- Performing Test COMPILER_RT_HAS_WD4221_FLAG
> -- Performing Test COMPILER_RT_HAS_WD4221_FLAG - Failed
> -- Performing Test COMPILER_RT_HAS_WD4391_FLAG
> -- Performing Test COMPILER_RT_HAS_WD4391_FLAG - Failed
> -- Performing Test COMPILER_RT_HAS_WD4722_FLAG
> -- Performing Test COMPILER_RT_HAS_WD4722_FLAG - Failed
> -- Performing Test COMPILER_RT_HAS_WD4800_FLAG
> -- Performing Test COMPILER_RT_HAS_WD4800_FLAG - Failed
> -- Looking for __func__
> -- Looking for __func__ - found
> -- Looking for dlopen in dl
> -- Looking for dlopen in dl - found
> -- Looking for shm_open in rt
> -- Looking for shm_open in rt - found
> -- Looking for pow in m
> -- Looking for pow in m - found
> -- Looking for pthread_create in pthread
> -- Looking for pthread_create in pthread - found
> -- Looking for setupterm in terminfo
> -- Looking for setupterm in terminfo - found
> -- Looking for __cxa_throw in c++
> -- Looking for __cxa_throw in c++ - found
> -- Looking for __cxa_throw in stdc++
> -- Looking for __cxa_throw in stdc++ - found
> -- Compiler-RT supported architectures: armhf
> -- Performing Test COMPILER_RT_HAS_STD_C11_FLAG
> -- Performing Test COMPILER_RT_HAS_STD_C11_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_VISIBILITY_HIDDEN_FLAG
> -- Performing Test COMPILER_RT_HAS_VISIBILITY_HIDDEN_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_OMIT_FRAME_POINTER_FLAG
> -- Performing Test COMPILER_RT_HAS_OMIT_FRAME_POINTER_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_FREESTANDING_FLAG
> -- Performing Test COMPILER_RT_HAS_FREESTANDING_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_XRAY_COMPILER_FLAG
> -- Performing Test COMPILER_RT_HAS_XRAY_COMPILER_FLAG - Success
> -- Performing Test COMPILER_RT_HAS_ATOMIC_KEYWORD
> -- Performing Test COMPILER_RT_HAS_ATOMIC_KEYWORD - Success
> -- Builtin supported architectures: armhf
> -- Looking for __VFP_FP__
> -- Looking for __VFP_FP__ - found
> -- Configuring done
> -- Generating done
> -- Build files have been written to: /home/llvm_all/buildrtonly
>
> --------------------------------------
>
> ninja output:
>
>
> root at christian-forschung-virtual-machine:/home/llvm_all/buildrtonly#
ninja builtins
>
> [1/207] Building ASM object
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapsi2.S.o
> FAILED:
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapsi2.S.o
> /usr/local/myclang/bin/clang -DVISIBILITY_HIDDEN -fno-lto -std=c11 -fPIC
-fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer
-DCOMPILER_RT_ARMHF_TARGET -MD -MT
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapsi2.S.o -MF
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapsi2.S.o.d -o
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapsi2.S.o -c
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:12:2:
error: unknown directive
> .syntax unified
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:25:3:
error: invalid instruction mnemonic 'eor'
> eor r1, r0, r0, ror #16
> ^~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:26:15:
error: unknown token in expression
> bic r1, r1, #0xff0000
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:27:3:
error: unknown use of instruction mnemonic without a size suffix
> mov r1, r1, lsr #8
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:28:3:
error: invalid instruction mnemonic 'eor'
> eor r0, r1, r0, ror #8
> ^~~
> [2/207] Building ASM object
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapdi2.S.o
> FAILED:
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapdi2.S.o
> /usr/local/myclang/bin/clang -DVISIBILITY_HIDDEN -fno-lto -std=c11 -fPIC
-fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer
-DCOMPILER_RT_ARMHF_TARGET -MD -MT
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapdi2.S.o -MF
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapdi2.S.o.d -o
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapdi2.S.o -c
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:12:2:
error: unknown directive
> .syntax unified
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:26:5:
error: invalid instruction mnemonic 'eor'
> eor r2, r0, r0, ror #16
> ^~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:27:17:
error: unknown token in expression
> bic r2, r2, #0xff0000
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:28:5:
error: unknown use of instruction mnemonic without a size suffix
> mov r2, r2, lsr #8
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:29:5:
error: invalid instruction mnemonic 'eor'
> eor r2, r2, r0, ror #8
> ^~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:31:5:
error: invalid instruction mnemonic 'eor'
> eor r0, r1, r1, ror #16
> ^~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:32:17:
error: unknown token in expression
> bic r0, r0, #0xff0000
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:33:5:
error: unknown use of instruction mnemonic without a size suffix
> mov r0, r0, lsr #8
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:34:5:
error: invalid instruction mnemonic 'eor'
> eor r0, r0, r1, ror #8
> ^~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:39:5:
error: unknown use of instruction mnemonic without a size suffix
> mov r1, r2
> ^
> [3/207] Building ASM object
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/comparesf2.S.o
> FAILED:
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/comparesf2.S.o
> /usr/local/myclang/bin/clang -DVISIBILITY_HIDDEN -fno-lto -std=c11 -fPIC
-fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer
-DCOMPILER_RT_ARMHF_TARGET -MD -MT
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/comparesf2.S.o -MF
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/comparesf2.S.o.d -o
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/comparesf2.S.o -c
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:41:2:
error: unknown directive
> .syntax unified
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:45:1:
error: unexpected token at start of statement
> @ int __eqsf2(float a, float b)
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:50:5:
error: invalid operand for instruction
> vmov r0, s0
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:51:5:
error: invalid operand for instruction
> vmov r1, s1
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:53:5:
error: unknown use of instruction mnemonic without a size suffix
> mov r2, r0, lsl #1
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:54:5:
error: unknown use of instruction mnemonic without a size suffix
> mov r3, r1, lsl #1
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:56:5:
error: invalid instruction mnemonic 'orrs'
> orrs r12, r2, r3, lsr #1
> ^~~~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:58:5:
error: invalid instruction mnemonic 'it'
> it ne
> ^~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:59:5:
error: invalid instruction mnemonic 'eorsne'
> eorsne r12, r0, r1
> ^~~~~~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:61:5:
error: invalid instruction mnemonic 'it'
> it pl
> ^~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:62:5:
error: invalid instruction mnemonic 'subspl'
> subspl r0, r2, r3
> ^~~~~~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:64:5:
error: invalid instruction mnemonic 'it'
> it lo
> ^~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:65:5:
error: invalid instruction mnemonic 'mvnlo'
> mvnlo r0, r1, asr #31
> ^~~~~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:67:5:
error: invalid instruction mnemonic 'it'
> it hi
> ^~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:68:5:
error: invalid instruction mnemonic 'movhi'
> movhi r0, r1, asr #31
> ^~~~~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:70:5:
error: invalid instruction mnemonic 'it'
> it ne
> ^~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:71:19:
error: unknown token in expression
> orrne r0, r0, #1
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:167:13:
error: unknown token in expression
> cmp r2, #0xff000000
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:168:5:
error: invalid instruction mnemonic 'ite'
> ite ls
> ^~~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:169:15:
error: unknown token in expression
> cmpls r3, #0xff000000
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:170:15:
error: unknown token in expression
> movhi r0, #1
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:179:1:
error: unexpected token at start of statement
> @ int __gtsf2(float a, float b)
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:188:5:
error: invalid operand for instruction
> vmov r0, s0
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:189:5:
error: invalid operand for instruction
> vmov r1, s1
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:191:5:
error: unknown use of instruction mnemonic without a size suffix
> mov r2, r0, lsl #1
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:192:5:
error: unknown use of instruction mnemonic without a size suffix
> mov r3, r1, lsl #1
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:193:5:
error: invalid instruction mnemonic 'orrs'
> orrs r12, r2, r3, lsr #1
> ^~~~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:194:5:
error: invalid instruction mnemonic 'it'
> it ne
> ^~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:195:5:
error: invalid instruction mnemonic 'eorsne'
> eorsne r12, r0, r1
> ^~~~~~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:196:5:
error: invalid instruction mnemonic 'it'
> it pl
> ^~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:197:5:
error: invalid instruction mnemonic 'subspl'
> subspl r0, r2, r3
> ^~~~~~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:198:5:
error: invalid instruction mnemonic 'it'
> it lo
> ^~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:199:5:
error: invalid instruction mnemonic 'mvnlo'
> mvnlo r0, r1, asr #31
> ^~~~~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:200:5:
error: invalid instruction mnemonic 'it'
> it hi
> ^~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:201:5:
error: invalid instruction mnemonic 'movhi'
> movhi r0, r1, asr #31
> ^~~~~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:202:5:
error: invalid instruction mnemonic 'it'
> it ne
> ^~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:203:19:
error: unknown token in expression
> orrne r0, r0, #1
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:204:13:
error: unknown token in expression
> cmp r2, #0xff000000
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:205:5:
error: invalid instruction mnemonic 'ite'
> ite ls
> ^~~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:206:15:
error: unknown token in expression
> cmpls r3, #0xff000000
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:207:15:
error: unknown token in expression
> movhi r0, #-1
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:214:1:
error: unexpected token at start of statement
> @ int __unordsf2(float a, float b)
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:220:5:
error: invalid operand for instruction
> vmov r0, s0
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:221:5:
error: invalid operand for instruction
> vmov r1, s1
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:224:18:
error: unknown token in expression
> lsls r2, r0, #1
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:225:18:
error: unknown token in expression
> lsls r3, r1, #1
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:226:14:
error: unknown token in expression
> movs r0, #0
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:277:13:
error: unknown token in expression
> cmp r2, #0xff000000
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:278:5:
error: invalid instruction mnemonic 'ite'
> ite ls
> ^~~
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:279:15:
error: unknown token in expression
> cmpls r3, #0xff000000
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:280:15:
error: unknown token in expression
> movhi r0, #1
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:287:2:
error: invalid operand for instruction
> vmov s0, r0
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:288:2:
error: invalid operand for instruction
> vmov s1, r1
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:289:2:
error: invalid instruction mnemonic 'b'
> b __unordsf2
> ^
> [4/207] Building ASM object
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzsi2.S.o
> FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzsi2.S.o
> /usr/local/myclang/bin/clang -DVISIBILITY_HIDDEN -fno-lto -std=c11 -fPIC
-fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer
-DCOMPILER_RT_ARMHF_TARGET -MD -MT
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzsi2.S.o -MF
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzsi2.S.o.d -o
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzsi2.S.o -c
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:16:2:
error: unknown directive
> .syntax unified
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:33:2:
error: unknown use of instruction mnemonic without a size suffix
> mov r1, 1
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:2:
error: invalid instruction mnemonic 'lsrs'
> lsrs r2, r0, 16; movne r0, r2; addeq r1, 16
> ^~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:19:
error: invalid instruction mnemonic 'movne'
> lsrs r2, r0, 16; movne r0, r2; addeq r1, 16
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:33:
error: invalid instruction mnemonic 'addeq'
> lsrs r2, r0, 16; movne r0, r2; addeq r1, 16
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:36:2:
error: invalid instruction mnemonic 'lsrs'
> lsrs r2, r0, 8; movne r0, r2; addeq r1, 8
> ^~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:36:18:
error: invalid instruction mnemonic 'movne'
> lsrs r2, r0, 8; movne r0, r2; addeq r1, 8
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:36:32:
error: invalid instruction mnemonic 'addeq'
> lsrs r2, r0, 8; movne r0, r2; addeq r1, 8
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:37:2:
error: invalid instruction mnemonic 'lsrs'
> lsrs r2, r0, 4; movne r0, r2; addeq r1, 4
> ^~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:37:18:
error: invalid instruction mnemonic 'movne'
> lsrs r2, r0, 4; movne r0, r2; addeq r1, 4
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:37:32:
error: invalid instruction mnemonic 'addeq'
> lsrs r2, r0, 4; movne r0, r2; addeq r1, 4
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:38:2:
error: invalid instruction mnemonic 'lsrs'
> lsrs r2, r0, 2; movne r0, r2; addeq r1, 2
> ^~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:38:18:
error: invalid instruction mnemonic 'movne'
> lsrs r2, r0, 2; movne r0, r2; addeq r1, 2
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:38:32:
error: invalid instruction mnemonic 'addeq'
> lsrs r2, r0, 2; movne r0, r2; addeq r1, 2
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:40:2:
error: unknown use of instruction mnemonic without a size suffix
> sub r0, r1, r0, lsr #1
> ^
> [5/207] Building ASM object
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzdi2.S.o
> FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzdi2.S.o
> /usr/local/myclang/bin/clang -DVISIBILITY_HIDDEN -fno-lto -std=c11 -fPIC
-fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer
-DCOMPILER_RT_ARMHF_TARGET -MD -MT
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzdi2.S.o -MF
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzdi2.S.o.d -o
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzdi2.S.o -c
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:16:2:
error: unknown directive
> .syntax unified
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:50:2:
error: unknown use of instruction mnemonic without a size suffix
> cmp r1, 0
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:51:2:
error: invalid instruction mnemonic 'movne'
> movne r0, r1
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:53:2:
error: invalid instruction mnemonic 'movne'
> movne r1, 1
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:54:2:
error: invalid instruction mnemonic 'moveq'
> moveq r1, 33
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:56:2:
error: invalid instruction mnemonic 'lsrs'
> lsrs r2, r0, 16; movne r0, r2; addeq r1, 16
> ^~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:56:19:
error: invalid instruction mnemonic 'movne'
> lsrs r2, r0, 16; movne r0, r2; addeq r1, 16
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:56:33:
error: invalid instruction mnemonic 'addeq'
> lsrs r2, r0, 16; movne r0, r2; addeq r1, 16
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:57:2:
error: invalid instruction mnemonic 'lsrs'
> lsrs r2, r0, 8; movne r0, r2; addeq r1, 8
> ^~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:57:18:
error: invalid instruction mnemonic 'movne'
> lsrs r2, r0, 8; movne r0, r2; addeq r1, 8
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:57:32:
error: invalid instruction mnemonic 'addeq'
> lsrs r2, r0, 8; movne r0, r2; addeq r1, 8
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:58:2:
error: invalid instruction mnemonic 'lsrs'
> lsrs r2, r0, 4; movne r0, r2; addeq r1, 4
> ^~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:58:18:
error: invalid instruction mnemonic 'movne'
> lsrs r2, r0, 4; movne r0, r2; addeq r1, 4
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:58:32:
error: invalid instruction mnemonic 'addeq'
> lsrs r2, r0, 4; movne r0, r2; addeq r1, 4
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:59:2:
error: invalid instruction mnemonic 'lsrs'
> lsrs r2, r0, 2; movne r0, r2; addeq r1, 2
> ^~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:59:18:
error: invalid instruction mnemonic 'movne'
> lsrs r2, r0, 2; movne r0, r2; addeq r1, 2
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:59:32:
error: invalid instruction mnemonic 'addeq'
> lsrs r2, r0, 2; movne r0, r2; addeq r1, 2
> ^~~~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:61:2:
error: unknown use of instruction mnemonic without a size suffix
> sub r0, r1, r0, lsr #1
> ^
> [6/207] Building ASM object
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/divmodsi4.S.o
> FAILED:
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/divmodsi4.S.o
> /usr/local/myclang/bin/clang -DVISIBILITY_HIDDEN -fno-lto -std=c11 -fPIC
-fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer
-DCOMPILER_RT_ARMHF_TARGET -MD -MT
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/divmodsi4.S.o -MF
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/divmodsi4.S.o.d -o
lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/divmodsi4.S.o -c
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:24:2:
error: unknown directive
> .syntax unified
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:28:1:
error: unexpected token at start of statement
> @ int __divmodsi4(int divident, int divisor, int *remainder)
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:29:1:
error: unexpected token at start of statement
> @ Calculate the quotient and remainder of the (signed) division. The return
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:30:1:
error: unexpected token at start of statement
> @ value is the quotient, the remainder is placed in the variable.
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:46:11:
error: Invalid rounding mode.
> push {r4-r7, lr} ; add r7, sp, #12
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:46:36:
error: unknown token in expression
> push {r4-r7, lr} ; add r7, sp, #12
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:49:5:
error: invalid instruction mnemonic 'eor'
> eor r4, r0, r1
> ^~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:50:5:
error: unknown use of instruction mnemonic without a size suffix
> mov r5, r0
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:51:5:
error: unknown use of instruction mnemonic without a size suffix
> mov r6, r2
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:53:5:
error: invalid instruction mnemonic 'eor'
> eor ip, r0, r0, asr #31
> ^~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:54:5:
error: invalid instruction mnemonic 'eor'
> eor lr, r1, r1, asr #31
> ^~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:55:5:
error: unknown use of instruction mnemonic without a size suffix
> sub r0, ip, r0, asr #31
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:56:5:
error: unknown use of instruction mnemonic without a size suffix
> sub r1, lr, r1, asr #31
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:58:5:
error: invalid instruction mnemonic 'bl'
> bl __udivmodsi4
> ^~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:60:5:
error: invalid instruction mnemonic 'ldr'
> ldr r1, [r6]
> ^~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:61:5:
error: invalid instruction mnemonic 'eor'
> eor r0, r0, r4, asr #31
> ^~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:62:5:
error: invalid instruction mnemonic 'eor'
> eor r1, r1, r5, asr #31
> ^~~
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:63:5:
error: unknown use of instruction mnemonic without a size suffix
> sub r0, r0, r4, asr #31
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:64:5:
error: unknown use of instruction mnemonic without a size suffix
> sub r1, r1, r5, asr #31
> ^
> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:65:5:
error: unknown use of instruction mnemonic without a size suffix
> str r1, [r6]
> ^
>
/home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:66:10:
error: Invalid rounding mode.
> pop {r4-r7, pc}
>
>
>
>
>
>
>
>
>
>
>
> On 04.12.2018 15:54, Peter Smith via llvm-dev wrote:
>
> Hello,
>
> Just a few quick observations.
> - It looks like you may have downloaded the linux arm toolchain. For bare
metal you probably wanted the Arm embedded toolchain,
https://developer.arm.com/open-source/gnu-toolchain/gnu-rm
> -- That toolchain will have newlib rather than glibc, I don't know
whether it will have one pre-compiled for v4 though. If not you may have to find
an older toolchain or build newlib youtself.
> - The bare-metal driver in clang (arm-none-eabi) is not multilib aware and
won't put the paths to the libraries on the link line, the -L flag
> -- I have found that following the samples in the gnu embedded toolchain
with gcc using the -v flag to get the paths it is using, then use these with
lld.
>
> If you can let us know what problems you are seeing building compiler-rt
then we may be able to help. I'm not sure there is anyone building it for
arm v4 so you may be hitting new problems. I'm away at a conference today
and tomorrow but I can try later in the week.
>
> Peter
>
> On Tue, 4 Dec 2018 at 12:21, cscheuer via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
>
> I am currently trying to compile a pretty simple program to work on an
> experimental board. It contains an (FPGA-version of) an ARMv4 processor.
> So basically, I try this (on my Ubuntu 18.04.1 LTS):
> clang -v --target=arm-none-eabi -c barehello.c -o barehelloCLANG.o
> clang -v --target=arm-none-eabi -c io.c -o io.o
> clang -v --target=arm-none-eabi barehelloCLANG.o io.o -o
> helloCLANGstatic -static -fuse-ld=lld
>
> Which results in
>
> clang version 8.0.0 (https://git.llvm.org/git/clang.git/
> a152c7a4b7ba8f4cb9532ead9a38a7121db43d50)
> (https://git.llvm.org/git/llvm.git/
> 1959ce6f3e01241919968ac1911fd45660239d23)
> Target: arm-none-unknown-eabi
> Thread model: posix
> InstalledDir: /usr/local/my_clang/bin
> "/usr/local/my_clang/bin/ld.lld" barehelloCLANG.o io.o -Bstatic
> -L/usr/local/my_clang/lib/clang/8.0.0/lib/baremetal -lc -lm
> -lclang_rt.builtins-arm.a -o helloCLANGstatic
> ld.lld: error: unable to find library -lc
> ld.lld: error: unable to find library -lm
> ld.lld: error: unable to find library -lclang_rt.builtins-arm.a
> clang-8: error: ld.lld command failed with exit code 1 (use -v to see
> invocation)
>
> on the linking part. I downloaded a sysroot from
>
https://developer.arm.com/open-source/gnu-toolchain/gnu-a/downloads/8-2-2018-08
> and tried to include it via --sysroot=/my/path/to/it, but clang acted
> unimpressed with the same errors. So I'm missing
clang_rt.builtins-arm.a
> I guess, but that does not exist on my system.
> So next, I tried basically every version of "how to cross-compile
> llvm/clang/compiler-rt" That google came up with, but was not able to
> get a single one to actually work. Any ideas how to get this running?
> Thanks in advance!
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
>
>
Peter Smith via llvm-dev
2018-Dec-14 17:28 UTC
[llvm-dev] Compiling for baremetal ARMv4 on Ubuntu Linux
Hello again Christian, I've posted https://reviews.llvm.org/D55709 to see if we can get the documentation on how to cross-compile compiler-rt improved. I'll be out of office until next year so I may be a bit slow to respond to any follow ups. Peter On Thu, 13 Dec 2018 at 17:10, Peter Smith <peter.smith at linaro.org> wrote:> > Hello Christian, > > I've just retried the runtimes way of building for v6m, v7m and v7e-m > . My cmake command was > ARMEABIGCC=/path/to/gcceabi/arm-none-eabi > cmake \ > -G Ninja\ > -DBAREMETAL_ARMV6M_SYSROOT=${ARMEABIGCC}\ > -DBAREMETAL_ARMV7M_SYSROOT=${ARMEABIGCC}\ > -DBAREMETAL_ARMV7EM_SYSROOT=${ARMEABIGCC}\ > -DCMAKE_BUILD_TYPE=Release\ > -C/path/to/llvm/tools/clang/cmake/caches/BaremetalARM.cmake \ > /path/to/llvm > > The cache file requires clang and lld. From the build directory they > will go into lib/clang. That worked for me (TM). Hopefully if you can > edit the paths it will work for you. My guess is that you'll want to > set ARMEABIGCC=/home/crichter/Downloads/gcc-arm-none-eabi-5_4-2016q3/arm-none-eabi > > Peter > > On Thu, 13 Dec 2018 at 12:08, Christian Richter > <christian.richter at hsu-hh.de> wrote: > > > > Hello Peter and Lists, > > > > thanks a lot, that way it worked out! The final cmake was > > > > cmake -G "Ninja" ../llvm/projects/compiler-rt/ -DCOMPILER_RT_BUILD_BUILTINS=ON -DCOMPILER_RT_BUILD_SANITIZERS=OFF -DCOMPILER_RT_BUILD_XRAY=OFF -DCOMPILER_RT_BUILD_LIBFUZZER=OFF -DCOMPILER_RT_BUILD_PROFILE=OFF -DCMAKE_C_COMPILER=/usr/local/myclang/bin/clang -DCMAKE_AR=/usr/local/myclang/bin/llvm-ar -DCMAKE_NM=/usr/local/myclang/bin/llvm-nm -DCMAKE_RANLIB=/usr/local/myclang/bin/llvm-ranlib -DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY -DCMAKE_C_COMPILER_TARGET="arm-linux-gnueabihf" -DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON -DLLVM_CONFIG_PATH=/usr/local/myclang/bin/llvm-config -DCMAKE_ASM_FLAGS="--target=arm-linux-gnueabihf -march=armv7a --gcc-toolchain=/home/crichter/arm-linux-gnueabihf/gcc-arm --sysroot=/home/crichter/arm-linux-gnueabihf/sysroot-glibc/" -DCMAKE_C_FLAGS="--target=arm-linux-gnueabihf -march=armv7a --gcc-toolchain=/home/crichter/arm-linux-gnueabihf/gcc-arm --sysroot=/home/crichter/arm-linux-gnueabihf/sysroot-glibc/" > > > > where sysroot-glibc/ contains sysroot-glibc-8.2-x86_64 and /arm-linux-gnueabihf/gcc-arm contains gcc-arm-8.2 for Aarch32 hard float from https://developer.arm.com/open-source/gnu-toolchain/gnu-a/downloads. This resulted in successfully building libclang_rt.builtins-armhf.a > > > > So next, I tried to use the cmake recipe for BaremetalARM as in the documentation. Therefore, I moved the compiler-rt directory from llvm/projects to llvm/runtimes. I downloaded the latest updates of gcc-arm-none-eabi6/7/8 from https://developer.arm.com/open-source/gnu-toolchain/gnu-rm/downloads and tried to build in a new directory. But whether I gave the -C the path to BaremetalARM.cmake's directory or the file itself, nothing started. I was unsure whether to keep the paths to llvm-ar, llvm-nm and so on as well and whether or not to give the new compiler-rt-directory or the whole llvm-directory as a starting point. Am I using the wrong build directory here? Is this still "Ninja"? The error message (see below) is true: /home/llvm_4rt/llvm/tools/clang/cmake/caches contains no CMakeLists.txt, just the BaremetalARM.cmake among other recipes. Giving -C the file directly just leads to a "this is a file, not a directory" error. > > > > This is (one of my) cmake commands: > > > > root at christian-forschung-virtual-machine:/home/llvm_4rt/buildrecipe# cmake -G "Ninja" ../llvm/runtimes/compiler-rt -DCOMPILER_RT_BUILD_BUILTINS=ON -DCOMPILER_RT_BUILD_SANITIZERS=OFF -DCOMPILER_RT_BUILD_XRAY=OFF -DCOMPILER_RT_BUILD_LIBFUZZER=OFF -DCOMPILER_RT_BUILD_PROFILE=OFF -DCMAKE_C_COMPILER=/usr/local/myclang/bin/clang -DCMAKE_AR=/usr/local/myclang/bin/llvm-ar -DCMAKE_NM=/usr/local/myclang/bin/llvm-nm -DCMAKE_RANLIB=/usr/local/myclang/bin/llvm-ranlib -DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY -DCMAKE_C_COMPILER_TARGET="arm-linux-gnueabihf" -DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON -DLLVM_CONFIG_PATH=/usr/local/myclang/bin/llvm-config -DBAREMETAL_ARMV5M_SYSROOT=/home/crichter/Downloads/gcc-arm-none-eabi-5_4-2016q3 > > -DBAREMETAL_ARMV6M_SYSROOT=/home/crichter/Downloads/gcc-arm-none-eabi-6-2017-q2-update -DBAREMETAL_ARMV7M_SYSROOT=/home/crichter/Downloads/gcc-arm-none-eabi-7-2018-q2-update -C /home/llvm_4rt/llvm/tools/clang/cmake/caches > > > > loading initial cache file /home/llvm_4rt/llvm/tools/clang/cmake/caches > > CMake Error: Error processing file: /home/llvm_4rt/llvm/tools/clang/cmake/caches > > CMake Error: The source directory "/home/llvm_4rt/llvm/tools/clang/cmake/caches" does not appear to contain CMakeLists.txt. > > Specify --help for usage, or press the help button on the CMake GUI. > > > > So I'm obviously using it wrong, would appreciate any pointers in the right direction! > > Christian > > > > > > On 10.12.2018 17:59, Peter Smith wrote: > > > > Hello Christian, > > > > Yes it does look like clang will add /usr/local/include unless > > --nostdinc is used, although that will mean skipping a lot of other > > include directories that clang will implicitly add based on the > > target. I can think of a couple of ways to proceed: > > 1.) use -nostdinc and add in the directories you need manually > > 2.) use a cross gcc toolchain in a different directory such as one > > from (https://developer.arm.com/open-source/gnu-toolchain/gnu-a/downloads) > > and use --gcc-toolchain and --sysroot. > > > > I must admit I've only ever done 2.) myself as I've wanted to make > > sure I've not inadvertently depended on something on my machine. > > > > Apologies for the confusion. > > > > Peter > > > > On Mon, 10 Dec 2018 at 16:05, Christian Richter > > <christian.richter at hsu-hh.de> wrote: > > > > Hello again! > > > > Tried out the small Hello World Setup, worked as intended: > > > > root at christian-forschung-virtual-machine:/home/progs# clang -v --target=arm-linux-gnueabihf hello.c -o hello -fuse-ld=lld > > clang version 8.0.0 (https://git.llvm.org/git/clang.git/ a152c7a4b7ba8f4cb9532ead9a38a7121db43d50) (https://git.llvm.org/git/llvm.git/ 1959ce6f3e01241919968ac1911fd45660239d23) > > Target: arm-unknown-linux-gnueabihf > > Thread model: posix > > InstalledDir: /usr/local/myclang/bin > > Found candidate GCC installation: /usr/lib/gcc-cross/arm-linux-gnueabihf/7 > > Found candidate GCC installation: /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0 > > Selected GCC installation: /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0 > > Candidate multilib: .;@m32 > > Selected multilib: .;@m32 > > "/usr/local/myclang/bin/clang-8" -cc1 -triple armv6kz-unknown-linux-gnueabihf -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -discard-value-names -main-file-name hello.c -mrelocation-model static -mthread-model posix -mdisable-fp-elim -fmath-errno -masm-verbose -mconstructor-aliases -fuse-init-array -target-cpu arm1176jzf-s -target-feature +strict-align -target-abi aapcs-linux -mfloat-abi hard -fallow-half-arguments-and-returns -dwarf-column-info -debugger-tuning=gdb -v -resource-dir /usr/local/myclang/lib/clang/8.0.0 -internal-isystem /usr/local/include -internal-isystem /usr/local/myclang/lib/clang/8.0.0/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdebug-compilation-dir /home/progs -ferror-limit 19 -fmessage-length 202 -fno-signed-char -fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-diagnostics -o /tmp/hello-98a3a7.o -x c hello.c -faddrsig > > clang -cc1 version 8.0.0 based upon LLVM 8.0.0svn default target x86_64-unknown-linux-gnu > > ignoring nonexistent directory "/include" > > #include "..." search starts here: > > #include <...> search starts here: > > /usr/local/include > > /usr/local/myclang/lib/clang/8.0.0/include > > /usr/include > > End of search list. > > "/usr/local/myclang/bin/ld.lld" -EL -z relro -X --hash-style=gnu --eh-frame-hdr -m armelf_linux_eabi -dynamic-linker /lib/ld-linux-armhf.so.3 -o hello /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib/../lib/crt1.o /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib/../lib/crti.o /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/crtbegin.o -L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0 -L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib/../lib -L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../lib -L/usr/local/myclang/bin/../lib -L/lib/../lib -L/usr/lib/../lib -L/usr/lib/arm-linux-gnueabihf/../../lib -L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib -L/usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../.. -L/usr/local/myclang/bin/../lib -L/lib -L/usr/lib /tmp/hello-98a3a7.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/crtend.o /usr/lib/gcc-cross/arm-linux-gnueabihf/7.3.0/../../../../arm-linux-gnueabihf/lib/../lib/crtn.o > > > > root at christian-forschung-virtual-machine:/home/progs# qemu-arm -L /usr/arm-linux-gnueabihf hello > > > > Hello, World! > > > > So far, so good. The Paths written more readable seem to be > > > > /usr/local/myclang/lib, /lib, /usr/lib, /usr/arm-linux-gnueabihf/lib, so no surprised there. > > > > Then I added the suggested -DCMAKE_ASM_FLAGS to the cmake for the standalone compiler-rt build while leaving out the --sysroot and --gcc-toolchain: > > > > cmake -G "Ninja" ../llvm/projects/compiler-rt/ -DCOMPILER_RT_BUILD_BUILTINS=ON -DCOMPILER_RT_BUILD_SANITIZERS=OFF -DCOMPILER_RT_BUILD_XRAY=OFF -DCOMPILER_RT_BUILD_LIBFUZZER=OFF -DCOMPILER_RT_BUILD_PROFILE=OFF -DCMAKE_C_COMPILER=/usr/local/myclang/bin/clang -DCMAKE_AR=/usr/local/myclang/bin/llvm-ar -DCMAKE_NM=/usr/local/myclang/bin/llvm-nm -DCMAKE_RANLIB=/usr/local/myclang/bin/llvm-ranlib -DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY -DCMAKE_C_COMPILER_TARGET="arm-linux-gnueabihf" -DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON -DLLVM_CONFIG_PATH=/usr/local/myclang/bin/llvm-config -DCMAKE_ASM_FLAGS="--target=arm-linux-gnueabihf -march=armv7a" -DCMAKE_C_FLAGS="--target=arm-linux-gnueabihf -march=armv7a" > > > > now "ninja builtins" at least starts working, but fails after a while (see below). The error seems similar to http://lists.llvm.org/pipermail/llvm-dev/2011-September/043289.html to me, so it might still be some variant of the problem from before: Using a x86-header where an ARM one would be needed. > > > > The ninja builtins output: > > > > root at christian-forschung-virtual-machine:/home/llvm_all/buildrtonly# ninja builtins > > [147/207] Building C object lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/emutls.c.o > > FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/emutls.c.o > > /usr/local/myclang/bin/clang --target=arm-linux-gnueabihf -DVISIBILITY_HIDDEN --target=arm-linux-gnueabihf -march=armv7a -Wall -Wno-unused-parameter -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILER_RT_ARMHF_TARGET -MD -MT lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/emutls.c.o -MF lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/emutls.c.o.d -o lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/emutls.c.o -c /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/emutls.c > > In file included from /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/emutls.c:41: > > /usr/include/pthread.h:682:6: error: 'regparm' is not valid on this platform > > __cleanup_fct_attribute; > > ^~~~~~~~~~~~~~~~~~~~~~~ > > /usr/include/bits/pthreadtypes-arch.h:103:50: note: expanded from macro '__cleanup_fct_attribute' > > # define __cleanup_fct_attribute __attribute__ ((__regparm__ (1))) > > ^ ~ > > In file included from /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/emutls.c:41: > > /usr/include/pthread.h:694:3: error: 'regparm' is not valid on this platform > > __cleanup_fct_attribute; > > ^~~~~~~~~~~~~~~~~~~~~~~ > > /usr/include/bits/pthreadtypes-arch.h:103:50: note: expanded from macro '__cleanup_fct_attribute' > > # define __cleanup_fct_attribute __attribute__ ((__regparm__ (1))) > > ^ ~ > > In file included from /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/emutls.c:41: > > /usr/include/pthread.h:735:6: error: 'regparm' is not valid on this platform > > __cleanup_fct_attribute __attribute__ ((__noreturn__)) > > ^~~~~~~~~~~~~~~~~~~~~~~ > > /usr/include/bits/pthreadtypes-arch.h:103:50: note: expanded from macro '__cleanup_fct_attribute' > > # define __cleanup_fct_attribute __attribute__ ((__regparm__ (1))) > > ^ ~ > > 3 errors generated. > > [148/207] Building C object lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/gcc_personality_v0.c.o > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:148:47: warning: declaration of 'struct _Unwind_Exception' will not be visible outside of this function [-Wvisibility] > > _Unwind_Reason_Code __gnu_unwind_frame(struct _Unwind_Exception *, > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:153:23: warning: declaration of 'struct _Unwind_Exception' will not be visible outside of this function [-Wvisibility] > > continueUnwind(struct _Unwind_Exception *exceptionObject, > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:160:28: warning: incompatible pointer types passing 'struct _Unwind_Exception *' to parameter of type 'struct _Unwind_Exception *' [-Wincompatible-pointer-types] > > if (__gnu_unwind_frame(exceptionObject, context) != _URC_OK) > > ^~~~~~~~~~~~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:148:66: note: passing argument to parameter here > > _Unwind_Reason_Code __gnu_unwind_frame(struct _Unwind_Exception *, > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:184:38: warning: declaration of 'struct _Unwind_Exception' will not be visible outside of this function [-Wvisibility] > > _Unwind_State state, struct _Unwind_Exception *exceptionObject, > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:202:31: warning: incompatible pointer types passing 'struct _Unwind_Exception *' to parameter of type 'struct _Unwind_Exception *' [-Wincompatible-pointer-types] > > return continueUnwind(exceptionObject, context); > > ^~~~~~~~~~~~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:153:42: note: passing argument to parameter 'exceptionObject' here > > continueUnwind(struct _Unwind_Exception *exceptionObject, > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:207:31: warning: incompatible pointer types passing 'struct _Unwind_Exception *' to parameter of type 'struct _Unwind_Exception *' [-Wincompatible-pointer-types] > > return continueUnwind(exceptionObject, context); > > ^~~~~~~~~~~~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:153:42: note: passing argument to parameter 'exceptionObject' here > > continueUnwind(struct _Unwind_Exception *exceptionObject, > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:250:27: warning: incompatible pointer types passing 'struct _Unwind_Exception *' to parameter of type 'struct _Unwind_Exception *' [-Wincompatible-pointer-types] > > return continueUnwind(exceptionObject, context); > > ^~~~~~~~~~~~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/gcc_personality_v0.c:153:42: note: passing argument to parameter 'exceptionObject' here > > continueUnwind(struct _Unwind_Exception *exceptionObject, > > ^ > > 7 warnings generated. > > [152/207] Building ASM object lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/aeabi_cdcmp.S.o > > ninja: build stopped: subcommand failed. > > > > Almost there! Thanks in advance! > > > > Christian > > > > > > > > On 07.12.2018 17:40, Peter Smith wrote: > > > > Hello Christian, > > > > I've put some comments inline > > > > On Fri, 7 Dec 2018 at 15:48, Christian Richter via llvm-dev > > <llvm-dev at lists.llvm.org> wrote: > > > > Hello, > > > > on the problems cross-building compiler-rt: Tried to follow https://llvm.org/docs/HowToCrossCompileBuiltinsOnArm.html which lead to this cmake: > > > > cmake -G "Ninja" ../llvm/projects/compiler-rt/ -DCOMPILER_RT_BUILD_BUILTINS=ON -DCOMPILER_RT_BUILD_SANITIZERS=OFF -DCOMPILER_RT_BUILD_XRAY=OFF -DCOMPILER_RT_BUILD_LIBFUZZER=OFF -DCOMPILER_RT_BUILD_PROFILE=OFF -DCMAKE_C_COMPILER=/usr/local/myclang/bin/clang -DCMAKE_AR=/usr/local/myclang/bin/llvm-ar -DCMAKE_NM=/usr/local/myclang/bin/llvm-nm -DCMAKE_RANLIB=/usr/local/myclang/bin/llvm-ranlib -DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY -DCMAKE_C_COMPILER_TARGET="arm-linux-gnueabihf" -DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON -DLLVM_CONFIG_PATH=/usr/local/myclang/bin/llvm-config -DCMAKE_C_FLAGS="--target=arm-linux-gnueabihf -march=armv7a --gcc-toolchain=/usr/arm-linux-gnueabihf --sysroot=/usr/arm-linux-gnueabihf/lib" > > > > Some small notes: > > > > - Used -DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY instead of -DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld" as Peter Smith suggested because it actually is a library and therefore does not need to be linked. If I do not change that, the cmake does not work (see below). > > > > - used -G "Ninja" although not explicitly stated in the tutorial as they use "ninja builtins" next. > > > > - had to change --march=armv7a to -march=armv7a as clang did not accept the first one. > > > > the cmake was successful, but the ninja builtins was not (see both outputs below). Am I doing the --gcc-toolchain / --sysroot part right? These are just the places where the result of "apt install arm-linux-gnueabihf" lives. > > > > cmake output with -DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld": > > > > Thanks for the comments. I will try and revisit that document next > > week and will post an update. > > > > root at christian-forschung-virtual-machine:/home/llvm_all/buildrtonly# cmake -G "Ninja" ../llvm/projects/compiler-rt/ -DCOMPILER_RT_BUILD_BUILTINS=ON -DCOMPILER_RT_BUILD_SANITIZERS=OFF -DCOMPILER_RT_BUILD_XRAY=OFF -DCOMPILER_RT_BUILD_LIBFUZZER=OFF -DCOMPILER_RT_BUILD_PROFILE=OFF -DCMAKE_C_COMPILER=/usr/local/myclang/bin/clang -DCMAKE_AR=/usr/local/myclang/bin/llvm-ar -DCMAKE_NM=/usr/local/myclang/bin/llvm-nm -DCMAKE_RANLIB=/usr/local/myclang/bin/llvm-ranlib -DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld" -DCMAKE_C_COMPILER_TARGET="arm-linux-gnueabihf" -DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON -DLLVM_CONFIG_PATH=/usr/local/myclang/bin/llvm-config -DCMAKE_C_FLAGS="--target=arm-linux-gnueabihf -march=armv7a --gcc-toolchain=/usr/arm-linux-gnueabihf --sysroot=/usr/arm-linux-gnueabihf/lib" > > -- The C compiler identification is Clang 8.0.0 > > -- The CXX compiler identification is Clang 8.0.0 > > -- The ASM compiler identification is unknown > > -- Found assembler: /usr/local/myclang/bin/clang > > -- Check for working C compiler: /usr/local/myclang/bin/clang > > -- Check for working C compiler: /usr/local/myclang/bin/clang -- broken > > CMake Error at /usr/share/cmake-3.10/Modules/CMakeTestCCompiler.cmake:52 (message): > > The C compiler > > > > "/usr/local/myclang/bin/clang" > > > > is not able to compile a simple test program. > > > > It fails with the following output: > > > > Change Dir: /home/llvm_all/buildrtonly/CMakeFiles/CMakeTmp > > > > Run Build Command:"/usr/bin/ninja" "cmTC_22d97" > > [1/2] Building C object CMakeFiles/cmTC_22d97.dir/testCCompiler.c.o > > [2/2] Linking C executable cmTC_22d97 > > FAILED: cmTC_22d97 > > : && /usr/local/myclang/bin/clang --target=arm-linux-gnueabihf --target=arm-linux-gnueabihf -march=armv7a --gcc-toolchain=/usr/arm-linux-gnueabihf --sysroot=/usr/arm-linux-gnueabihf/lib -fuse-ld=lld CMakeFiles/cmTC_22d97.dir/testCCompiler.c.o -o cmTC_22d97 && : > > ld.lld: error: cannot open crt1.o: No such file or directory > > ld.lld: error: cannot open crti.o: No such file or directory > > ld.lld: error: cannot open crtbegin.o: No such file or directory > > ld.lld: error: unable to find library -lgcc > > ld.lld: error: unable to find library -lgcc_s > > ld.lld: error: unable to find library -lc > > ld.lld: error: unable to find library -lgcc > > ld.lld: error: unable to find library -lgcc_s > > ld.lld: error: cannot open crtend.o: No such file or directory > > ld.lld: error: cannot open crtn.o: No such file or directory > > clang-8: error: linker command failed with exit code 1 (use -v to see invocation) > > ninja: build stopped: subcommand failed. > > > > CMake will not be able to correctly generate this project. > > Call Stack (most recent call first): > > CMakeLists.txt:10 (project) > > -- Configuring incomplete, errors occurred! > > See also "/home/llvm_all/buildrtonly/CMakeFiles/CMakeOutput.log". > > See also "/home/llvm_all/buildrtonly/CMakeFiles/CMakeError.log". > > > > > > Note: Googling this error suggested installing gcc-multilib or linking "sudo ln -s /usr/lib/x86_64-linux-gnu /usr/lib64" (which both did not fix it). But the crt1.o that lld does not seem to find is probably the one from arm-linux-gnueabihf, right? "Locate" says it's right in /usr/arm-linux-gnueabihf/lib. > > > > The instructions to use --gcc-toolchain and --sysroot work well for a > > separate toolchain install directory. They don't seem to work as well > > for a debian multiarch style installation. I think it will be worth > > trying to compile helloworld outside of cmake. If you can get that to > > work then this might help guide us to what flags to use. > > > > On my ubuntu 16.04 machine I've got /usr/arm-linux-gnueabihf and > > /usr/include/arm-linux-gnueabihf and /usr/lib/arm-linux-gnueabihf > > With this configuration the clang linux driver is able to find the > > libraries without the sysroot and gcc-toolchain as it is effectively > > root. Can you try with a simple helloworld program: > > clang --target=arm-linux-gnueabihf hello.c -o hello -fuse-ld=lld > > qemu-arm -L /usr/arm-linux-gnueabihf hello > > If all is well you should see qemu-arm print Hello World. You may need > > to install the package qemu-user if you've not already done so. > > > > With the -v option clang will tell you where it is searching for > > headers and libraries, I've often found that useful in trying to find > > out what is going. > > > > Assuming that this has worked for you can you try removing > > "--gcc-toolchain=/usr/arm-linux-gnueabihf > > --sysroot=/usr/arm-linux-gnueabihf/lib" from your flags in the cmake > > build. > > > > For the errors below it looks like clang is using the default target > > for assembler, note that --target=arm-linux-gnueabihf is missing. I > > have seen that before, and the solution I found was to pass > > -DCMAKE_ASM_FLAGS="same as C flags including > > --target=arm-linux-gnueabihf and -march=armv7a" > > > > Thanks for reporting the problems. If I get time next week I'll have a > > go at improving the documentation. > > > > Peter > > > > Thanks so far! > > > > Christian > > > > > > cmake output with STATIC_LIBRARY: > > > > -- The C compiler identification is Clang 8.0.0 > > -- The CXX compiler identification is Clang 8.0.0 > > -- The ASM compiler identification is Clang > > -- Found assembler: /usr/local/myclang/bin/clang > > -- Check for working C compiler: /usr/local/myclang/bin/clang > > -- Check for working C compiler: /usr/local/myclang/bin/clang -- works > > -- Detecting C compiler ABI info > > -- Detecting C compiler ABI info - done > > -- Detecting C compile features > > -- Detecting C compile features - done > > -- Check for working CXX compiler: /usr/local/myclang/bin/clang++ > > -- Check for working CXX compiler: /usr/local/myclang/bin/clang++ -- works > > -- Detecting CXX compiler ABI info > > -- Detecting CXX compiler ABI info - done > > -- Detecting CXX compile features > > -- Detecting CXX compile features - done > > -- Looking for unwind.h > > -- Looking for unwind.h - found > > -- Found PythonInterp: /usr/bin/python2.7 (found version "2.7.15") > > -- Looking for fopen in c > > -- Looking for fopen in c - found > > -- Looking for __gcc_personality_v0 in gcc_s > > -- Looking for __gcc_personality_v0 in gcc_s - found > > -- Performing Test COMPILER_RT_HAS_NODEFAULTLIBS_FLAG > > -- Performing Test COMPILER_RT_HAS_NODEFAULTLIBS_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_FFREESTANDING_FLAG > > -- Performing Test COMPILER_RT_HAS_FFREESTANDING_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_FPIC_FLAG > > -- Performing Test COMPILER_RT_HAS_FPIC_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_FPIE_FLAG > > -- Performing Test COMPILER_RT_HAS_FPIE_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_FNO_BUILTIN_FLAG > > -- Performing Test COMPILER_RT_HAS_FNO_BUILTIN_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_FNO_EXCEPTIONS_FLAG > > -- Performing Test COMPILER_RT_HAS_FNO_EXCEPTIONS_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_FOMIT_FRAME_POINTER_FLAG > > -- Performing Test COMPILER_RT_HAS_FOMIT_FRAME_POINTER_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_FUNWIND_TABLES_FLAG > > -- Performing Test COMPILER_RT_HAS_FUNWIND_TABLES_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_FNO_STACK_PROTECTOR_FLAG > > -- Performing Test COMPILER_RT_HAS_FNO_STACK_PROTECTOR_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_FNO_SANITIZE_SAFE_STACK_FLAG > > -- Performing Test COMPILER_RT_HAS_FNO_SANITIZE_SAFE_STACK_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_FVISIBILITY_HIDDEN_FLAG > > -- Performing Test COMPILER_RT_HAS_FVISIBILITY_HIDDEN_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_FRTTI_FLAG > > -- Performing Test COMPILER_RT_HAS_FRTTI_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_FNO_RTTI_FLAG > > -- Performing Test COMPILER_RT_HAS_FNO_RTTI_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_FNO_FUNCTION_SECTIONS_FLAG > > -- Performing Test COMPILER_RT_HAS_FNO_FUNCTION_SECTIONS_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_STD_CXX11_FLAG > > -- Performing Test COMPILER_RT_HAS_STD_CXX11_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_FTLS_MODEL_INITIAL_EXEC > > -- Performing Test COMPILER_RT_HAS_FTLS_MODEL_INITIAL_EXEC - Success > > -- Performing Test COMPILER_RT_HAS_FNO_LTO_FLAG > > -- Performing Test COMPILER_RT_HAS_FNO_LTO_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_MSSE3_FLAG > > -- Performing Test COMPILER_RT_HAS_MSSE3_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_MSSE4_2_FLAG > > -- Performing Test COMPILER_RT_HAS_MSSE4_2_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_SYSROOT_FLAG > > -- Performing Test COMPILER_RT_HAS_SYSROOT_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_MCRC_FLAG > > -- Performing Test COMPILER_RT_HAS_MCRC_FLAG - Failed > > -- Performing Test COMPILER_RT_HAS_FVISIBILITY_INLINES_HIDDEN_FLAG > > -- Performing Test COMPILER_RT_HAS_FVISIBILITY_INLINES_HIDDEN_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_GR_FLAG > > -- Performing Test COMPILER_RT_HAS_GR_FLAG - Failed > > -- Performing Test COMPILER_RT_HAS_GS_FLAG > > -- Performing Test COMPILER_RT_HAS_GS_FLAG - Failed > > -- Performing Test COMPILER_RT_HAS_MT_FLAG > > -- Performing Test COMPILER_RT_HAS_MT_FLAG - Failed > > -- Performing Test COMPILER_RT_HAS_Oy_FLAG > > -- Performing Test COMPILER_RT_HAS_Oy_FLAG - Failed > > -- Performing Test COMPILER_RT_HAS_GLINE_TABLES_ONLY_FLAG > > -- Performing Test COMPILER_RT_HAS_GLINE_TABLES_ONLY_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_G_FLAG > > -- Performing Test COMPILER_RT_HAS_G_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_Zi_FLAG > > -- Performing Test COMPILER_RT_HAS_Zi_FLAG - Failed > > -- Performing Test COMPILER_RT_HAS_WALL_FLAG > > -- Performing Test COMPILER_RT_HAS_WALL_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_WERROR_FLAG > > -- Performing Test COMPILER_RT_HAS_WERROR_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_WFRAME_LARGER_THAN_FLAG > > -- Performing Test COMPILER_RT_HAS_WFRAME_LARGER_THAN_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_WGLOBAL_CONSTRUCTORS_FLAG > > -- Performing Test COMPILER_RT_HAS_WGLOBAL_CONSTRUCTORS_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_WC99_EXTENSIONS_FLAG > > -- Performing Test COMPILER_RT_HAS_WC99_EXTENSIONS_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_WGNU_FLAG > > -- Performing Test COMPILER_RT_HAS_WGNU_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_WNON_VIRTUAL_DTOR_FLAG > > -- Performing Test COMPILER_RT_HAS_WNON_VIRTUAL_DTOR_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_WVARIADIC_MACROS_FLAG > > -- Performing Test COMPILER_RT_HAS_WVARIADIC_MACROS_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_WUNUSED_PARAMETER_FLAG > > -- Performing Test COMPILER_RT_HAS_WUNUSED_PARAMETER_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_WCOVERED_SWITCH_DEFAULT_FLAG > > -- Performing Test COMPILER_RT_HAS_WCOVERED_SWITCH_DEFAULT_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_W4_FLAG > > -- Performing Test COMPILER_RT_HAS_W4_FLAG - Failed > > -- Performing Test COMPILER_RT_HAS_WX_FLAG > > -- Performing Test COMPILER_RT_HAS_WX_FLAG - Failed > > -- Performing Test COMPILER_RT_HAS_WD4146_FLAG > > -- Performing Test COMPILER_RT_HAS_WD4146_FLAG - Failed > > -- Performing Test COMPILER_RT_HAS_WD4291_FLAG > > -- Performing Test COMPILER_RT_HAS_WD4291_FLAG - Failed > > -- Performing Test COMPILER_RT_HAS_WD4221_FLAG > > -- Performing Test COMPILER_RT_HAS_WD4221_FLAG - Failed > > -- Performing Test COMPILER_RT_HAS_WD4391_FLAG > > -- Performing Test COMPILER_RT_HAS_WD4391_FLAG - Failed > > -- Performing Test COMPILER_RT_HAS_WD4722_FLAG > > -- Performing Test COMPILER_RT_HAS_WD4722_FLAG - Failed > > -- Performing Test COMPILER_RT_HAS_WD4800_FLAG > > -- Performing Test COMPILER_RT_HAS_WD4800_FLAG - Failed > > -- Looking for __func__ > > -- Looking for __func__ - found > > -- Looking for dlopen in dl > > -- Looking for dlopen in dl - found > > -- Looking for shm_open in rt > > -- Looking for shm_open in rt - found > > -- Looking for pow in m > > -- Looking for pow in m - found > > -- Looking for pthread_create in pthread > > -- Looking for pthread_create in pthread - found > > -- Looking for setupterm in terminfo > > -- Looking for setupterm in terminfo - found > > -- Looking for __cxa_throw in c++ > > -- Looking for __cxa_throw in c++ - found > > -- Looking for __cxa_throw in stdc++ > > -- Looking for __cxa_throw in stdc++ - found > > -- Compiler-RT supported architectures: armhf > > -- Performing Test COMPILER_RT_HAS_STD_C11_FLAG > > -- Performing Test COMPILER_RT_HAS_STD_C11_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_VISIBILITY_HIDDEN_FLAG > > -- Performing Test COMPILER_RT_HAS_VISIBILITY_HIDDEN_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_OMIT_FRAME_POINTER_FLAG > > -- Performing Test COMPILER_RT_HAS_OMIT_FRAME_POINTER_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_FREESTANDING_FLAG > > -- Performing Test COMPILER_RT_HAS_FREESTANDING_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_XRAY_COMPILER_FLAG > > -- Performing Test COMPILER_RT_HAS_XRAY_COMPILER_FLAG - Success > > -- Performing Test COMPILER_RT_HAS_ATOMIC_KEYWORD > > -- Performing Test COMPILER_RT_HAS_ATOMIC_KEYWORD - Success > > -- Builtin supported architectures: armhf > > -- Looking for __VFP_FP__ > > -- Looking for __VFP_FP__ - found > > -- Configuring done > > -- Generating done > > -- Build files have been written to: /home/llvm_all/buildrtonly > > > > -------------------------------------- > > > > ninja output: > > > > > > root at christian-forschung-virtual-machine:/home/llvm_all/buildrtonly# ninja builtins > > > > [1/207] Building ASM object lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapsi2.S.o > > FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapsi2.S.o > > /usr/local/myclang/bin/clang -DVISIBILITY_HIDDEN -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILER_RT_ARMHF_TARGET -MD -MT lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapsi2.S.o -MF lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapsi2.S.o.d -o lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapsi2.S.o -c /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:12:2: error: unknown directive > > .syntax unified > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:25:3: error: invalid instruction mnemonic 'eor' > > eor r1, r0, r0, ror #16 > > ^~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:26:15: error: unknown token in expression > > bic r1, r1, #0xff0000 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:27:3: error: unknown use of instruction mnemonic without a size suffix > > mov r1, r1, lsr #8 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapsi2.S:28:3: error: invalid instruction mnemonic 'eor' > > eor r0, r1, r0, ror #8 > > ^~~ > > [2/207] Building ASM object lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapdi2.S.o > > FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapdi2.S.o > > /usr/local/myclang/bin/clang -DVISIBILITY_HIDDEN -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILER_RT_ARMHF_TARGET -MD -MT lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapdi2.S.o -MF lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapdi2.S.o.d -o lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/bswapdi2.S.o -c /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:12:2: error: unknown directive > > .syntax unified > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:26:5: error: invalid instruction mnemonic 'eor' > > eor r2, r0, r0, ror #16 > > ^~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:27:17: error: unknown token in expression > > bic r2, r2, #0xff0000 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:28:5: error: unknown use of instruction mnemonic without a size suffix > > mov r2, r2, lsr #8 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:29:5: error: invalid instruction mnemonic 'eor' > > eor r2, r2, r0, ror #8 > > ^~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:31:5: error: invalid instruction mnemonic 'eor' > > eor r0, r1, r1, ror #16 > > ^~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:32:17: error: unknown token in expression > > bic r0, r0, #0xff0000 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:33:5: error: unknown use of instruction mnemonic without a size suffix > > mov r0, r0, lsr #8 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:34:5: error: invalid instruction mnemonic 'eor' > > eor r0, r0, r1, ror #8 > > ^~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/bswapdi2.S:39:5: error: unknown use of instruction mnemonic without a size suffix > > mov r1, r2 > > ^ > > [3/207] Building ASM object lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/comparesf2.S.o > > FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/comparesf2.S.o > > /usr/local/myclang/bin/clang -DVISIBILITY_HIDDEN -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILER_RT_ARMHF_TARGET -MD -MT lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/comparesf2.S.o -MF lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/comparesf2.S.o.d -o lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/comparesf2.S.o -c /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:41:2: error: unknown directive > > .syntax unified > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:45:1: error: unexpected token at start of statement > > @ int __eqsf2(float a, float b) > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:50:5: error: invalid operand for instruction > > vmov r0, s0 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:51:5: error: invalid operand for instruction > > vmov r1, s1 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:53:5: error: unknown use of instruction mnemonic without a size suffix > > mov r2, r0, lsl #1 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:54:5: error: unknown use of instruction mnemonic without a size suffix > > mov r3, r1, lsl #1 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:56:5: error: invalid instruction mnemonic 'orrs' > > orrs r12, r2, r3, lsr #1 > > ^~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:58:5: error: invalid instruction mnemonic 'it' > > it ne > > ^~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:59:5: error: invalid instruction mnemonic 'eorsne' > > eorsne r12, r0, r1 > > ^~~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:61:5: error: invalid instruction mnemonic 'it' > > it pl > > ^~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:62:5: error: invalid instruction mnemonic 'subspl' > > subspl r0, r2, r3 > > ^~~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:64:5: error: invalid instruction mnemonic 'it' > > it lo > > ^~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:65:5: error: invalid instruction mnemonic 'mvnlo' > > mvnlo r0, r1, asr #31 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:67:5: error: invalid instruction mnemonic 'it' > > it hi > > ^~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:68:5: error: invalid instruction mnemonic 'movhi' > > movhi r0, r1, asr #31 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:70:5: error: invalid instruction mnemonic 'it' > > it ne > > ^~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:71:19: error: unknown token in expression > > orrne r0, r0, #1 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:167:13: error: unknown token in expression > > cmp r2, #0xff000000 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:168:5: error: invalid instruction mnemonic 'ite' > > ite ls > > ^~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:169:15: error: unknown token in expression > > cmpls r3, #0xff000000 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:170:15: error: unknown token in expression > > movhi r0, #1 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:179:1: error: unexpected token at start of statement > > @ int __gtsf2(float a, float b) > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:188:5: error: invalid operand for instruction > > vmov r0, s0 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:189:5: error: invalid operand for instruction > > vmov r1, s1 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:191:5: error: unknown use of instruction mnemonic without a size suffix > > mov r2, r0, lsl #1 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:192:5: error: unknown use of instruction mnemonic without a size suffix > > mov r3, r1, lsl #1 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:193:5: error: invalid instruction mnemonic 'orrs' > > orrs r12, r2, r3, lsr #1 > > ^~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:194:5: error: invalid instruction mnemonic 'it' > > it ne > > ^~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:195:5: error: invalid instruction mnemonic 'eorsne' > > eorsne r12, r0, r1 > > ^~~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:196:5: error: invalid instruction mnemonic 'it' > > it pl > > ^~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:197:5: error: invalid instruction mnemonic 'subspl' > > subspl r0, r2, r3 > > ^~~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:198:5: error: invalid instruction mnemonic 'it' > > it lo > > ^~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:199:5: error: invalid instruction mnemonic 'mvnlo' > > mvnlo r0, r1, asr #31 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:200:5: error: invalid instruction mnemonic 'it' > > it hi > > ^~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:201:5: error: invalid instruction mnemonic 'movhi' > > movhi r0, r1, asr #31 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:202:5: error: invalid instruction mnemonic 'it' > > it ne > > ^~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:203:19: error: unknown token in expression > > orrne r0, r0, #1 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:204:13: error: unknown token in expression > > cmp r2, #0xff000000 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:205:5: error: invalid instruction mnemonic 'ite' > > ite ls > > ^~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:206:15: error: unknown token in expression > > cmpls r3, #0xff000000 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:207:15: error: unknown token in expression > > movhi r0, #-1 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:214:1: error: unexpected token at start of statement > > @ int __unordsf2(float a, float b) > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:220:5: error: invalid operand for instruction > > vmov r0, s0 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:221:5: error: invalid operand for instruction > > vmov r1, s1 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:224:18: error: unknown token in expression > > lsls r2, r0, #1 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:225:18: error: unknown token in expression > > lsls r3, r1, #1 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:226:14: error: unknown token in expression > > movs r0, #0 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:277:13: error: unknown token in expression > > cmp r2, #0xff000000 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:278:5: error: invalid instruction mnemonic 'ite' > > ite ls > > ^~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:279:15: error: unknown token in expression > > cmpls r3, #0xff000000 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:280:15: error: unknown token in expression > > movhi r0, #1 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:287:2: error: invalid operand for instruction > > vmov s0, r0 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:288:2: error: invalid operand for instruction > > vmov s1, r1 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/comparesf2.S:289:2: error: invalid instruction mnemonic 'b' > > b __unordsf2 > > ^ > > [4/207] Building ASM object lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzsi2.S.o > > FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzsi2.S.o > > /usr/local/myclang/bin/clang -DVISIBILITY_HIDDEN -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILER_RT_ARMHF_TARGET -MD -MT lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzsi2.S.o -MF lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzsi2.S.o.d -o lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzsi2.S.o -c /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:16:2: error: unknown directive > > .syntax unified > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:33:2: error: unknown use of instruction mnemonic without a size suffix > > mov r1, 1 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:2: error: invalid instruction mnemonic 'lsrs' > > lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > > ^~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:19: error: invalid instruction mnemonic 'movne' > > lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:33: error: invalid instruction mnemonic 'addeq' > > lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:36:2: error: invalid instruction mnemonic 'lsrs' > > lsrs r2, r0, 8; movne r0, r2; addeq r1, 8 > > ^~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:36:18: error: invalid instruction mnemonic 'movne' > > lsrs r2, r0, 8; movne r0, r2; addeq r1, 8 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:36:32: error: invalid instruction mnemonic 'addeq' > > lsrs r2, r0, 8; movne r0, r2; addeq r1, 8 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:37:2: error: invalid instruction mnemonic 'lsrs' > > lsrs r2, r0, 4; movne r0, r2; addeq r1, 4 > > ^~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:37:18: error: invalid instruction mnemonic 'movne' > > lsrs r2, r0, 4; movne r0, r2; addeq r1, 4 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:37:32: error: invalid instruction mnemonic 'addeq' > > lsrs r2, r0, 4; movne r0, r2; addeq r1, 4 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:38:2: error: invalid instruction mnemonic 'lsrs' > > lsrs r2, r0, 2; movne r0, r2; addeq r1, 2 > > ^~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:38:18: error: invalid instruction mnemonic 'movne' > > lsrs r2, r0, 2; movne r0, r2; addeq r1, 2 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:38:32: error: invalid instruction mnemonic 'addeq' > > lsrs r2, r0, 2; movne r0, r2; addeq r1, 2 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:40:2: error: unknown use of instruction mnemonic without a size suffix > > sub r0, r1, r0, lsr #1 > > ^ > > [5/207] Building ASM object lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzdi2.S.o > > FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzdi2.S.o > > /usr/local/myclang/bin/clang -DVISIBILITY_HIDDEN -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILER_RT_ARMHF_TARGET -MD -MT lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzdi2.S.o -MF lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzdi2.S.o.d -o lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/clzdi2.S.o -c /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:16:2: error: unknown directive > > .syntax unified > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:50:2: error: unknown use of instruction mnemonic without a size suffix > > cmp r1, 0 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:51:2: error: invalid instruction mnemonic 'movne' > > movne r0, r1 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:53:2: error: invalid instruction mnemonic 'movne' > > movne r1, 1 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:54:2: error: invalid instruction mnemonic 'moveq' > > moveq r1, 33 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:56:2: error: invalid instruction mnemonic 'lsrs' > > lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > > ^~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:56:19: error: invalid instruction mnemonic 'movne' > > lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:56:33: error: invalid instruction mnemonic 'addeq' > > lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:57:2: error: invalid instruction mnemonic 'lsrs' > > lsrs r2, r0, 8; movne r0, r2; addeq r1, 8 > > ^~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:57:18: error: invalid instruction mnemonic 'movne' > > lsrs r2, r0, 8; movne r0, r2; addeq r1, 8 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:57:32: error: invalid instruction mnemonic 'addeq' > > lsrs r2, r0, 8; movne r0, r2; addeq r1, 8 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:58:2: error: invalid instruction mnemonic 'lsrs' > > lsrs r2, r0, 4; movne r0, r2; addeq r1, 4 > > ^~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:58:18: error: invalid instruction mnemonic 'movne' > > lsrs r2, r0, 4; movne r0, r2; addeq r1, 4 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:58:32: error: invalid instruction mnemonic 'addeq' > > lsrs r2, r0, 4; movne r0, r2; addeq r1, 4 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:59:2: error: invalid instruction mnemonic 'lsrs' > > lsrs r2, r0, 2; movne r0, r2; addeq r1, 2 > > ^~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:59:18: error: invalid instruction mnemonic 'movne' > > lsrs r2, r0, 2; movne r0, r2; addeq r1, 2 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:59:32: error: invalid instruction mnemonic 'addeq' > > lsrs r2, r0, 2; movne r0, r2; addeq r1, 2 > > ^~~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzdi2.S:61:2: error: unknown use of instruction mnemonic without a size suffix > > sub r0, r1, r0, lsr #1 > > ^ > > [6/207] Building ASM object lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/divmodsi4.S.o > > FAILED: lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/divmodsi4.S.o > > /usr/local/myclang/bin/clang -DVISIBILITY_HIDDEN -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -fomit-frame-pointer -DCOMPILER_RT_ARMHF_TARGET -MD -MT lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/divmodsi4.S.o -MF lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/divmodsi4.S.o.d -o lib/builtins/CMakeFiles/clang_rt.builtins-armhf.dir/arm/divmodsi4.S.o -c /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:24:2: error: unknown directive > > .syntax unified > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:28:1: error: unexpected token at start of statement > > @ int __divmodsi4(int divident, int divisor, int *remainder) > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:29:1: error: unexpected token at start of statement > > @ Calculate the quotient and remainder of the (signed) division. The return > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:30:1: error: unexpected token at start of statement > > @ value is the quotient, the remainder is placed in the variable. > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:46:11: error: Invalid rounding mode. > > push {r4-r7, lr} ; add r7, sp, #12 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:46:36: error: unknown token in expression > > push {r4-r7, lr} ; add r7, sp, #12 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:49:5: error: invalid instruction mnemonic 'eor' > > eor r4, r0, r1 > > ^~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:50:5: error: unknown use of instruction mnemonic without a size suffix > > mov r5, r0 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:51:5: error: unknown use of instruction mnemonic without a size suffix > > mov r6, r2 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:53:5: error: invalid instruction mnemonic 'eor' > > eor ip, r0, r0, asr #31 > > ^~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:54:5: error: invalid instruction mnemonic 'eor' > > eor lr, r1, r1, asr #31 > > ^~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:55:5: error: unknown use of instruction mnemonic without a size suffix > > sub r0, ip, r0, asr #31 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:56:5: error: unknown use of instruction mnemonic without a size suffix > > sub r1, lr, r1, asr #31 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:58:5: error: invalid instruction mnemonic 'bl' > > bl __udivmodsi4 > > ^~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:60:5: error: invalid instruction mnemonic 'ldr' > > ldr r1, [r6] > > ^~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:61:5: error: invalid instruction mnemonic 'eor' > > eor r0, r0, r4, asr #31 > > ^~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:62:5: error: invalid instruction mnemonic 'eor' > > eor r1, r1, r5, asr #31 > > ^~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:63:5: error: unknown use of instruction mnemonic without a size suffix > > sub r0, r0, r4, asr #31 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:64:5: error: unknown use of instruction mnemonic without a size suffix > > sub r1, r1, r5, asr #31 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:65:5: error: unknown use of instruction mnemonic without a size suffix > > str r1, [r6] > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/divmodsi4.S:66:10: error: Invalid rounding mode. > > pop {r4-r7, pc} > > > > > > > > > > > > > > > > > > > > > > > > On 04.12.2018 15:54, Peter Smith via llvm-dev wrote: > > > > Hello, > > > > Just a few quick observations. > > - It looks like you may have downloaded the linux arm toolchain. For bare metal you probably wanted the Arm embedded toolchain, https://developer.arm.com/open-source/gnu-toolchain/gnu-rm > > -- That toolchain will have newlib rather than glibc, I don't know whether it will have one pre-compiled for v4 though. If not you may have to find an older toolchain or build newlib youtself. > > - The bare-metal driver in clang (arm-none-eabi) is not multilib aware and won't put the paths to the libraries on the link line, the -L flag > > -- I have found that following the samples in the gnu embedded toolchain with gcc using the -v flag to get the paths it is using, then use these with lld. > > > > If you can let us know what problems you are seeing building compiler-rt then we may be able to help. I'm not sure there is anyone building it for arm v4 so you may be hitting new problems. I'm away at a conference today and tomorrow but I can try later in the week. > > > > Peter > > > > On Tue, 4 Dec 2018 at 12:21, cscheuer via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > > > I am currently trying to compile a pretty simple program to work on an > > experimental board. It contains an (FPGA-version of) an ARMv4 processor. > > So basically, I try this (on my Ubuntu 18.04.1 LTS): > > clang -v --target=arm-none-eabi -c barehello.c -o barehelloCLANG.o > > clang -v --target=arm-none-eabi -c io.c -o io.o > > clang -v --target=arm-none-eabi barehelloCLANG.o io.o -o > > helloCLANGstatic -static -fuse-ld=lld > > > > Which results in > > > > clang version 8.0.0 (https://git.llvm.org/git/clang.git/ > > a152c7a4b7ba8f4cb9532ead9a38a7121db43d50) > > (https://git.llvm.org/git/llvm.git/ > > 1959ce6f3e01241919968ac1911fd45660239d23) > > Target: arm-none-unknown-eabi > > Thread model: posix > > InstalledDir: /usr/local/my_clang/bin > > "/usr/local/my_clang/bin/ld.lld" barehelloCLANG.o io.o -Bstatic > > -L/usr/local/my_clang/lib/clang/8.0.0/lib/baremetal -lc -lm > > -lclang_rt.builtins-arm.a -o helloCLANGstatic > > ld.lld: error: unable to find library -lc > > ld.lld: error: unable to find library -lm > > ld.lld: error: unable to find library -lclang_rt.builtins-arm.a > > clang-8: error: ld.lld command failed with exit code 1 (use -v to see > > invocation) > > > > on the linking part. I downloaded a sysroot from > > https://developer.arm.com/open-source/gnu-toolchain/gnu-a/downloads/8-2-2018-08 > > and tried to include it via --sysroot=/my/path/to/it, but clang acted > > unimpressed with the same errors. So I'm missing clang_rt.builtins-arm.a > > I guess, but that does not exist on my system. > > So next, I tried basically every version of "how to cross-compile > > llvm/clang/compiler-rt" That google came up with, but was not able to > > get a single one to actually work. Any ideas how to get this running? > > Thanks in advance! > > _______________________________________________ > > LLVM Developers mailing list > > llvm-dev at lists.llvm.org > > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev > > > > > > _______________________________________________ > > LLVM Developers mailing list > > llvm-dev at lists.llvm.org > > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev > > > > > > _______________________________________________ > > LLVM Developers mailing list > > llvm-dev at lists.llvm.org > > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev > > > > > >