search for: howtocrosscompilebuiltinsonarm

...and -lclang_rt.builtins-arm.a I think either --nostdlib or --nodefaultlibs will do that. You'll need to tell clang where to find these in your arm-none-eabi toolchain. > > > To generate the library, I tried generating builtins by following the guide at: > > https://llvm.org/docs/HowToCrossCompileBuiltinsOnArm.html > > I tried with different configurations, but each one ends up in some > > error which left me wondering that this document might be obsolete. > > I'd hope the information in there isn't completely obsolete, but I haven't tried the build for over a year so it may...

...-eabi*, but for clang_rt.builtins-arm.a (which I thought should've been built with LLVM build but I couldn't find that library in my build directory) I tried building it from LLVM source. To generate the library, I tried generating builtins by following the guide at: https://llvm.org/docs/HowToCrossCompileBuiltinsOnArm.html I tried with different configurations, but each one ends up in some error which left me wondering that this document might be obsolete. Anyhow googling things led me to this thread. http://llvm.1065342.n5.nabble.com/llvm-dev-Compiling-for-baremetal-ARMv4-on-Ubuntu-Linux-td124226.html After...

Hello, I want to build LLVM/Compiler-rt for baremetal targets like Cortex-M3. By adopting CMake options from http://llvm.1065342.n5.nabble.com/llvm-dev-Compiling-for-baremetal-ARMv4-on-Ubuntu-Linux-tp124226p124500.html, I can only build "libclang_rt.builtins-x86_64.a" in lib/linux, but what I want to build is "libclang_rt.builtins.arm.a". My CMake options are: cmake -G Ninja

Hi, I am new to CLANG/LLVM and wish to use it to cross compile an application for an arm target. I was able to get this to work for a small test application, but only after I pointed clang at the gcc toolchain source I was formerly using by providing --sysroot and -I arguments - otherwise, I was getting undefined header file errors. It seems a bit odd that given CLANG is intended to be a gcc

Hi Peter I guess this is the document written by you https://fosdem.org/2018/schedule/event/crosscompile/attachments/slides/2107/export/events/attachments/crosscompile/slides/2107/How_to_cross_compile_with_LLVM_based_tools.pdf I follow it to try to use the clang to do cross compilation. Actually, my target binaries is SPECCPU2006 and autotools based binaries. However, I failed on the first

...#39;t fix the -lclang_rt.builtins-armv6m.a . To get clang_rt.builtins-armv6m.a you will need to cross compile compiler-rt for v6m and copy it to /usr/local/myclang/lib/clang/8.0.0/lib/baremetal . Beware that building compiler-rt for v6m does need quite a bit of fighting cmake (https://llvm.org/docs/HowToCrossCompileBuiltinsOnArm.html). Your alternative if you already have a libgcc.a is to use --nostdlib or --nodefaultlibs to stop the driver adding -lm -lc -lclang_rt.builtins-armv6m.a , although you'll need to add your c library (and possibly math library) yourself in that case. I don't understand the part about __...

...g_rt.builtins-armv6m.a . To get clang_rt.builtins-armv6m.a you > will need to cross compile compiler-rt for v6m and copy it to > /usr/local/myclang/lib/clang/8.0.0/lib/baremetal . Beware that > building compiler-rt for v6m does need quite a bit of fighting cmake > (https://llvm.org/docs/HowToCrossCompileBuiltinsOnArm.html). Your > alternative if you already have a libgcc.a is to use --nostdlib or > --nodefaultlibs to stop the driver adding -lm -lc > -lclang_rt.builtins-armv6m.a , although you'll need to add your c > library (and possibly math library) yourself in that case. > > I don't...

...t. > So basically, the compiler does not use/find the given libraries, but > after trying a lot of variations of the above with the same result I > can't figure out why. > /home/llvm_all/buildrecipe/lib/clang/8.0.0/armv6m-none-eabi is what the > recipe from https://llvm.org/docs/HowToCrossCompileBuiltinsOnArm.html > gave me and is empty except for clang_rt.builtins-armv6.a. Do I still > need to use the sysroot for baremetal arm in addition or do the > compiler-rt suffice? Once more thanks in advance for any hint or help! > Yes you'll still need to use a sysroot for bare metal Arm. The c...

...> 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...

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/c...

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

...> 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/m...

...t; >> 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/m...