[LLVMdev] make error building llvm/clang 3.2 on Linux

Duncan Sands
Tue, 26 Feb 2013 08:57:25 -0000

Hi Michael, you don't need compiler-rt to use clang.  If you don't need
it, I
suggest you don't bother building it.

Ciao, Duncan.

On 21/02/13 01:15, Michael Young wrote:
>
> I'm attempting to build a native build of clang from the 3.2 source
> distribution tarballs, but I ran into this build error that's got me
> really puzzled.  My platform is Linux - 32-bit Ubuntu (12.04) running
> on a PC.  Here's the (abbreviated) output from make:
>
> ***************************************
>     ...
> make[3]: Entering directory
`/home/youngmj/DevTools/LLVM/Version_3.2/build/tools/clang/runtime'
> make[4]: Entering directory
`/home/youngmj/DevTools/LLVM/Version_3.2/build/tools/clang/runtime/compiler-rt'
> make[5]: Entering directory
`/home/youngmj/DevTools/LLVM/Version_3.2/source/compiler-rt-3.2.src'
>    MKDIR:
/home/youngmj/DevTools/LLVM/Version_3.2/build/tools/clang/runtime/compiler-rt/clang_linux/full-i386/i386/SubDir.lib
>    COMPILE:   clang_linux/full-i386/i386:
/home/youngmj/DevTools/LLVM/Version_3.2/source/llvm-3.2.src/projects/compiler-rt/lib/absvdi2.c
>   <* SNIP *>
>    COMPILE:   clang_linux/full-i386/i386:
/home/youngmj/DevTools/LLVM/Version_3.2/source/llvm-3.2.src/projects/compiler-rt/lib/divxc3.c
>    COMPILE:   clang_linux/full-i386/i386:
/home/youngmj/DevTools/LLVM/Version_3.2/source/llvm-3.2.src/projects/compiler-rt/lib/enable_execute_stack.c
> In file included from
/home/youngmj/DevTools/LLVM/Version_3.2/source/llvm-3.2.src/projects/compiler-rt/lib/enable_execute_stack.c:13:
> /usr/include/i386-linux-gnu/sys/mman.h:23:10: fatal error:
'features.h' file not found
> #include <features.h>
>           ^
> 1 error generated.
>      ...
> ***************************************
>
> [Note: I created a symlink from <LLVM_SRC_DIR>/projects/compiler-rt
to
> the directory created by unpacking the tarball source for compiler-rt
> (which is located on the same level as <LLVM_SRC_DIR> and has a
suffix
> of "-3.2.src" in the name), so that's why the directory names
may look
> a little funny.]
>
> Running "gcc -x c -E -v -" gives me the following:
>
> ***************************************
> $ gcc -xc -E -v -
> Using built-in specs.
> COLLECT_GCC=gcc
> COLLECT_LTO_WRAPPER=/usr/lib/gcc/i686-linux-gnu/4.6/lto-wrapper
> Target: i686-linux-gnu
> Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.6.3-1ubuntu5' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.6 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object
--enable-plugin --enable-objc-gc --enable-targets=all --disable-werror
--with-arch-32=i686 --with-tune=generic --enable-checking=release
--build=i686-linux-gnu --host=i686-linux-gnu --target=i686-linux-gnu
> Thread model: posix
> gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
> COLLECT_GCC_OPTIONS='-E' '-v' '-mtune=generic'
'-march=i686'
>   /usr/lib/gcc/i686-linux-gnu/4.6/cc1 -E -quiet -v -imultilib . -imultiarch
i386-linux-gnu - -mtune=generic -march=i686 -fstack-protector
> ignoring nonexistent directory
"/usr/local/include/i386-linux-gnu"
> ignoring nonexistent directory
"/usr/lib/gcc/i686-linux-gnu/4.6/../../../../i686-linux-gnu/include"
> ignoring duplicate directory "/usr/include/i386-linux-gnu"
> #include "..." search starts here:
> #include <...> search starts here:
>   /usr/include/i386-linux-gnu
>   /usr/lib/gcc/i686-linux-gnu/4.6/include
>   /usr/local/include
>   /usr/lib/gcc/i686-linux-gnu/4.6/include-fixed
>   /usr/include
> End of search list.
> # 1 "<stdin>"
> # 1 "<built-in>"
> # 1 "<command-line>"
> # 1 "<stdin>"
>
COMPILER_PATH=/usr/lib/gcc/i686-linux-gnu/4.6/:/usr/lib/gcc/i686-linux-gnu/4.6/:/usr/lib/gcc/i686-linux-gnu/:/usr/lib/gcc/i686-linux-gnu/4.6/:/usr/lib/gcc/i686-linux-gnu/
>
LIBRARY_PATH=/usr/lib/gcc/i686-linux-gnu/4.6/:/usr/lib/gcc/i686-linux-gnu/4.6/../../../i386-linux-gnu/:/usr/lib/gcc/i686-linux-gnu/4.6/../../../../lib/:/lib/i386-linux-gnu/:/lib/../lib/:/usr/lib/i386-linux-gnu/:/usr/lib/../lib/:/usr/lib/i386-linux-gnu/:/usr/lib/gcc/i686-linux-gnu/4.6/../../../:/lib/:/usr/lib/
> COLLECT_GCC_OPTIONS='-E' '-v' '-mtune=generic'
'-march=i686'
> $
> ***************************************
>
> Running "gcc -x c++ -E -v -" gives me the following:
>
> ***************************************
> $ gcc -x c++ -E -v -
> Using built-in specs.
> COLLECT_GCC=gcc
> COLLECT_LTO_WRAPPER=/usr/lib/gcc/i686-linux-gnu/4.6/lto-wrapper
> Target: i686-linux-gnu
> Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.6.3-1ubuntu5' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.6 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object
--enable-plugin --enable-objc-gc --enable-targets=all --disable-werror
--with-arch-32=i686 --with-tune=generic --enable-checking=release
--build=i686-linux-gnu --host=i686-linux-gnu --target=i686-linux-gnu
> Thread model: posix
> gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
> COLLECT_GCC_OPTIONS='-E' '-v' '-mtune=generic'
'-march=i686'
>   /usr/lib/gcc/i686-linux-gnu/4.6/cc1plus -E -quiet -v -imultilib .
-imultiarch i386-linux-gnu -D_GNU_SOURCE - -mtune=generic -march=i686
-fstack-protector
> ignoring nonexistent directory
"/usr/local/include/i386-linux-gnu"
> ignoring nonexistent directory
"/usr/lib/gcc/i686-linux-gnu/4.6/../../../../i686-linux-gnu/include"
> ignoring duplicate directory "/usr/include/i386-linux-gnu"
> #include "..." search starts here:
> #include <...> search starts here:
>   /usr/include/i386-linux-gnu
>   /usr/include/c++/4.6
>   /usr/include/c++/4.6/i686-linux-gnu/.
>   /usr/include/c++/4.6/backward
>   /usr/lib/gcc/i686-linux-gnu/4.6/include
>   /usr/local/include
>   /usr/lib/gcc/i686-linux-gnu/4.6/include-fixed
>   /usr/include
> End of search list.
> # 1 "<stdin>"
> # 1 "<built-in>"
> # 1 "<command-line>"
> # 1 "<stdin>"
>
COMPILER_PATH=/usr/lib/gcc/i686-linux-gnu/4.6/:/usr/lib/gcc/i686-linux-gnu/4.6/:/usr/lib/gcc/i686-linux-gnu/:/usr/lib/gcc/i686-linux-gnu/4.6/:/usr/lib/gcc/i686-linux-gnu/
>
LIBRARY_PATH=/usr/lib/gcc/i686-linux-gnu/4.6/:/usr/lib/gcc/i686-linux-gnu/4.6/../../../i386-linux-gnu/:/usr/lib/gcc/i686-linux-gnu/4.6/../../../../lib/:/lib/i386-linux-gnu/:/lib/../lib/:/usr/lib/i386-linux-gnu/:/usr/lib/../lib/:/usr/lib/i386-linux-gnu/:/usr/lib/gcc/i686-linux-gnu/4.6/../../../:/lib/:/usr/lib/
> COLLECT_GCC_OPTIONS='-E' '-v' '-mtune=generic'
'-march=i686'
> $
> ***************************************
>
> Notice that "#include<...> search" has
"/usr/include" in the list, for
> both c and c++.  Now I do a ls -l /usr/include/features.h, and I see
> the following:
>
> ***************************************
>
> $ ls -l /usr/include/features.h
> -rw-r--r-- 1 root root 13084 Oct  5 16:34 /usr/include/features.h
> $
>
> ***************************************
>
> So I'm confused!  Why can't the header file be found by the
compiler
> when making clang/compiler-rt?
>
> Thanks,
>     Michael
>
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