[cfe-dev] Trouble building Clang on CentOS 6

Wed Sep 6 15:07:57 PDT 2017

I get the same error using your build script :(

 46%] Copying clang's cuda_wrappers/algorithm...
[ 46%] Copying clang's cuda_wrappers/new...
[ 46%] Copying clang's cuda_wrappers/complex...
[ 46%] Building arm_neon.h...
../../../../bin/clang-tblgen: /usr/lib64/libstdc++.so.6: version
`GLIBCXX_3.4.20' not found (required by ../../../../bin/clang-tblgen)
../../../../bin/clang-tblgen: /usr/lib64/libstdc++.so.6: version
`CXXABI_1.3.9' not found (required by ../../../../bin/clang-tblgen)
../../../../bin/clang-tblgen: /usr/lib64/libstdc++.so.6: version
`GLIBCXX_3.4.14' not found (required by ../../../../bin/clang-tblgen)
../../../../bin/clang-tblgen: /usr/lib64/libstdc++.so.6: version
`GLIBCXX_3.4.19' not found (required by ../../../../bin/clang-tblgen)
../../../../bin/clang-tblgen: /usr/lib64/libstdc++.so.6: version
`GLIBCXX_3.4.21' not found (required by ../../../../bin/clang-tblgen)
make[2]: *** [tools/clang/lib/Headers/arm_neon.h.tmp] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [tools/clang/lib/Headers/CMakeFiles/clang-headers.dir/all]
Error 2
[ 46%] Linking CXX executable ../../bin/not
[ 46%] Built target not
[ 46%] Linking CXX executable ../../bin/llvm-cxxfilt
[ 46%] Linking CXX executable ../../bin/llvm-mcmarkup
[ 46%] Built target llvm-cxxfilt

My CMake, FCC, and Python builds were from source, not the package manager.
I'm using CentOS 6.7 btw.

I think there's a clue in the error message here, given the reference to
/usr/lib64. I noticed that spaces in arguments were getting dropped by
CMake in commands. You don't have the linker option CMAKE_CXX_LINK_FLAGS
specified from the build instructions but even if you did, the latter half
of the option is truncated.

On Fri, Sep 1, 2017 at 10:33 PM, Jeff Hammond <jeff.science at gmail.com>
wrote:

> I built the latest Git on CentOS 6 two days ago, but I use upgraded CMake,
> GCC, Python and other things.  So there is nothing fundamentally wrong with
> CentOS other than the built-in packages it comes with are too old.
>
> I recall CMake does something idiotic wherein it prefers /usr/bin/python
> over `which python`, which you have to manually override with
> -DPYTHON_EXECUTABLE=`which python`, or at least that is what I archived in
> my successful build script.
> https://github.com/jeffhammond/HPCInfo/blob/master/buildscripts/llvm-git.
> sh#L95
>
> Jeff
>
>
> On Fri, Sep 1, 2017 at 3:18 PM, Uri Moszkowicz via cfe-dev <
> cfe-dev at lists.llvm.org> wrote:
> >
> > Hi Csaba,
> > I started with the instructions on the LLVM website. The problem is that
> CentOS 6 does not meet the build requirements, shown here:
> >
> > http://llvm.org/docs/GettingStarted.html#requirements
> >
> > I built the required versions of software but the instructions don't
> cover how to utilize them.
> >
> > Anyway, I compiled again with VERBOSE and discovered the problem is
> missing LibraryDependencies.inc. I specified python27 with a CMake variable
> and added it to my PATH but it still didn't solve the problem:
> >
> > make[2]: Nothing to be done for `projects/compiler-rt/lib/
> builtins/CMakeFiles/builtins.dir/build'.
> > make[2]: Leaving directory `<clang-4.0.1>/src/build/llvm-4.0.1-redhat6'
> > [ 36%] Built target builtins
> > <llvm-4.0.1>/tools/llvm-config/llvm-config.cpp:47:35: fatal error:
> LibraryDependencies.inc: No such file or directory
> >  #include "LibraryDependencies.inc"
> >                                    ^
> > compilation terminated.
> > make[2]: *** [tools/llvm-config/CMakeFiles/llvm-config.dir/llvm-config.cpp.o]
> Error 1
> > make[2]: Leaving directory `<clang-4.0.1>/src/build/llvm-4.0.1-redhat6'
> > make[1]: *** [tools/llvm-config/CMakeFiles/llvm-config.dir/all] Error 2
> >
> > How can I move past this error? Despite setting LD_LIBRARY_PATH and
> CMAKE_CXX_LINK_FLAGS as indicated in the instructions above, I also still
> seem to be getting GLIBC errors too :(
> >
> > Thanks,
> > Uri
> >
> >
> > On Thu, Aug 31, 2017 at 3:47 AM, Csaba Raduly <rcsaba at gmail.com> wrote:
> >>
> >> Hi Uri,
> >>
> >> On Wed, Aug 30, 2017 at 11:35 PM, Uri Moszkowicz via cfe-dev
> >> <cfe-dev at lists.llvm.org> wrote:
> >> > Hi,
> >> > I'm having trouble building Clang on CentOS 6 and am hoping someone
> here can
> >> > help. I followed the instructions on this website:
> >> >
> >> > http://btorpey.github.io/blog/2015/01/02/building-clang/
> >>
> >> Seems a bit old, why not  https://clang.llvm.org/get_started.html
> >>
> >> >
> >> > I'm using GCC 6.3.0 and Python 2.7.13, both also built from source
> using
> >> > these options:
> >> >
> >> > -DCMAKE_C_COMPILER=<gcc-6.3.0>/redhat6/bin/gcc
> >> > -DCMAKE_CXX_COMPILER=<gcc-6.3.0>/redhat6/bin/g++
> >> > -DCMAKE_CXX_LINK_FLAGS='-L<gcc-6.3.0>/redhat6/lib64
> >> > -Wl,-rpath,<gcc-6.3.0>/redhat6/lib64'
> >> > -DLLVM_ENABLE_ASSERTIONS=ON
> >> > -DCMAKE_BUILD_TYPE=Release
> >> > -DLLVM_TARGETS_TO_BUILD=X86
> >> > -DGCC_INSTALL_PREFIX=<gcc-6.3.0>/redhat6
> >> > -DPYTHON_EXECUTABLE:FILEPATH=<python-2.7.13>/redhat6/bin/python
> >> > -DCMAKE_INSTALL_PREFIX=<clang-4.0.1>/redhat6
> >> >
> >> > The errors I'm seeing look like this (I used -j32):
> >> >
> >> > [  4%] Building CXX object
> >> > lib/TableGen/CMakeFiles/LLVMTableGen.dir/Main.cpp.o
> >> > [  4%] Building CXX object
> >> > lib/Option/CMakeFiles/LLVMOption.dir/OptTable.cpp.o
> >> > [  6%] Building C object
> >> > projects/compiler-rt/lib/builtins/CMakeFiles/clang_rt.
> builtins-x86_64.dir/absvdi2.c.o
> >> > [  6%] Building CXX object
> >> > projects/compiler-rt/lib/sanitizer_common/CMakeFiles/
> RTSanitizerCommonLibc.x86_64.dir/sanitizer_coverage_mapping_libcdep.cc.o
> >> > Scanning dependencies of target LLVMSupport
> >> > g++: fatal error: no input files
> >> > compilation terminated.
> >> > make[2]: *** [bin/llvm-PerfectShuffle] Error 1
> >> > make[1]: *** [utils/PerfectShuffle/CMakeFiles/llvm-
> PerfectShuffle.dir/all]
> >> > Error 2
> >> (snip)
> >> >
> >> > Any thoughts about what else I need to do?
> >>
> >> For debugging purposes, build with
> >>
> >> make VERBOSE=1
> >>
> >> This would print the actual compiler invocation; the we'll have a
> >> better chance figuring out what went wrong.
> >>
> >> Csaba
> >> --
> >> GCS a+ e++ d- C++ ULS$ L+$ !E- W++ P+++$ w++$ tv+ b++ DI D++ 5++
> >> The Tao of math: The numbers you can count are not the real numbers.
> >> Life is complex, with real and imaginary parts.
> >> "Ok, it boots. Which means it must be bug-free and perfect. " -- Linus
> Torvalds
> >> "People disagree with me. I just ignore them." -- Linus Torvalds
> >
> >
> >
> > _______________________________________________
> > cfe-dev mailing list
> > cfe-dev at lists.llvm.org
> > http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev
> >
>
>
>
> --
> Jeff Hammond
> jeff.science at gmail.com
> http://jeffhammond.github.io/
>
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