[cfe-dev] Trouble building Clang on CentOS 6

Wed Sep 13 09:14:34 PDT 2017

Setting LD_LIBRARY_PATH seems to solve the problem but then leaves a
runtime dependency. The variable needs to be set when the executable is
called as well. The instructions provided a CMake variable that was
supposed to solve this problem (CMAKE_CXX_LINK_FLAGS)... only it doesn't
seem to work.

On Thu, Sep 7, 2017 at 4:45 PM, Jeff Hammond <jeff.science at gmail.com> wrote:

> /usr/lib64/libstdc++.so.6 indicates that you need to set LD_LIBRARY_PATH
> to point to the toolchain you installed.
>
> Best,
>
> Jeff
>
>
> On Wed, Sep 6, 2017 at 3:07 PM, Uri Moszkowicz <uri at 4refs.com> wrote:
>
>> 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/buildscri
>>> pts/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/buil
>>> tins/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.builti
>>> ns-x86_64.dir/absvdi2.c.o
>>> >> > [  6%] Building CXX object
>>> >> > projects/compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanit
>>> izerCommonLibc.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/CMakeFil
>>> es/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/
>>>
>>
>>
>
>
> --
> Jeff Hammond
> jeff.science at gmail.com
> http://jeffhammond.github.io/
>
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