[Openmp-dev] Build error

Itaru Kitayama via Openmp-dev openmp-dev at lists.llvm.org
Wed Jun 16 20:04:54 PDT 2021

Hi Jon,
Thanks for taking a look at the logs. By adding the
I was able to (CMake) configure and do a Ninja build using
`-DLLVM_ENABLE_RUNTIMES="openmp"`. And yes, while I'm on JSC's JURECA
I use
Environmental Modules.

On Wed, Jun 16, 2021 at 9:14 PM Jon Chesterfield via Openmp-dev
<openmp-dev at lists.llvm.org> wrote:
>> Hi,
>> I am configuring a openmp runtime build this way:
>>  cmake -G Ninja -DCMAKE_BUILD_TYPE=Release \
>>         -DCMAKE_INSTALL_PREFIX=$PROJECT/kitayama1/dev/clang \
>>         -DCMAKE_C_COMPILER=clang \
>>         -DCMAKE_CXX_COMPILER=clang++ \
>>         -DLLVM_ENABLE_RUNTIMES="openmp" \
>>         $SCRATCH/kitayama1/projects/llvm-project/llvm
>> ... however I see a build error:
>> ... CCcore-9.3.0/bin/ld:
>> undefined reference to `std::_Sp_make_shared_tag::_S_eq(std::type_info
>> const&)
> Cmake invocation looks fine. It appears the static llvm libraries linked have been built with incompatible c++ flags to the other libraries found on your system.
> A few options come to mind. You could pass the flags to disable zlib et al, search for what compiler flag (or maybe libc++ version) corresponds to that symbol and pass the options to the llvm build, or look up how the other libraries were built and change that.
> Clang builds are probably tested against the libraries that ship with Linux distributions. The paths in your error message suggest you're using some other source for them. Maybe a HPC module system of some sort? Can't see how to debug that from the outside. Maybe contact whoever set up the zlib etc builds.
> Jon
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