[libc-dev] libc project can't be built together with other projects

[Siva Chandra via libc-dev]

On Mon, Dec 2, 2019 at 3:22 PM Itaru Kitayama <itaru.kitayama at gmail.com> wrote:
>
> Shouldn't a project be independent of other projects?

May be there is, but I am not aware of any policy around this. You
should ask the openmp people about why they require clang.

>
> On Tue, Dec 3, 2019 at 8:19 AM Siva Chandra <sivachandra at google.com> wrote:
>>
>> It seems to me that openmp requires clang to be built along with it.
>> For example, remove libc from the list and you will be able to
>> reproduce the same errors you are seeing. Add clang and they will go
>> away.
>>
>> On Mon, Dec 2, 2019 at 3:11 PM Itaru Kitayama <itaru.kitayama at gmail.com> wrote:
>> >
>> > cmake -GNinja -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=$HOME/opt/llvm-libc/${now} -DCMAKE_C_COMPILER=armclang -DCMAKE_CXX_COMPILER=armclang++ -DLLVM_ENABLE_PROJECTS="libc;openmp" -DLLVM_TARGETS_TO_BUILD="AArch64;NVPTX" ~/projects/llvm-project/llvm
>> >
>> > On Tue, Dec 3, 2019 at 7:58 AM Siva Chandra <sivachandra at google.com> wrote:
>> >>
>> >> I normally build clang and LLD along with libc and have not seen any
>> >> problems. I added openmp to that list now and could build without any
>> >> problems. My CMake line was:
>> >>
>> >> $> cmake ../llvm -G Ninja
>> >> -DLLVM_ENABLE_PROJECTS="libc;clang;lld;openmp"
>> >> -DLLVM_USE_SANITIZER=Address
>> >>
>> >> Can you share the cmake command line that is causing problems for you?
>> >>
>> >> On Mon, Dec 2, 2019 at 2:41 PM Itaru Kitayama via libc-dev
>> >> <libc-dev at lists.llvm.org> wrote:
>> >> >
>> >> > If I add, for example, openmp to the list of projects, CMake errors out:
>> >> >
>> >> > [...]
>> >> > -- Performing Test HAVE_POSIX_REGEX
>> >> > -- Performing Test HAVE_POSIX_REGEX -- success
>> >> > -- Performing Test HAVE_STEADY_CLOCK
>> >> > -- Performing Test HAVE_STEADY_CLOCK
>> >> > -- Performing Test HAVE_STEADY_CLOCK -- success
>> >> > -- Configuring done
>> >> > CMake Error at cmake/modules/AddLLVM.cmake:1456 (add_dependencies):
>> >> >   The dependency target "clang" of target "check-all" does not exist.
>> >> > Call Stack (most recent call first):
>> >> >   CMakeLists.txt:987 (add_lit_target)
>> >> >
>> >> >
>> >> > CMake Error at cmake/modules/AddLLVM.cmake:1456 (add_dependencies):
>> >> >   The dependency target "clang-resource-headers" of target "check-all" does
>> >> >   not exist.
>> >> > Call Stack (most recent call first):
>> >> >   CMakeLists.txt:987 (add_lit_target)
>> >> >
>> >> >
>> >> > CMake Error at /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1456 (add_dependencies):
>> >> >   The dependency target "clang" of target "check-openmp" does not exist.
>> >> > Call Stack (most recent call first):
>> >> >   /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1477 (add_lit_target)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/cmake/OpenMPTesting.cmake:175 (add_lit_testsuite)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/cmake/OpenMPTesting.cmake:190 (add_openmp_testsuite)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/CMakeLists.txt:95 (construct_check_openmp_target)
>> >> >
>> >> >
>> >> > CMake Error at /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1456 (add_dependencies):
>> >> >   The dependency target "clang-resource-headers" of target "check-openmp"
>> >> >   does not exist.
>> >> > Call Stack (most recent call first):
>> >> >   /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1477 (add_lit_target)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/cmake/OpenMPTesting.cmake:175 (add_lit_testsuite)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/cmake/OpenMPTesting.cmake:190 (add_openmp_testsuite)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/CMakeLists.txt:95 (construct_check_openmp_target)
>> >> >
>> >> >
>> >> > CMake Error at /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1456 (add_dependencies):
>> >> >   The dependency target "clang" of target "check-ompt" does not exist.
>> >> > Call Stack (most recent call first):
>> >> >   /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1477 (add_lit_target)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/cmake/OpenMPTesting.cmake:175 (add_lit_testsuite)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/runtime/test/CMakeLists.txt:36 (add_openmp_testsuite)
>> >> >
>> >> >
>> >> > CMake Error at /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1456 (add_dependencies):
>> >> >   The dependency target "clang-resource-headers" of target "check-ompt" does
>> >> >   not exist.
>> >> > Call Stack (most recent call first):
>> >> >   /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1477 (add_lit_target)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/cmake/OpenMPTesting.cmake:175 (add_lit_testsuite)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/runtime/test/CMakeLists.txt:36 (add_openmp_testsuite)
>> >> >
>> >> >
>> >> > CMake Error at /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1456 (add_dependencies):
>> >> >   The dependency target "clang" of target "check-libomp" does not exist.
>> >> > Call Stack (most recent call first):
>> >> >   /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1477 (add_lit_target)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/cmake/OpenMPTesting.cmake:175 (add_lit_testsuite)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/runtime/test/CMakeLists.txt:33 (add_openmp_testsuite)
>> >> >
>> >> >
>> >> > CMake Error at /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1456 (add_dependencies):
>> >> >   The dependency target "clang-resource-headers" of target "check-libomp"
>> >> >   does not exist.
>> >> > Call Stack (most recent call first):
>> >> >   /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1477 (add_lit_target)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/cmake/OpenMPTesting.cmake:175 (add_lit_testsuite)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/runtime/test/CMakeLists.txt:33 (add_openmp_testsuite)
>> >> >
>> >> >
>> >> > CMake Error at /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1456 (add_dependencies):
>> >> >   The dependency target "clang" of target "check-libomptarget" does not
>> >> >   exist.
>> >> > Call Stack (most recent call first):
>> >> >   /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1477 (add_lit_target)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/cmake/OpenMPTesting.cmake:175 (add_lit_testsuite)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/libomptarget/test/CMakeLists.txt:15 (add_openmp_testsuite)
>> >> >
>> >> >
>> >> > CMake Error at /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1456 (add_dependencies):
>> >> >   The dependency target "clang-resource-headers" of target
>> >> >   "check-libomptarget" does not exist.
>> >> > Call Stack (most recent call first):
>> >> >   /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1477 (add_lit_target)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/cmake/OpenMPTesting.cmake:175 (add_lit_testsuite)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/libomptarget/test/CMakeLists.txt:15 (add_openmp_testsuite)
>> >> >
>> >> >
>> >> > CMake Error at /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1456 (add_dependencies):
>> >> >   The dependency target "clang" of target "check-libarcher" does not exist.
>> >> > Call Stack (most recent call first):
>> >> >   /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1477 (add_lit_target)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/cmake/OpenMPTesting.cmake:175 (add_lit_testsuite)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/tools/archer/tests/CMakeLists.txt:29 (add_openmp_testsuite)
>> >> >
>> >> >
>> >> > CMake Error at /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1456 (add_dependencies):
>> >> >   The dependency target "clang-resource-headers" of target "check-libarcher"
>> >> >   does not exist.
>> >> > Call Stack (most recent call first):
>> >> >   /fefs/home/r1050/projects/llvm-project/llvm/cmake/modules/AddLLVM.cmake:1477 (add_lit_target)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/cmake/OpenMPTesting.cmake:175 (add_lit_testsuite)
>> >> >   /fefs/home/r1050/projects/llvm-project/openmp/tools/archer/tests/CMakeLists.txt:29 (add_openmp_testsuite)
>> >> > _______________________________________________
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