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

[Siva Chandra via libc-dev]

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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