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[Flang] Stop building multiple versions of the OpenMP library #126657

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[Flang] Stop building multiple versions of the OpenMP library #126657

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30 changes: 4 additions & 26 deletions flang/cmake/modules/AddFlangOffloadRuntime.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -96,36 +96,14 @@ macro(enable_omp_offload_compilation files)
if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" AND
"${CMAKE_C_COMPILER_ID}" MATCHES "Clang")

set(all_amdgpu_architectures
"gfx700;gfx701;gfx801;gfx803;gfx900;gfx902;gfx906"
"gfx908;gfx90a;gfx90c;gfx940;gfx1010;gfx1030"
"gfx1031;gfx1032;gfx1033;gfx1034;gfx1035;gfx1036"
"gfx1100;gfx1101;gfx1102;gfx1103;gfx1150;gfx1151"
"gfx1152;gfx1153"
)
set(all_nvptx_architectures
"sm_35;sm_37;sm_50;sm_52;sm_53;sm_60;sm_61;sm_62"
"sm_70;sm_72;sm_75;sm_80;sm_86;sm_89;sm_90"
)
set(all_gpu_architectures
"${all_amdgpu_architectures};${all_nvptx_architectures}"
)
# TODO: support auto detection on the build system.
if (FLANG_OMP_DEVICE_ARCHITECTURES STREQUAL "all")
set(FLANG_OMP_DEVICE_ARCHITECTURES ${all_gpu_architectures})
endif()
list(REMOVE_DUPLICATES FLANG_OMP_DEVICE_ARCHITECTURES)

string(REPLACE ";" "," compile_for_architectures
"${FLANG_OMP_DEVICE_ARCHITECTURES}"
)

set(OMP_COMPILE_OPTIONS
-fopenmp
-fvisibility=hidden
-fopenmp-cuda-mode
--offload-arch=${compile_for_architectures}
# Force LTO for the device part.
-fopenmp-targets=amdgcn-amd-amdhsa,nvptx64-nvidia-cuda
-Xopenmp-target=amdgcn-amd-amdhsa -march=''
-Xopenmp-target=nvptx64-nvidia-cuda -march=''
-nogpulib
-foffload-lto
)
set_source_files_properties(${files} PROPERTIES COMPILE_OPTIONS
Expand Down