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[Offload] Provide a cache file for building OpenMP w/ Flang offloading (#178472)

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Summary:
This build is more annoying, enables everything required for this
version of the runtime.
This commit is contained in:
Joseph Huber 2026-01-29 12:35:42 -06:00 committed by GitHub
parent 8513cadd0e
commit 830236204e
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2 changed files with 15 additions and 0 deletions
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13
offload/cmake/caches/FlangOffload.cmake Normal file
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@ -0,0 +1,13 @@
set(LLVM_ENABLE_PROJECTS "clang;flang;mlir;clang-tools-extra;lld" CACHE STRING "")
set(LLVM_ENABLE_RUNTIMES "compiler-rt;flang-rt;libunwind;libcxx;libcxxabi;openmp;offload" CACHE STRING "")
set(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR ON CACHE BOOL "")
set(LLVM_RUNTIME_TARGETS default;amdgcn-amd-amdhsa;nvptx64-nvidia-cuda CACHE STRING "")
set(RUNTIMES_nvptx64-nvidia-cuda_CACHE_FILES "${CMAKE_SOURCE_DIR}/../libcxx/cmake/caches/NVPTX.cmake" CACHE STRING "")
set(RUNTIMES_amdgcn-amd-amdhsa_CACHE_FILES "${CMAKE_SOURCE_DIR}/../libcxx/cmake/caches/AMDGPU.cmake" CACHE STRING "")
set(RUNTIMES_nvptx64-nvidia-cuda_LLVM_ENABLE_RUNTIMES "compiler-rt;libc;openmp;libcxx;libcxxabi;flang-rt" CACHE STRING "")
set(RUNTIMES_amdgcn-amd-amdhsa_LLVM_ENABLE_RUNTIMES "compiler-rt;libc;openmp;libcxx;libcxxabi;flang-rt" CACHE STRING "")
set(RUNTIMES_nvptx64-nvidia-cuda_FLANG_RT_LIBC_PROVIDER llvm CACHE STRING "")
set(RUNTIMES_nvptx64-nvidia-cuda_FLANG_RT_LIBCXX_PROVIDER llvm CACHE STRING "")
set(RUNTIMES_amdgcn-amd-amdhsa_FLANG_RT_LIBC_PROVIDER llvm CACHE STRING "")
set(RUNTIMES_amdgcn-amd-amdhsa_FLANG_RT_LIBCXX_PROVIDER llvm CACHE STRING "")

2
openmp/docs/Building.md
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@ -194,6 +194,8 @@ cmake ../llvm -G Ninja \
-DCMAKE_INSTALL_PREFIX=<PATH>
```
Additionally, the `FlangOffload.cmake` file is provided for users that wish to
build a complete Fortran offloading toolchain.
## Building on Windows