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[offload] Unset -march when building GPU libraries (#136442)

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Unset `-march` when invoking the compiler and linker to build the GPU
libraries. These libraries use GPU targets rather than the CPU targets,
and an incidental `-march=native` causes Clang to be able to determine
the GPU used — which causes the build to fail when there is no GPU
available. Resetting `-march=` should suffice to revert to building
generic code for the time being.

See the discussion in:
https://github.com/llvm/llvm-project/pull/126143#issuecomment-2816718492
This commit is contained in:
Michał Górny
2025-04-20 06:16:19 +02:00
committed by GitHub
parent 9bcb18db89
commit ac8fc09688
1 changed files with 2 additions and 2 deletions
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4
offload/DeviceRTL/CMakeLists.txt
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@@ -137,9 +137,9 @@ function(compileDeviceRTLLibrary target_name target_triple)
BUILD_RPATH ""
INSTALL_RPATH ""
RUNTIME_OUTPUT_NAME libomptarget-${target_name}.bc)
target_compile_options(libomptarget-${target_name} PRIVATE "--target=${target_triple}")
target_compile_options(libomptarget-${target_name} PRIVATE "--target=${target_triple}" "-march=")
target_link_options(libomptarget-${target_name} PRIVATE "--target=${target_triple}"
"-r" "-nostdlib" "-flto" "-Wl,--lto-emit-llvm")
"-r" "-nostdlib" "-flto" "-Wl,--lto-emit-llvm" "-march=")
install(TARGETS libomptarget-${target_name}
PERMISSIONS OWNER_WRITE OWNER_READ GROUP_READ WORLD_READ
DESTINATION ${OFFLOAD_INSTALL_LIBDIR})