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Merged
merged 2 commits into from
Oct 27, 2025
+7 −6
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workflows/release-binaries: Disable flang on Darwin #164667

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workflows/release-binaries: Disable flang on Darwin
tstellar Oct 22, 2025
c9c67a0
Update clang/cmake/caches/Release.cmake
tstellar Oct 24, 2025
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5 changes: 0 additions & 5 deletions .github/workflows/release-binaries.yml
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Expand Up @@ -132,11 +132,6 @@ jobs:
arches=arm64
else
arches=x86_64
# Disable Flang builds on macOS x86_64. The FortranLower library takes
# 2-3 hours to build on macOS, much slower than on Linux.
# The long build time causes the release build to time out on x86_64,
# so we need to disable flang there.
target_cmake_flags="$target_cmake_flags -DLLVM_RELEASE_ENABLE_PROJECTS='clang;lld;lldb;clang-tools-extra;polly;mlir'"
fi
target_cmake_flags="$target_cmake_flags -DBOOTSTRAP_BOOTSTRAP_DARWIN_osx_ARCHS=$arches -DBOOTSTRAP_BOOTSTRAP_DARWIN_osx_BUILTIN_ARCHS=$arches"
fi
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8 changes: 7 additions & 1 deletion clang/cmake/caches/Release.cmake
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Expand Up @@ -30,12 +30,18 @@ endfunction()
#
# cmake -D LLVM_RELEASE_ENABLE_PGO=ON -C Release.cmake

set (DEFAULT_PROJECTS "clang;lld;lldb;clang-tools-extra;polly;mlir;flang")
set (DEFAULT_PROJECTS "clang;lld;lldb;clang-tools-extra;polly;mlir")
# bolt only supports ELF, so only enable it for Linux.
if (${CMAKE_HOST_SYSTEM_NAME} MATCHES "Linux")
list(APPEND DEFAULT_PROJECTS "bolt")
endif()

# Don't build flang on Darwin due to:
# https://github.com/llvm/llvm-project/issues/160546
if (NOT ${CMAKE_HOST_SYSTEM_NAME} MATCHES "Darwin")
list(APPEND DEFAULT_PROJECTS "flang")
endif()

set (DEFAULT_RUNTIMES "compiler-rt;libcxx")
if (NOT WIN32)
list(APPEND DEFAULT_RUNTIMES "libcxxabi" "libunwind")
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