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action.yml
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name: Setup LLVM
description: Install LLVM/Clang toolchain
inputs:
version:
description: LLVM major version
required: true
os_type:
description: Target OS type (linux-glibc, linux-musl, macos, windows)
required: true
outputs:
cc:
description: C compiler path
value: ${{ steps.paths.outputs.cc }}
cxx:
description: C++ compiler path
value: ${{ steps.paths.outputs.cxx }}
ar:
description: AR path
value: ${{ steps.paths.outputs.ar }}
ranlib:
description: RANLIB path
value: ${{ steps.paths.outputs.ranlib }}
strip:
description: Strip path
value: ${{ steps.paths.outputs.strip }}
ld:
description: Linker path
value: ${{ steps.paths.outputs.ld }}
runs:
using: composite
steps:
- name: Install LLVM (Linux glibc)
if: inputs.os_type == 'linux-glibc'
shell: bash
env:
DEBIAN_FRONTEND: noninteractive
run: |
wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key | tee /etc/apt/trusted.gpg.d/apt.llvm.org.asc
echo "deb https://apt.llvm.org/jammy/ llvm-toolchain-jammy-${{ inputs.version }} main" > /etc/apt/sources.list.d/llvm.list
apt-get update
apt-get install -y clang-${{ inputs.version }} lld-${{ inputs.version }} llvm-${{ inputs.version }}
# linux-musl: LLVM installed via apk in workflow setup step
# macos: LLVM installed via brew in workflow setup step
# windows: Using MinGW toolchain
- name: Set output paths
id: paths
shell: bash
run: |
case "${{ inputs.os_type }}" in
linux-glibc)
echo "cc=clang-${{ inputs.version }}" >> $GITHUB_OUTPUT
echo "cxx=clang++-${{ inputs.version }}" >> $GITHUB_OUTPUT
echo "ar=llvm-ar-${{ inputs.version }}" >> $GITHUB_OUTPUT
echo "ranlib=llvm-ranlib-${{ inputs.version }}" >> $GITHUB_OUTPUT
echo "strip=llvm-strip-${{ inputs.version }}" >> $GITHUB_OUTPUT
echo "ld=lld-${{ inputs.version }}" >> $GITHUB_OUTPUT
;;
linux-musl)
echo "cc=clang" >> $GITHUB_OUTPUT
echo "cxx=clang++" >> $GITHUB_OUTPUT
echo "ar=llvm-ar" >> $GITHUB_OUTPUT
echo "ranlib=llvm-ranlib" >> $GITHUB_OUTPUT
echo "strip=llvm-strip" >> $GITHUB_OUTPUT
echo "ld=lld" >> $GITHUB_OUTPUT
;;
macos)
LLVM_PREFIX=$(brew --prefix llvm)
echo "cc=$LLVM_PREFIX/bin/clang" >> $GITHUB_OUTPUT
echo "cxx=$LLVM_PREFIX/bin/clang++" >> $GITHUB_OUTPUT
echo "ar=$LLVM_PREFIX/bin/llvm-ar" >> $GITHUB_OUTPUT
echo "ranlib=$LLVM_PREFIX/bin/llvm-ranlib" >> $GITHUB_OUTPUT
echo "strip=strip" >> $GITHUB_OUTPUT
echo "ld=" >> $GITHUB_OUTPUT
;;
windows)
echo "cc=clang" >> $GITHUB_OUTPUT
echo "cxx=clang++" >> $GITHUB_OUTPUT
echo "ar=llvm-ar" >> $GITHUB_OUTPUT
echo "ranlib=llvm-ranlib" >> $GITHUB_OUTPUT
echo "strip=llvm-strip" >> $GITHUB_OUTPUT
echo "ld=lld" >> $GITHUB_OUTPUT
;;
esac

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