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fix(ci): wire sccache into the CMake compiler launcher #7

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Merged
Emin017 merged 2 commits into from
Sep 4, 2026
Merged

fix(ci): wire sccache into the CMake compiler launcher #7

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87986a2
fix(ci): wire sccache into the CMake compiler launcher
Emin017 Sep 3, 2026
1e28e70
fix(ci): enable the sccache GitHub Actions cache backend
Emin017 Sep 3, 2026
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20 changes: 20 additions & 0 deletions .github/scripts/build-sizer.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -25,8 +25,20 @@ if [[ -f "${openroad_deps_prefixes}" ]]; then
done
fi

cmake_compiler_launcher_args=()
if command -v sccache >/dev/null 2>&1; then
echo "sccache detected at $(command -v sccache); enabling CMake compiler launcher"
cmake_compiler_launcher_args=(
-DCMAKE_C_COMPILER_LAUNCHER=sccache
-DCMAKE_CXX_COMPILER_LAUNCHER=sccache
)
else
echo "sccache not found on PATH; building without a compiler cache"
fi

cmake -S . -B build \
"${cmake_dependency_args[@]}" \
"${cmake_compiler_launcher_args[@]}" \
-DCMAKE_BUILD_TYPE=Release \
-DENABLE_TESTS=OFF \
-DUSE_SYSTEM_BOOST=ON \
Expand All @@ -40,4 +52,12 @@ cmake -S . -B build \
-DZLIB_HOME=/usr/lib/x86_64-linux-gnu \
-DCMAKE_RULE_MESSAGES=OFF

if [[ ${#cmake_compiler_launcher_args[@]} -gt 0 ]]; then
if grep -q "sccache" build/src/CMakeFiles/Sizer.dir/build.make; then
echo "Verified: generated compile rules invoke sccache"
else
echo "WARNING: sccache is missing from the generated compile rules" >&2
fi
fi

cmake --build build --target Sizer -j "${NPROC:-$(nproc)}"
8 changes: 8 additions & 0 deletions .github/workflows/build.yml
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Expand Up @@ -18,6 +18,10 @@ jobs:
build-linux-x64:
name: Build Linux x64
runs-on: ubuntu-22.04
env:
# sccache-action does not enable the GHA cache backend by itself;
# without this, sccache falls back to an ephemeral local-disk cache.
SCCACHE_GHA_ENABLED: "true"
outputs:
archive-name: ${{ steps.package.outputs.archive-name }}
steps:
Expand All @@ -37,6 +41,10 @@ jobs:
env:
SIZER_VERSION: ${{ inputs.version }}

- name: Show sccache stats
if: always()
run: "${SCCACHE_PATH:-sccache} --show-stats"

- name: Package Sizer with runtime wrapper
id: package
env:
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