[libcxx-commits] [PATCH] D150908: [libc++][ci] Use ccache in the jobs that build Clang

[Louis Dionne via Phabricator via libcxx-commits]

ldionne created this revision.
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This is an attempt to reduce the time taken by the Bootstrapping
build job and the Clang CI job that builds the compiler from scratch.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D150908

Files:
  libcxx/utils/ci/buildkite-pipeline-clang.yml
  libcxx/utils/ci/run-buildbot


Index: libcxx/utils/ci/run-buildbot
===================================================================
--- libcxx/utils/ci/run-buildbot
+++ libcxx/utils/ci/run-buildbot
@@ -333,6 +333,7 @@
           -S "${MONOREPO_ROOT}/llvm" \
           -B "${BUILD_DIR}" \
           -GNinja -DCMAKE_MAKE_PROGRAM="${NINJA}" \
+          -DCMAKE_CXX_COMPILER_LAUNCHER="ccache" \
           -DCMAKE_BUILD_TYPE=RelWithDebInfo \
           -DCMAKE_INSTALL_PREFIX="${INSTALL_DIR}" \
           -DLLVM_ENABLE_PROJECTS="clang" \
Index: libcxx/utils/ci/buildkite-pipeline-clang.yml
===================================================================
--- libcxx/utils/ci/buildkite-pipeline-clang.yml
+++ libcxx/utils/ci/buildkite-pipeline-clang.yml
@@ -22,7 +22,7 @@
       # We use Release here to avoid including debug information. Otherwise, the clang binary is very large, which
       # is problematic because we need to upload the artifacts for other jobs to use. This may seem like nothing,
       # but with the number of jobs we run daily, this can result in thousands of GB of network I/O.
-      - "cmake -S llvm -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=install -DLLVM_ENABLE_PROJECTS=\"clang;compiler-rt\""
+      - "cmake -S llvm -B build -G Ninja -DCMAKE_CXX_COMPILER_LAUNCHER="ccache" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=install -DLLVM_ENABLE_PROJECTS=\"clang;compiler-rt\""
       - "ninja -C build install-clang install-clang-resource-headers"
       - "tar -cJvf install.tar.xz install/"
       - "buildkite-agent artifact upload --debug install.tar.xz"


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