pat-s
7f6a15abb2Prepend ccache's masquerade dir to PATH in the build pipelines and set the ccache options that make hits possible for R's per-package temp dirs, plus MAKEFLAGS matched to each step's CPU limit.
32 lines
1.5 KiB
Shell
32 lines
1.5 KiB
Shell
# Sourced (`. local/compiler-cache.sh`) by the build pipelines before any
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# package is compiled. POSIX sh: the Alpine images run steps under busybox.
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#
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# Routes gcc/g++ through ccache. The images name their compilers by bare
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# `gcc`/`g++` in both R's Makeconf and /root/.R/Makevars, so prepending ccache's
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# masquerade dir catches every compile, CMake-driven vendored builds included.
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# Wrapping CC in a Makevars instead would need R_MAKEVARS_USER, which replaces
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# the images' /root/.R/Makevars (CXX_STD, the musl defines) rather than adding
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# to it. The dir differs per distro: Alpine, RHEL, Debian/Ubuntu.
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for dir in /usr/lib/ccache/bin /usr/lib64/ccache /usr/lib/ccache; do
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if [ -x "$dir/gcc" ]; then
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PATH="$dir:$PATH"
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break
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fi
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done
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export PATH
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# R compiles every package in a fresh /tmp/RtmpXXXXXX/<pkg> dir. R's default
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# flags include -g, which makes ccache hash the working directory, and the line
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# markers carry the absolute source path, so without these two settings no
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# compile ever hits the cache across runs.
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export CCACHE_BASEDIR="${CCACHE_BASEDIR:-/tmp}"
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export CCACHE_NOHASHDIR=1
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# The images are rebuilt regularly, which changes the compiler's mtime but not
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# its content. ccache's default mtime check would discard the cache each time.
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export CCACHE_COMPILERCHECK=content
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# Parallel make inside a single package build. Match it to the step's CPU limit
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# via MAKE_JOBS; an explicit MAKEFLAGS wins.
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export MAKEFLAGS="${MAKEFLAGS:--j${MAKE_JOBS:-2}}"
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echo "compiler-cache: $(command -v gcc), CCACHE_DIR=${CCACHE_DIR:-unset}, MAKEFLAGS=$MAKEFLAGS"
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