mirror of
https://github.com/SerenityOS/serenity
synced 2024-09-06 17:06:31 +00:00
5f724b6ca1
When libstdc++ was added in 4977fd22b8, just calling
'make install' was the easiest way to install the headers. And the headers are all
that is needed for libstdc++ to determine the ABI. Since then, BuildIt.sh was
rewritten again and again, and somehow everyone just silently assumed that
libstdc++ also depends on libc.a and libm.a, because surely it does?
Turns out, it doesn't! This massively reduces the dependencies of libstdc++,
hopefully meaning that the Toolchain doesn't need to be rebuilt so often on Travis.
Furthermore, the old method of trying to determine the dependency tree with
bash/grep/etc. has finally broken anyways:
https://travis-ci.com/github/SerenityOS/serenity/builds/179805569#L567
In summary, this should eliminate most of the Toolchain rebuilds on Travis,
and therefore make Travis build blazingly fast! :^)
49 lines
1.7 KiB
Bash
Executable file
49 lines
1.7 KiB
Bash
Executable file
#!/usr/bin/env bash
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set -euo pipefail
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# This file will need to be run in bash, for now.
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if [ $# -lt 1 ] ; then
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echo "USAGE: echo \"YOURCONFIG\" | $0 <HASH-INVOCATION>" >&2
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echo "Example: echo \"uname=Linux,TARGET=i686-pc-serenity\" | $0 md5sum" >&2
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echo "Example: echo \"uname=OpenBSD,TARGET=i686-pc-serenity\" | $0 md5 -q" >&2
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exit 1
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fi
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DIR=$( cd "$( dirname "$0" )" && pwd )
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cd "${DIR}/.."
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if [ ! -r LICENSE ] ; then
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echo "$0: Got confused by the directories, giving up." >&2
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exit 1
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fi
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# Ensure cleanup
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DEPLIST_FILE=$(mktemp /tmp/serenity_deps_XXXXXXXX.lst)
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function finish {
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rm -f "${DEPLIST_FILE}"
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}
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trap finish EXIT
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# First, capture the caller's input.
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echo "$0: Configuration:" >&2
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cat /dev/stdin | tee /dev/stderr > "${DEPLIST_FILE}"
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# "$@" is the md5sum invocation.
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"$@" Toolchain/ComputeDependenciesHash.sh | tee /dev/stderr >> "${DEPLIST_FILE}"
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# libstdc++ depends on the *headers* of libc, so we pessimistically assume it depends
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# on *all* of them.
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# This list of files can be cut down considerably:
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# strace -ff -e trace=file "make install-target-libstdc++-v3" 2>&1 >/dev/null | perl -ne 's/^[^"]+"(([^\\"]|\\[\\"nt])*)".*/$1/ && print' | sort -u | grep -P 'serenity/Build/Root/usr/include/.*\.h$'
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# However, we don't want to risk breaking the build when we upgrade gcc in the future.
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#
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# If you want to further cut down the Toolchain rebuilds on Travis,
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# one way would be to reduce this list somehow.
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cd Libraries/LibC/
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find -name '*.h' | sort | xargs "$@" | tee /dev/stderr >> "${DEPLIST_FILE}"
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# The piping might hide non-zero exit-codes,
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# but thankfully only the first command can reasonably fail.
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echo "$0: Toolchain hash:" >&2
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"$@" "${DEPLIST_FILE}" | cut -f1 -d' ' | tee /dev/stderr
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echo "$0: Great success!" >&2
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