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Diffstat (limited to 'src/ci/docker/scripts/musl-toolchain.sh')
-rw-r--r-- | src/ci/docker/scripts/musl-toolchain.sh | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/src/ci/docker/scripts/musl-toolchain.sh b/src/ci/docker/scripts/musl-toolchain.sh new file mode 100644 index 000000000..e358b8139 --- /dev/null +++ b/src/ci/docker/scripts/musl-toolchain.sh @@ -0,0 +1,74 @@ +#!/bin/sh +# This script runs `musl-cross-make` to prepare C toolchain (Binutils, GCC, musl itself) +# and builds static libunwind that we distribute for static target. +# +# Versions of the toolchain components are configurable in `musl-cross-make/Makefile` and +# musl unlike GLIBC is forward compatible so upgrading it shouldn't break old distributions. +# Right now we have: Binutils 2.31.1, GCC 9.2.0, musl 1.1.24. + +# ignore-tidy-linelength + +set -ex + +hide_output() { + set +x + on_err=" +echo ERROR: An error was encountered with the build. +cat /tmp/build.log +exit 1 +" + trap "$on_err" ERR + bash -c "while true; do sleep 30; echo \$(date) - building ...; done" & + PING_LOOP_PID=$! + "$@" &> /tmp/build.log + trap - ERR + kill $PING_LOOP_PID + rm /tmp/build.log + set -x +} + +ARCH=$1 +TARGET=$ARCH-linux-musl + +# Don't depend on the mirrors of sabotage linux that musl-cross-make uses. +LINUX_HEADERS_SITE=https://ci-mirrors.rust-lang.org/rustc/sabotage-linux-tarballs + +OUTPUT=/usr/local +shift + +# Ancient binutils versions don't understand debug symbols produced by more recent tools. +# Apparently applying `-fPIC` everywhere allows them to link successfully. +# Enable debug info. If we don't do so, users can't debug into musl code, +# debuggers can't walk the stack, etc. Fixes #90103. +export CFLAGS="-fPIC -g1 $CFLAGS" + +git clone https://github.com/richfelker/musl-cross-make # -b v0.9.9 +cd musl-cross-make +# A few commits ahead of v0.9.9 to include the cowpatch fix: +git checkout a54eb56f33f255dfca60be045f12a5cfaf5a72a9 + +# Fix the cfi detection script in musl's configure so cfi is generated +# when debug info is asked for. This patch is derived from +# https://git.musl-libc.org/cgit/musl/commit/?id=c4d4028dde90562f631edf559fbc42d8ec1b29de. +# When we upgrade to a version that includes this commit, we can remove the patch. +mkdir patches/musl-1.1.24 +cp ../musl-patch-configure.diff patches/musl-1.1.24/0001-fix-cfi-detection.diff + +hide_output make -j$(nproc) TARGET=$TARGET MUSL_VER=1.1.24 LINUX_HEADERS_SITE=$LINUX_HEADERS_SITE +hide_output make install TARGET=$TARGET MUSL_VER=1.1.24 LINUX_HEADERS_SITE=$LINUX_HEADERS_SITE OUTPUT=$OUTPUT + +cd - + +# Install musl library to make binaries executable +ln -s $OUTPUT/$TARGET/lib/libc.so /lib/ld-musl-$ARCH.so.1 +echo $OUTPUT/$TARGET/lib >> /etc/ld-musl-$ARCH.path + +# Now when musl bootstraps itself create proper toolchain symlinks to make build and tests easier +if [ "$REPLACE_CC" = "1" ]; then + for exec in cc gcc; do + ln -s $TARGET-gcc /usr/local/bin/$exec + done + for exec in cpp c++ g++; do + ln -s $TARGET-g++ /usr/local/bin/$exec + done +fi |