1#!/bin/sh 2# This script runs `musl-cross-make` to prepare C toolchain (Binutils, GCC, musl itself) 3# and builds static libunwind that we distribute for static target. 4# 5# Versions of the toolchain components are configurable in `musl-cross-make/Makefile` and 6# musl unlike GLIBC is forward compatible so upgrading it shouldn't break old distributions. 7# Right now we have: Binutils 2.31.1, GCC 9.2.0, musl 1.2.3. 8 9# ignore-tidy-linelength 10 11set -ex 12 13hide_output() { 14 set +x 15 on_err=" 16echo ERROR: An error was encountered with the build. 17cat /tmp/build.log 18exit 1 19" 20 trap "$on_err" ERR 21 bash -c "while true; do sleep 30; echo \$(date) - building ...; done" & 22 PING_LOOP_PID=$! 23 "$@" &> /tmp/build.log 24 trap - ERR 25 kill $PING_LOOP_PID 26 rm /tmp/build.log 27 set -x 28} 29 30ARCH=$1 31TARGET=$ARCH-linux-musl 32 33# Don't depend on the mirrors of sabotage linux that musl-cross-make uses. 34LINUX_HEADERS_SITE=https://ci-mirrors.rust-lang.org/rustc/sabotage-linux-tarballs 35LINUX_VER=headers-4.19.88 36 37OUTPUT=/usr/local 38shift 39 40# Ancient binutils versions don't understand debug symbols produced by more recent tools. 41# Apparently applying `-fPIC` everywhere allows them to link successfully. 42# Enable debug info. If we don't do so, users can't debug into musl code, 43# debuggers can't walk the stack, etc. Fixes #90103. 44export CFLAGS="-fPIC -g1 $CFLAGS" 45 46git clone https://github.com/richfelker/musl-cross-make # -b v0.9.9 47cd musl-cross-make 48# A version that includes support for building musl 1.2.3 49git checkout fe915821b652a7fa37b34a596f47d8e20bc72338 50 51hide_output make -j$(nproc) TARGET=$TARGET MUSL_VER=1.2.3 LINUX_HEADERS_SITE=$LINUX_HEADERS_SITE LINUX_VER=$LINUX_VER 52hide_output make install TARGET=$TARGET MUSL_VER=1.2.3 LINUX_HEADERS_SITE=$LINUX_HEADERS_SITE LINUX_VER=$LINUX_VER OUTPUT=$OUTPUT 53 54cd - 55 56# Install musl library to make binaries executable 57ln -s $OUTPUT/$TARGET/lib/libc.so /lib/ld-musl-$ARCH.so.1 58echo $OUTPUT/$TARGET/lib >> /etc/ld-musl-$ARCH.path 59 60# Now when musl bootstraps itself create proper toolchain symlinks to make build and tests easier 61if [ "$REPLACE_CC" = "1" ]; then 62 for exec in cc gcc; do 63 ln -s $TARGET-gcc /usr/local/bin/$exec 64 done 65 for exec in cpp c++ g++; do 66 ln -s $TARGET-g++ /usr/local/bin/$exec 67 done 68fi 69