src/ci/docker/scripts/musl-toolchain.sh

   1 # This script runs `musl-cross-make` to prepare C toolchain (Binutils, GCC, musl itself)
   2 # and builds static libunwind that we distribute for static target.
   3 #
   4 # Versions of the toolchain components are configurable in `musl-cross-make/Makefile` and
   5 # musl unlike GLIBC is forward compatible so upgrading it shouldn't break old distributions.
   6 # Right now we have: Binutils 2.27, GCC 6.3.0, musl 1.1.18
   7 set -ex
   8
   9 hide_output() {
  10   set +x
  11   on_err="
  12 echo ERROR: An error was encountered with the build.
  13 cat /tmp/build.log
  14 exit 1
  15 "
  16   trap "$on_err" ERR
  17   bash -c "while true; do sleep 30; echo \$(date) - building ...; done" &
  18   PING_LOOP_PID=$!
  19   $@ &> /tmp/build.log
  20   trap - ERR
  21   kill $PING_LOOP_PID
  22   rm /tmp/build.log
  23   set -x
  24 }
  25
  26 ARCH=$1
  27 TARGET=$ARCH-linux-musl
  28
  29 OUTPUT=/usr/local
  30 shift
  31
  32 # Ancient binutils versions don't understand debug symbols produced by more recent tools.
  33 # Apparently applying `-fPIC` everywhere allows them to link successfully.
  34 export CFLAGS="-fPIC $CFLAGS"
  35
  36 git clone https://github.com/richfelker/musl-cross-make -b v0.9.7
  37 cd musl-cross-make
  38
  39 hide_output make -j$(nproc) TARGET=$TARGET
  40 hide_output make install TARGET=$TARGET OUTPUT=$OUTPUT
  41
  42 cd -
  43
  44 # Install musl library to make binaries executable
  45 ln -s $OUTPUT/$TARGET/lib/libc.so /lib/ld-musl-$ARCH.so.1
  46 echo $OUTPUT/$TARGET/lib >> /etc/ld-musl-$ARCH.path
  47
  48
  49 export CC=$TARGET-gcc
  50 export CXX=$TARGET-g++
  51
  52 LLVM=70
  53
  54 # may have been downloaded in a previous run
  55 if [ ! -d libunwind-release_$LLVM ]; then
  56   curl -L https://github.com/llvm-mirror/llvm/archive/release_$LLVM.tar.gz | tar xzf -
  57   curl -L https://github.com/llvm-mirror/libunwind/archive/release_$LLVM.tar.gz | tar xzf -
  58 fi
  59
  60 # fixme(mati865): Replace it with https://github.com/rust-lang/rust/pull/59089
  61 mkdir libunwind-build
  62 cd libunwind-build
  63 cmake ../libunwind-release_$LLVM \
  64           -DLLVM_PATH=/build/llvm-release_$LLVM \
  65           -DLIBUNWIND_ENABLE_SHARED=0 \
  66           -DCMAKE_C_COMPILER=$CC \
  67           -DCMAKE_CXX_COMPILER=$CXX \
  68           -DCMAKE_C_FLAGS="$CFLAGS" \
  69           -DCMAKE_CXX_FLAGS="$CXXFLAGS"
  70
  71 hide_output make -j$(nproc)
  72 cp lib/libunwind.a $OUTPUT/$TARGET/lib
  73 cd - && rm -rf libunwind-build