azure-build-libc.yaml

###############################################################################
#
# This pipeline builds newlib with the same flags as the official toolchain,
# but adds -funwind-tables so we can have proper unwind info inside libc
#
###############################################################################
variables:
  source_url: 'https://developer.arm.com/-/media/Files/downloads/gnu-rm/8-2018q4/gcc-arm-none-eabi-8-2018-q4-major-src.tar.bz2'
  source_directory: 'gcc-arm-none-eabi-8-2018-q4-major'

jobs:
- job: BuildLibc
  pool:
    vmImage: 'ubuntu-16.04'
  timeoutInMinutes: 0
  steps:
    - bash: |
        sudo apt-get install software-properties-common
        sudo dpkg --add-architecture i386
        sudo add-apt-repository ppa:team-gcc-arm-embedded/ppa
        sudo apt-get update
        sudo apt-get install build-essential autoconf autogen bison dejagnu flex flip gawk git gperf gzip \
                             nsis openssh-client p7zip-full perl python-dev libisl-dev scons tcl tofrodos \
                             wget libncurses5-dev pv
        sudo apt-get install gcc-arm-embedded
      displayName: Install apt packages
    - bash: |
        curl -L $(source_url) -o $(source_directory).tar.bz2
        pv -f $(source_directory).tar.bz2 | tar -xjf -
      displayName: Download/extract arm-none-eabi-gcc source
    - bash: |
        sed -i '95s/TERM|\\/TERM|agent.jobstatus|\\/' ./build-common.sh
        sed -i '302s/http:\/\/www.mr511.de\/software\//https:\/\/github.com\/gnu-mcu-eclipse\/files\/raw\/master\/libs\//' ./build-common.sh
      displayName: Edit ./build-common.sh
      workingDirectory: $(source_directory)
    - bash: |
        sed -i "294s/.*/saveenvvar CFLAGS_FOR_TARGET '-g -O2 -ffunction-sections -fdata-sections -funwind-tables'/" ./build-toolchain.sh
        head -n 316 ./build-toolchain.sh > ./build-toolchain.sh
      displayName: Edit ./build-toolchain.sh
      workingDirectory: $(source_directory)
    - bash: |
        ./install-sources.sh --skip_steps=mingw32
      displayName: Install sources
      workingDirectory: $(source_directory)
    - bash: |
        ./build-prerequisites.sh --skip_steps=mingw32
      displayName: Build prerequisites
      workingDirectory: $(source_directory)
    - bash: |
        export CFLAGS_FOR_TARGET='-g -O2 -ffunction-sections -fdata-sections -funwind-tables'
        export ROOT=`pwd`
        mkdir -p $ROOT/build-native/newlib
        pushd $ROOT/build-native/newlib
        $ROOT/src/newlib/configure                                                                          \
          --build="`uname -m | sed 'y/XI/xi/'`"-linux-gnu --host="`uname -m | sed 'y/XI/xi/'`"-linux-gnu    \
          --target=arm-none-eabi                                                                            \
          --prefix=$ROOT/newlib                                                                             \
          --enable-newlib-io-long-long                                                                      \
          --enable-newlib-io-c99-formats                                                                    \
          --enable-newlib-register-fini                                                                     \
          --enable-newlib-retargetable-locking                                                              \
          --disable-newlib-supplied-syscalls                                                                \
          --disable-nls                                                                                     \

        make -j`grep ^processor /proc/cpuinfo|wc -l`
        make install

        ls -R $ROOT/newlib
        ls -R $ROOT/build-native/newlib

        cp $ROOT/newlib/arm-none-eabi/lib/thumb/v7-ar/libc.a $(Build.ArtifactStagingDirectory)
        cp $ROOT/newlib/arm-none-eabi/lib/thumb/v7-ar/libm.a $(Build.ArtifactStagingDirectory)
        ls $(Build.ArtifactStagingDirectory)

        TARGET_LIBRARIES=`find $(Build.ArtifactStagingDirectory) -name \*.a`
        for target_lib in $TARGET_LIBRARIES ; do
          echo Stripping $target_lib
          arm-none-eabi-objcopy -R .comment -R .note -R .debug_info -R .debug_aranges -R .debug_pubnames -R .debug_pubtypes -R .debug_abbrev -R .debug_line -R .debug_str -R .debug_ranges -R .debug_loc $target_lib || true
        done
      displayName: Build toolchain
      workingDirectory: $(source_directory)
    - task: PublishPipelineArtifact@0
      inputs:
        artifactName: 'newlib'
        targetPath: $(Build.ArtifactStagingDirectory)