kind: manual

description:
  Full featured native compiler which builds everything after gnu-toolchain.bst

sources:
- kind: git
  url: upstream:gcc-tarball
  track: baserock/gcc-7.1.0
  ref: 3b0dbcfa2e5d12bd80cab1b35f08653d61fe7838

depends:
- filename: gnu-toolchain/stage2.bst
  type: build
- gnu-toolchain/fhs-dirs.bst
- gnu-toolchain/linux-api-headers.bst
- gnu-toolchain/glibc.bst
- gnu-toolchain/zlib.bst
- gnu-toolchain/m4-tarball.bst

variables:
  gcc-arch-flags: ''

  (?):
    # ARM platforms vary a lot even within a single architecture revision,
    # and require tweaks such as this to produce a useful compiler.
    # This is a default configuration that has worked for some targets.
    - arch in ["armv7b", "armv7l"]:
        gcc-arch-flags: --with-arch=armv7-a
    - arch in ["armv7blhf", "armv7lhf"]:
        gcc-arch-flags: >
                        --with-arch=armv7-a
                        --with-cpu=cortex-a9
                        --with-tune=cortex-a9
                        --with-fpu=vfpv3-d16
                        --with-float=hard

environment:
  PATH: /usr/bin:/bin:/usr/sbin:/sbin:/tools/bin:/tools/sbin

config:

  configure-commands:
  - mkdir o

  # Configure flag notes:    
  #   1. An attempt to stop anything going in %{prefix}/lib64 (which doesn't
  #      fully work; we will need to hobble the multilib configuration in
  #      config/i386/t-linux64 if we really want to kill /lib64).
  #   2. Avoid having more than one copy of ZLib in use on the system
  #   3. Multilib does not make sense in Baserock.
  - |
    cd o && ../configure %{gcc-arch-flags}                      \
              --prefix="%{prefix}"                              \
      `# [1]` --libdir=%{prefix}/lib                            \
              --disable-bootstrap                               \
      `# [2]` --with-system-zlib                                \
      `# [3]` --disable-multilib                                \
              --enable-languages=c,c++,fortran

  build-commands:
  - cd o && make

  install-commands:
  - cd o && make DESTDIR="%{install-root}" install
  - ln -s gcc "%{install-root}%{prefix}/bin/cc"
  - |
    for fortran_alias in f77 f90 f95; do
      ln -s gfortran "%{install-root}%{prefix}/bin/$fortran_alias"
    done

  strip-commands:
  - |
    %{stage3-strip-binaries}

  (?):
    # GCC is not passing the correct host/target flags to GMP's configure
    # script, which causes it to not use the machine-dependent code for
    # the platform and use the generic one instead.  However, the generic
    # code results on an undefined reference to `__gmpn_invert_limb' in
    # ARMv7.  Fix the invocation of GMP's configure script so that GMP can
    # use the machine-dependent code.
    - arch.startswith("armv5"):
        build-commands:
          (<):
          - sed -i "s/--host=none/--host=armv5/" o/Makefile
          - sed -i "s/--target=none/--target=armv5/" o/Makefile
    - arch.startswith("armv7"):
        build-commands:
          (<):
          - sed -i "s/--host=none/--host=armv7a/" o/Makefile
          - sed -i "s/--target=none/--target=armv7a/" o/Makefile
