name: stage2-gcc
kind: chunk

configure-commands:
- mkdir o

# In other projects we specify the sysroot location using CPPFLAGS. Here,
# that breaks because GCC compiles stuff for the *build* machine, too ...
# and this requires using the host's compiler, which cannot use the same
# set of CPPFLAGS as the target. If we specify the sysroot using CC instead
# then we don't interfere, because we are only specifying the *host* C
# compiler.
#
# Configure flag notes:
#  1. It's vital that this compiler targets the bootstrap machine
#     (TARGET_STAGE1) so that the stage 1 GCC is used instead of the
#     compiler of the build machine.
#  2. Disable searching /usr/local/include for headers
#  3. This flag causes the correct --sysroot flag to be passed when calling
#     stage 1 GCC.
#  4. C++ is built in stage 3.
#  5. Standard flags. See gcc.morph.
- |
  export STAGE2_SYSROOT="$(dirname $(pwd))"
  export CC="$TARGET_STAGE1-gcc --sysroot=$STAGE2_SYSROOT"
  export LDFLAGS="-Wl,--sysroot=$STAGE2_SYSROOT"
  case "$MORPH_ARCH" in
      armv7lhf) ARCH_CONFIG="--with-arch=armv7-a \
                             --with-cpu=cortex-a9 \
                             --with-tune=cortex-a9 \
                             --with-fpu=vfpv3-d16 \
                             --with-float=hard" ;;
      armv7*) ARCH_CONFIG="--with-arch=armv7-a" ;;
  esac
  cd o && ../configure \
    $ARCH_CONFIG \
    `# [1]` --build=$(sh ../config.guess) \
            --host=$TARGET_STAGE1 \
            --target=$TARGET_STAGE1 \
    --prefix="$PREFIX" \
    `# [2]` --with-local-prefix=$PREFIX \
    `# [3]` --with-build-sysroot="$STAGE2_SYSROOT" \
    --disable-bootstrap \
    --enable-clocale=gnu --enable-shared --enable-threads=posix \
    `# [4]` --enable-languages=c \
    `# [5]` --libdir=$PREFIX/lib \
            --disable-libgomp --disable-multilib --disable-nls \
            --without-cloog --without-ppl \
            --with-mpfr-include="$(pwd)/../mpfr/src" \
            --with-mpfr-lib="$(pwd)/mpfr/src/.libs"

build-commands:
- |
  export STAGE2_SYSROOT="$(dirname $(pwd))"
  cd o && make

install-commands:
- cd o && make DESTDIR="$DESTDIR" install

# Stage 3 builds need to link against this file in the location that
# it will be in the final system, so we make a temporary link now.
#
# On x86_64 GCC resolutely installs its libraries into lib64. To fix this
# would require hobbling the MULTILIB_OSDIRNAMES field in
# gcc/config/i386/t-linux64 and this might break things, so for now we
# tolerate the inconsistency.
- |
  if [ "$(echo $TARGET | cut -c -6)" = "x86_64" ]; then
    libdir=lib64
  else
    libdir=lib
  fi

  install -d "$DESTDIR/lib"
  ln -s "$PREFIX/$libdir/libgcc_s.so" "$DESTDIR/lib/"
  ln -s "$PREFIX/$libdir/libgcc_s.so.1" "$DESTDIR/lib/"