# Maintainer:  Chris Severance aur.severach aATt spamgourmet dott com
# Contributor: Felix Schindler <felix at schindlerfaimly dot de>
# Contributor: Allan McRae <allan@archlinux.org>
#
# This PKGBUILD has been maintained at https://github.com/ftalbrecht/aur
# in the gcc48 branch

# toolchain build order: linux-api-headers->glibc->binutils->gcc->binutils->glibc
# NOTE: libtool requires rebuilt with each new gcc version

set -u
_pkgver='4.8'
pkgname="gcc${_pkgver//\./}"
pkgver="${_pkgver}.5"
pkgrel='1'
pkgdesc="The GNU Compiler Collection - C and C++ frontends (${_pkgver}.x)"
arch=('i686' 'x86_64')
url='http://gcc.gnu.org'
license=('GPL' 'LGPL' 'FDL' 'custom')
depends=('zlib')
makedepends=('binutils>=2.24' 'libmpc' 'doxygen')
makedepends+=('cloog' 'texinfo')
checkdepends=('dejagnu' 'inetutils')
options=('!emptydirs' 'staticlibs' '!libtool')
source=(
  "ftp://gcc.gnu.org/pub/gcc/releases/gcc-${pkgver}/gcc-${pkgver}.tar.bz2"
  'gcc-4.9-fix-build-with-gcc-6.patch'
  'gcc.texi.49.patch'
)
sha256sums=('22fb1e7e0f68a63cee631d85b20461d1ea6bda162f03096350e38c8d427ecf23'
            'd775a053fad367f5490111038fde7c875b4e842919d2d197f95b915e1ae562a9'
            '93b8865cb61f455df807de90f852dc488753d4309d7a1d8f7e7f1a4efe37ffa4')
PKGEXT='.pkg.tar.gz'

  _basedir="gcc-${pkgver}"

#_libdir="usr/lib/gcc/${CHOST}/${pkgver}"

prepare() {
  set -u
  cd "${_basedir}"

  # Do not run fixincludes
  sed -e 's@\./fixinc\.sh@-c true@' -i 'gcc/Makefile.in'

  # fix build with GCC 6
  patch -p1 < "${srcdir}/gcc-4.9-fix-build-with-gcc-6.patch"

  # Update gcc.texi to gcc49 version, needed as of texinfo>=6.3 and possibly texinfo=6.2
  patch -p0 -c < "${srcdir}/gcc.texi.49.patch"

  # Arch Linux installs x86_64 libraries /lib
  case "${CARCH}" in
  'x86_64') sed -e '/m64=/ s/lib64/lib/' -i 'gcc/config/i386/t-linux64' ;;
  esac

  echo "${pkgver}" > 'gcc/BASE-VER'

  # hack! - some configure tests for header files using "$CPP $CPPFLAGS"
  sed -e '/^ac_cpp=/ s/\$CPPFLAGS/\$CPPFLAGS -O2/' -i {libiberty,gcc}/configure

  # installing libiberty headers is broken
  # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56780#c6
  sed -e 's#@target_header_dir@#libiberty#' -i 'libiberty/Makefile.in'

  # Doesn't like FORTIFY_SOURCE
  export CPPFLAGS="${CPPFLAGS//-D_FORTIFY_SOURCE=?/}"

  # Doesn't like -fstack-protector-strong
  export CFLAGS="${CFLAGS//-fstack-protector-strong/-fstack-protector}"
  export CXXFLAGS="${CXXFLAGS//-fstack-protector-strong/-fstack-protector}"

  # using -pipe causes spurious test-suite failures
  # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48565
  export CFLAGS="${CFLAGS/-pipe/}"
  export CXXFLAGS="${CXXFLAGS/-pipe/}"

  # Flags from new compilers that old compilers don't recognize
  export CFLAGS="${CFLAGS/-fno-plt/}"
  export CXXFLAGS="${CXXFLAGS/-fno-plt/}"

  export CFLAGS="${CFLAGS/-Wformat-overflow=[0-9]/}"
  export CXXFLAGS="${CXXFLAGS/-Wformat-overflow=[0-9]/}"

  rm -rf 'gcc-build'
  mkdir 'gcc-build'
  cd 'gcc-build'

  set +u
}

build() {
  set -u
  cd "${_basedir}/gcc-build"

  if [ ! -s 'Makefile' ]; then
    # The following options are one per line, mostly sorted so they are easy to diff compare to other gcc packages.
    ../configure \
      --build="${CHOST}" \
      --disable-libstdcxx-pch \
      --disable-libunwind-exceptions \
      --disable-multilib \
      --disable-werror \
      --enable-__cxa_atexit \
      --enable-checking='release' \
      --enable-clocale='gnu' \
      --enable-cloog-backend='isl' \
      --enable-gnu-unique-object \
      --enable-gold \
      --enable-languages='c,c++,fortran' \
      --enable-ld='default' \
      --enable-linker-build-id \
      --enable-lto \
      --enable-plugin \
      --enable-shared \
      --enable-threads='posix' \
      --enable-version-specific-runtime-libs \
      --infodir='/usr/share/info' \
      --libdir='/usr/lib' \
      --libexecdir='/usr/lib' \
      --mandir='/usr/share/man' \
      --program-suffix="-${_pkgver}" \
      --with-bugurl='https://bugs.archlinux.org/' \
      --with-plugin-ld='ld.gold' \
      --with-ppl \
      --with-system-zlib \
      --prefix='/usr'
#      CXX='g++-4.9' CC='gcc-4.9'
  fi

  local _nproc="$(nproc)"; _nproc=$((_nproc>8?8:_nproc))
  #LD_PRELOAD='/usr/lib/libstdc++.so' \\
  nice make -j "${_nproc}" # -s

  # make documentation
  make -s -j1 -C "${CHOST}/libstdc++-v3/doc" 'doc-man-doxygen'
  set +u
}

_fn_check() {
  set -u
  cd "${_basedir}/gcc-build"

  # increase stack size to prevent test failures
  # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31827
  ulimit -s 32768

  # do not abort on error as some are "expected"
  make -k check || :
  "${srcdir}/${_basedir}/contrib/test_summary"
  set +u
}

package() {
  set -u
  cd "${_basedir}/gcc-build"

  #LD_PRELOAD='/usr/lib/libstdc++.so' \\
  make -s -j1 DESTDIR="${pkgdir}" install

  ## Lazy way of dealing with conflicting man and info pages and locales...
  rm -rf "${pkgdir}/usr"/{share,include}/
  find "${pkgdir}/" -name '*iberty*' -exec rm '{}' '+'

  # Move potentially conflicting stuff to version specific subdirectory
  case "${CARCH}" in
  'x86_64') mv "${pkgdir}/usr/lib/gcc/${CHOST}"/lib*/ "${pkgdir}/usr/lib/gcc/${CHOST}/${pkgver}/" ;;
  esac
  #mv "${pkgdir}/usr/lib"/lib* "${pkgdir}/usr/lib/gcc/${CHOST}/${pkgver}/"

  # Install Runtime Library Exception
  install -Dpm644 '../COPYING.RUNTIME' \
    "${pkgdir}/usr/share/licenses/${pkgname}/RUNTIME.LIBRARY.EXCEPTION" || :
  set +u
}
set +u