# Maintainer: Jonathon Fernyhough <jonathon+m2x+dev>
# Contributor: Giancarlo Razzolini <grazzolini@archlinux.org>
# Contributor: Frederik Schwan <freswa at archlinux dot org>
# Contributor:  Bartłomiej Piotrowski <bpiotrowski@archlinux.org>
# Contributor: Allan McRae <allan@archlinux.org>
# Contributor: Daniel Kozak <kozzi11@gmail.com>

pkgbase=gcc10
pkgname=($pkgbase gcc10-libs gcc10-fortran)
pkgver=10.5.0
_majorver=${pkgver%%.*}
_islver=0.24
pkgrel=1
pkgdesc='The GNU Compiler Collection (10.x.x)'
arch=(x86_64)
license=(GPL LGPL FDL custom)
url='https://gcc.gnu.org'
makedepends=(binutils doxygen git libmpc python)
checkdepends=(dejagnu inetutils)
options=(!emptydirs !lto !buildflags)
_libdir=usr/lib/gcc/$CHOST/${pkgver%%+*}
source=(https://sourceware.org/pub/gcc/releases/gcc-${pkgver}/gcc-${pkgver}.tar.xz{,.sig}
        https://sourceware.org/pub/gcc/infrastructure/isl-${_islver}.tar.bz2
        c89 c99
)
validpgpkeys=(F3691687D867B81B51CE07D9BBE43771487328A9  # bpiotrowski@archlinux.org
              86CFFCA918CF3AF47147588051E8B148A9999C34  # evangelos@foutrelis.com
              13975A70E63C361C73AE69EF6EEB81F8981C74C7  # richard.guenther@gmail.com
              D3A93CAD751C2AF4F8C7AD516C35B99309B5FA62) # Jakub Jelinek <jakub@redhat.com>
b2sums=('9b71761f4015649514677784443886e59733ac3845f7dfaa4343f46327d36c08c403c444b9e492b870ac0b3f2e3568f972b7700a0ef05a497fb4066079b3143b'
        'SKIP'
        '88a178dad5fe9c33be5ec5fe4ac9abc0e075a86cff9184f75cedb7c47de67ce3be273bd0db72286ba0382f4016e9d74855ead798ad7bccb015b853931731828e'
        'a76d19c7830b0a141302890522086fc1548c177611501caac7e66d576e541b64ca3f6e977de715268a9872dfdd6368a011b92e01f7944ec0088f899ac0d2a2a5'
        '02b655b5668f7dea51c3b3e4ff46d5a4aee5a04ed5e26b98a6470f39c2e98ddc0519bffeeedd982c31ef3c171457e4d1beaff32767d1aedd9346837aac4ec3ee')

prepare() {
  [[ ! -d gcc ]] && ln -s gcc-${pkgver/+/-} gcc
  cd gcc

  # link isl for in-tree build
  ln -s ../isl-${_islver} isl

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

  # Arch Linux installs x86_64 libraries /lib
  sed -i '/m64=/s/lib64/lib/' gcc/config/i386/t-linux64

  # hack! - some configure tests for header files using "$CPP $CPPFLAGS"
  sed -i "/ac_cpp=/s/\$CPPFLAGS/\$CPPFLAGS -O2/" gcc/configure

  mkdir -p "$srcdir/gcc-build"
}

build() {
  cd gcc-build

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

  # Credits @allanmcrae
  # https://github.com/allanmcrae/toolchain/blob/f18604d70c5933c31b51a320978711e4e6791cf1/gcc/PKGBUILD
  # TODO: properly deal with the build issues resulting from this
  CFLAGS=${CFLAGS/-Werror=format-security/}
  CXXFLAGS=${CXXFLAGS/-Werror=format-security/}

  "$srcdir/gcc/configure" --prefix=/usr \
      --libdir=/usr/lib \
      --libexecdir=/usr/lib \
      --mandir=/usr/share/man \
      --infodir=/usr/share/info \
      --with-pkgversion="Arch Linux $pkgver-$pkgrel" \
      --with-bugurl=https://bugs.archlinux.org/ \
      --enable-languages=c,c++,fortran,lto \
      --with-isl \
      --with-linker-hash-style=gnu \
      --with-system-zlib \
      --enable-__cxa_atexit \
      --enable-cet=auto \
      --enable-checking=release \
      --enable-clocale=gnu \
      --enable-default-pie \
      --enable-default-ssp \
      --enable-gnu-indirect-function \
      --enable-gnu-unique-object \
      --enable-linker-build-id \
      --enable-lto \
      --enable-plugin \
      --enable-shared \
      --enable-threads=posix \
      --disable-libssp \
      --disable-libstdcxx-pch \
      --disable-libunwind-exceptions \
      --disable-werror \
      --program-suffix=-${_majorver} \
      --enable-version-specific-runtime-libs \
      --disable-multilib
  LD_PRELOAD='/usr/lib/libstdc++.so' \
  make -s

  # make documentation
  make -s -C $CHOST/libstdc++-v3/doc doc-man-doxygen
}

check() {
  cd gcc-build

  # disable libphobos test to avoid segfaults and other unfunny ways to waste my time
  sed -i '/maybe-check-target-libphobos \\/d' Makefile

  # do not abort on error as some are "expected"
  make -O -k check || true
  "$srcdir/gcc/contrib/test_summary"
}

package_gcc10-libs() {
  pkgdesc='Runtime libraries shipped by GCC (10.x.x)'
  depends=('glibc>=2.27')
  options=(!emptydirs !strip)
  provides=(libgfortran.so libubsan.so libasan.so libtsan.so liblsan.so)

  cd gcc-build
  LD_PRELOAD='/usr/lib/libstdc++.so' \
  make -C $CHOST/libgcc DESTDIR="$pkgdir" install-shared
  mv "${pkgdir}/${_libdir}"/../lib/* "${pkgdir}/${_libdir}"
  rmdir "${pkgdir}/${_libdir}"/../lib
  rm -f "$pkgdir/$_libdir/libgcc_eh.a"

  for lib in libatomic \
             libgfortran \
             libgomp \
             libitm \
             libquadmath \
             libsanitizer/{a,l,ub,t}san \
             libstdc++-v3/src \
             libvtv; do
    make -C $CHOST/$lib DESTDIR="$pkgdir" install-toolexeclibLTLIBRARIES
  done

  make -C $CHOST/libstdc++-v3/po DESTDIR="$pkgdir" install

  # Install Runtime Library Exception
  install -Dm644 "$srcdir/gcc/COPYING.RUNTIME" \
    "$pkgdir/usr/share/licenses/${pkgname}/RUNTIME.LIBRARY.EXCEPTION"

  # remove conflicting files
  rm -rf "${pkgdir}"/usr/share/locale
}

package_gcc10() {
  pkgdesc="The GNU Compiler Collection - C and C++ frontends (10.x.x)"
  depends=("${pkgbase}-libs=$pkgver-$pkgrel" 'binutils>=2.28' libmpc zstd)
  options=(!emptydirs staticlibs)

  cd gcc-build

  make -C gcc DESTDIR="$pkgdir" install-driver install-cpp install-gcc-ar \
    c++.install-common install-headers install-plugin install-lto-wrapper

  install -m755 -t "$pkgdir/${_libdir}/" gcc/{cc1,cc1plus,collect2,lto1,gcov{,-tool}}

  make -C $CHOST/libgcc DESTDIR="$pkgdir" install
  rm -rf "${pkgdir}/${_libdir}"/../lib

  make -C $CHOST/libstdc++-v3/src DESTDIR="$pkgdir" install
  make -C $CHOST/libstdc++-v3/include DESTDIR="$pkgdir" install
  make -C $CHOST/libstdc++-v3/libsupc++ DESTDIR="$pkgdir" install
  make -C $CHOST/libstdc++-v3/python DESTDIR="$pkgdir" install
  rm -f "${pkgdir}/${_libdir}"/libstdc++.so*

  make DESTDIR="$pkgdir" install-fixincludes
  make -C gcc DESTDIR="$pkgdir" install-mkheaders

  make -C lto-plugin DESTDIR="$pkgdir" install
  install -dm755 "$pkgdir"/${_libdir}/bfd-plugins/
  ln -s /${_libdir}/liblto_plugin.so \
    "$pkgdir/${_libdir}/bfd-plugins/"

  make -C $CHOST/libgomp DESTDIR="$pkgdir" install-nodist_{libsubinclude,toolexeclib}HEADERS
  make -C $CHOST/libitm DESTDIR="$pkgdir" install-nodist_toolexeclibHEADERS
  make -C $CHOST/libquadmath DESTDIR="$pkgdir" install-nodist_libsubincludeHEADERS
  make -C $CHOST/libsanitizer DESTDIR="$pkgdir" install-nodist_{saninclude,toolexeclib}HEADERS
  make -C $CHOST/libsanitizer/asan DESTDIR="$pkgdir" install-nodist_toolexeclibHEADERS
  make -C $CHOST/libsanitizer/tsan DESTDIR="$pkgdir" install-nodist_toolexeclibHEADERS
  make -C $CHOST/libsanitizer/lsan DESTDIR="$pkgdir" install-nodist_toolexeclibHEADERS

  make -C libcpp DESTDIR="$pkgdir" install
  make -C gcc DESTDIR="$pkgdir" install-po

  # many packages expect this symlink
  ln -s gcc-${_majorver} "$pkgdir"/usr/bin/cc-${_majorver}

  # POSIX conformance launcher scripts for c89 and c99
  install -Dm755 "$srcdir/c89" "$pkgdir/usr/bin/c89-${_majorver}"
  install -Dm755 "$srcdir/c99" "$pkgdir/usr/bin/c99-${_majorver}"

  # byte-compile python libraries
  python -m compileall "$pkgdir/usr/share/gcc-${pkgver%%+*}/"
  python -O -m compileall "$pkgdir/usr/share/gcc-${pkgver%%+*}/"

  # Install Runtime Library Exception
  install -d "$pkgdir/usr/share/licenses/$pkgname/"
  ln -s /usr/share/licenses/${pkgbase}-libs/RUNTIME.LIBRARY.EXCEPTION \
    "$pkgdir/usr/share/licenses/$pkgname/"

  # Remove conflicting files
  rm -rf "$pkgdir"/usr/share/locale
}

package_gcc10-fortran() {
  pkgdesc='Fortran front-end for GCC (10.x.x)'
  depends=("${pkgbase}=$pkgver-$pkgrel")

  cd gcc-build
  make -C $CHOST/libgfortran DESTDIR="$pkgdir" install-cafexeclibLTLIBRARIES \
    install-{toolexeclibDATA,nodist_fincludeHEADERS,gfor_cHEADERS}
  make -C $CHOST/libgomp DESTDIR="$pkgdir" install-nodist_fincludeHEADERS
  make -C gcc DESTDIR="$pkgdir" fortran.install-common
  install -Dm755 gcc/f951 "$pkgdir/${_libdir}/f951"

  ln -s gfortran-${_majorver} "$pkgdir/usr/bin/f95-${_majorver}"

  # Install Runtime Library Exception
  install -d "$pkgdir/usr/share/licenses/$pkgname/"
  ln -s /usr/share/licenses/${pkgbase}-libs/RUNTIME.LIBRARY.EXCEPTION \
    "$pkgdir/usr/share/licenses/$pkgname/"
}