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

pkgname=({gcc,gcc-libs,lib32-gcc-libs,gcc-ada,gcc-fortran}-static-compat)
pkgver=13.1.1
_majorver=${pkgver%%.*}
pkgrel=1
pkgdesc='The GNU Compiler Collection'
arch=(x86_64)
license=(GPL3 LGPL FDL custom)
url='https://gcc.gnu.org'
makedepends=(
  binutils
  doxygen
  gcc-ada
  git
  glibc-static-compat
  lib32-glibc-static-compat
  libisl
  libmpc
  libxcrypt
  python
  zstd
)
checkdepends=(
  dejagnu
  expect
  inetutils
  python-pytest
  tcl
)
options=(!emptydirs !lto debug)
_prefix=/usr/static-compat
_libdir=usr/static-compat/lib/gcc/$CHOST/${pkgver%%+*}
_commit=9a167ee2f8b9a0859fbab6cfdc276cf1f272effe
source=(git://gcc.gnu.org/git/gcc.git#commit=$_commit
#source=(https://sourceware.org/pub/gcc/releases/gcc-${pkgver}/gcc-${pkgver}.tar.xz{,.sig}
        c89 c99
        gcc-ada-repro.patch
)
validpgpkeys=(F3691687D867B81B51CE07D9BBE43771487328A9  # bpiotrowski@archlinux.org
              86CFFCA918CF3AF47147588051E8B148A9999C34  # evangelos@foutrelis.com
              13975A70E63C361C73AE69EF6EEB81F8981C74C7  # richard.guenther@gmail.com
              D3A93CAD751C2AF4F8C7AD516C35B99309B5FA62) # Jakub Jelinek <jakub@redhat.com>
#sha256sums=('e549cf9cf3594a00e27b6589d4322d70e0720cdd213f39beb4181e06926230ff'
#            'SKIP'
sha256sums=('SKIP'
            'de48736f6e4153f03d0a5d38ceb6c6fdb7f054e8f47ddd6af0a3dbf14f27b931'
            '2513c6d9984dd0a2058557bf00f06d8d5181734e41dcfe07be7ed86f2959622a'
            '1773f5137f08ac1f48f0f7297e324d5d868d55201c03068670ee4602babdef2f')

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

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

  # Arch Linux installs x86_64 libraries in lib and i686 ones in lib32
  sed -i '/m64=/s/lib64/lib/' gcc/config/i386/t-linux64
  sed -i 's|MULTILIB_DIRNAMES .*|MULTILIB_DIRNAMES = 64 32|' gcc/config/i386/t-linux64
  sed -i 's|m32=.*|m32=../lib32\$\(call if_multiarch,:i386-linux-gnu\)|' gcc/config/i386/t-linux64

  # Reproducible gcc-ada
  patch -Np0 < "$srcdir/gcc-ada-repro.patch"

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

build() {
  local _confflags="--prefix=$_prefix \
      --libdir=$_prefix/lib \
      --libexecdir=$_prefix/lib \
      --mandir=$_prefix/share/man \
      --infodir=$_prefix/share/info \
      --with-sysroot=$_prefix \
      --with-native-system-header-dir="/include" \
      --with-bugurl=https://github.com/Martchus/PKGBUILDs/issues \
      --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 \
      --disable-bootstrap \
      --enable-checking=release \
      --enable-multilib \
      --enable-plugin \
      --enable-shared \
      --enable-static \
      --enable-threads=posix \
      --disable-libssp \
      --disable-libstdcxx-pch \
      --disable-werror \
      --with-build-config=bootstrap-lto \
      --enable-link-serialization=1"

  cd gcc-build

  # 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/}

  # Fix the check for limits.h and certain other checks by dropping the fortify flag from CPPFLAGS
  # note: Otherwise libiberty/config.h lacks HAVE_LIMITS_H and the compilation runs into errors like:
  #  /build/gcc-static-compat/src/gcc/libiberty/fibheap.c:38:25: error: ‘LONG_MIN’ undeclared (first use in this function)
  #  38 | #define FIBHEAPKEY_MIN  LONG_MIN
  #     |                         ^~~~~~~~
  #  /build/gcc-static-compat/src/gcc/libiberty/fibheap.c:220:30: note: in expansion of macro ‘FIBHEAPKEY_MIN’
  #  220 |   if (okey == key && okey != FIBHEAPKEY_MIN)
  #      |                              ^~~~~~~~~~~~~~
  #  /build/gcc-static-compat/src/gcc/libiberty/fibheap.c:36:1: note: ‘LONG_MIN’ is defined in header ‘<limits.h>’; did you forget to ‘#include <limits.h>’?
  #   35 | #include "fibheap.h"
  #  +++ |+#include <limits.h>
  CPPFLAGS=${CPPFLAGS/-D_FORTIFY_SOURCE=2}

  "$srcdir/gcc/configure" \
    --enable-languages=ada,c,c++,fortran,lto \
    $_confflags
  make
}

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_gcc-libs-static-compat() {
  pkgdesc='Runtime libraries shipped by GCC'
  depends=('glibc-static-compat>=2.26')
  options=(!emptydirs !strip)

  cd gcc-build
  make -C $CHOST/libgcc DESTDIR="$pkgdir" install-shared
  rm -f "$pkgdir/$_libdir/libgcc_eh.a"

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

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

  rm -rf "$pkgdir"/$_libdir/include/d/
  rm -f "$pkgdir"$_prefix/lib/libgphobos.spec

  for lib in libgomp \
             libitm \
             libquadmath; do
    make -C $CHOST/$lib DESTDIR="$pkgdir" install-info
  done
  rm -r "$pkgdir"$_prefix/share/info/dir

  # remove files provided by lib32-gcc-libs
  rm -rf "$pkgdir"$_prefix/lib32/

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

package_gcc-static-compat() {
  pkgdesc="The GNU Compiler Collection - C and C++ frontends"
  depends=("gcc-libs-static-compat=$pkgver-$pkgrel" 'binutils>=2.28' libmpc zstd libisl.so)
  groups=('base-devel')
  optdepends=('lib32-gcc-libs-static-compat: for generating code for 32-bit ABI')
  options=(!emptydirs staticlibs debug)

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

  make -C $CHOST/libgcc DESTDIR="$pkgdir" install
  make -C $CHOST/32/libgcc DESTDIR="$pkgdir" install
  rm -f "$pkgdir"$_prefix/lib{,32}/libgcc_s.so*

  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
  make -C $CHOST/32/libstdc++-v3/src DESTDIR="$pkgdir" install
  make -C $CHOST/32/libstdc++-v3/include DESTDIR="$pkgdir" install
  make -C $CHOST/32/libstdc++-v3/libsupc++ DESTDIR="$pkgdir" install

  make DESTDIR="$pkgdir" install-libcc1
  install -d "$pkgdir$_prefix/share/gdb/auto-load/usr/lib"
  mv "$pkgdir"$_prefix/lib/libstdc++.so.6.*-gdb.py \
    "$pkgdir$_prefix/share/gdb/auto-load/usr/lib/"
  rm "$pkgdir"$_prefix/lib{,32}/libstdc++.so*

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

  make -C lto-plugin DESTDIR="$pkgdir" install
  install -dm755 "$pkgdir"$_prefix/lib/bfd-plugins/
  ln -s /${_libdir}/liblto_plugin.so \
    "$pkgdir$_prefix/lib/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 $CHOST/32/libgomp DESTDIR="$pkgdir" install-nodist_toolexeclibHEADERS
  make -C $CHOST/32/libitm DESTDIR="$pkgdir" install-nodist_toolexeclibHEADERS
  make -C $CHOST/32/libsanitizer DESTDIR="$pkgdir" install-nodist_{saninclude,toolexeclib}HEADERS
  make -C $CHOST/32/libsanitizer/asan DESTDIR="$pkgdir" install-nodist_toolexeclibHEADERS

  make -C gcc DESTDIR="$pkgdir" install-man install-info
  rm "$pkgdir"$_prefix/share/man/man1/gfortran.1
  rm "$pkgdir"$_prefix/share/info/{gfortran,gnat-style,gnat_rm,gnat_ugn}.info
  rm -r "$pkgdir"$_prefix/share/info/dir

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

  # many packages expect this symlink
  ln -s gcc "$pkgdir"$_prefix/bin/cc

  # POSIX conformance launcher scripts for c89 and c99
  install -Dm755 "$srcdir/c89" "$pkgdir$_prefix/bin/c89"
  install -Dm755 "$srcdir/c99" "$pkgdir$_prefix/bin/c99"

  # install the libstdc++ man pages
  make -C $CHOST/libstdc++-v3/doc DESTDIR="$pkgdir" doc-install-man

  # remove files provided by lib32-gcc-libs
  rm -f "$pkgdir"$_prefix/lib32/lib{stdc++,gcc_s}.so

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

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

package_gcc-fortran-static-compat() {
  pkgdesc='Fortran front-end for GCC'
  depends=("gcc-static-compat=$pkgver-$pkgrel" libisl.so)

  cd gcc-build
  make -C $CHOST/libgfortran DESTDIR="$pkgdir" install-cafexeclibLTLIBRARIES \
    install-{toolexeclibDATA,nodist_fincludeHEADERS,gfor_cHEADERS}
  make -C $CHOST/32/libgfortran DESTDIR="$pkgdir" install-cafexeclibLTLIBRARIES \
    install-{toolexeclibDATA,nodist_fincludeHEADERS,gfor_cHEADERS}
  make -C $CHOST/libgomp DESTDIR="$pkgdir" install-nodist_fincludeHEADERS
  make -C gcc DESTDIR="$pkgdir" fortran.install-{common,man,info}
  install -Dm755 gcc/f951 "$pkgdir/${_libdir}/f951"
  rm -r "$pkgdir"$_prefix/share/info/dir

  ln -s gfortran "$pkgdir$_prefix/bin/f95"

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

package_gcc-ada-static-compat() {
  pkgdesc='Ada front-end for GCC (GNAT)'
  depends=("gcc-static-compat=$pkgver-$pkgrel" libisl.so)
  options=(!emptydirs staticlibs debug)

  cd gcc-build/gcc
  make DESTDIR="$pkgdir" ada.install-{common,info}
  install -m755 gnat1 "$pkgdir/${_libdir}"

  cd "$srcdir"/gcc-build/$CHOST/libada
  make DESTDIR="${pkgdir}" INSTALL="install" \
    INSTALL_DATA="install -m644" install-libada

  cd "$srcdir"/gcc-build/$CHOST/32/libada
  make DESTDIR="${pkgdir}" INSTALL="install" \
    INSTALL_DATA="install -m644" install-libada

  ln -s gcc "$pkgdir$_prefix/bin/gnatgcc"

  # insist on dynamic linking, but keep static libraries because gnatmake complains
  mv "$pkgdir"/${_libdir}/adalib/libgna{rl,t}-${_majorver}.so "$pkgdir$_prefix/lib"
  ln -s libgnarl-${_majorver}.so "$pkgdir$_prefix/lib/libgnarl.so"
  ln -s libgnat-${_majorver}.so "$pkgdir$_prefix/lib/libgnat.so"
  rm -f "$pkgdir"/${_libdir}/adalib/libgna{rl,t}.so
  rm -r "$pkgdir"$_prefix/share/info/dir

  install -d "$pkgdir$_prefix/lib32/"
  mv "$pkgdir"/${_libdir}/32/adalib/libgna{rl,t}-${_majorver}.so "$pkgdir$_prefix/lib32"
  ln -s libgnarl-${_majorver}.so "$pkgdir$_prefix/lib32/libgnarl.so"
  ln -s libgnat-${_majorver}.so "$pkgdir$_prefix/lib32/libgnat.so"
  rm -f "$pkgdir"/${_libdir}/32/adalib/libgna{rl,t}.so

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

package_lib32-gcc-libs-static-compat() {
  pkgdesc='32-bit runtime libraries shipped by GCC'
  depends=('lib32-glibc>=2.26')
  options=(!emptydirs !strip)

  cd gcc-build

  make -C $CHOST/32/libgcc DESTDIR="$pkgdir" install-shared
  rm -f "$pkgdir/$_libdir/32/libgcc_eh.a"

  for lib in libatomic \
             libquadmath \
             libgfortran \
             libgomp \
             libitm \
             libsanitizer/{a,l,ub}san \
             libstdc++-v3/src \
             libvtv; do
    make -C $CHOST/32/$lib DESTDIR="$pkgdir" install-toolexeclibLTLIBRARIES
  done

  #make -C $CHOST/32/libobjc DESTDIR="$pkgdir" install-libs

  rm -f "$pkgdir"$_prefix/lib32/libgphobos.spec

  # remove files provided by gcc-libs
  rm -rf "$pkgdir"$_prefix/lib

  # Install Runtime Library Exception
  install -Dm644 "$srcdir/gcc/COPYING.RUNTIME" \
    "$pkgdir$_prefix/share/licenses/lib32-gcc-libs/RUNTIME.LIBRARY.EXCEPTION"
}