gcc: update to 7.3.0

1 files changed, 277 insertions, 217 deletions

diff --git a/abs/core/gcc/PKGBUILD b/abs/core/gcc/PKGBUILD
index b32797b..66aed86 100644
--- a/abs/core/gcc/PKGBUILD
+++ b/abs/core/gcc/PKGBUILD
@@ -1,40 +1,58 @@
 # $Id$
-# Maintainer: Allan McRae <allan@archlinux.org>
+# Maintainer:  Bartłomiej Piotrowski <bpiotrowski@archlinux.org>
+# Contributor: Allan McRae <allan@archlinux.org>
 
 # toolchain build order: linux-api-headers->glibc->binutils->gcc->binutils->glibc
 # NOTE: libtool requires rebuilt with each new gcc version
 
-pkgname=('gcc' 'gcc-libs' 'gcc-fortran' 'gcc-objc' 'gcc-ada' 'gcc-go')
-pkgver=5.3.0
-_pkgver=5
-_islver=0.15
-pkgrel=5
-_snapshot=5-20160209
-pkgdesc="The GNU Compiler Collection"
-arch=('i686' 'x86_64')
-license=('GPL' 'LGPL' 'FDL' 'custom')
-url="http://gcc.gnu.org"
-makedepends=('binutils>=2.26' 'libmpc' 'gcc-ada' 'doxygen')
-checkdepends=('dejagnu' 'inetutils')
-options=('!emptydirs')
-source=(#ftp://gcc.gnu.org/pub/gcc/releases/gcc-${pkgver}/gcc-${pkgver}.tar.bz2
-        ftp://gcc.gnu.org/pub/gcc/snapshots/${_snapshot}/gcc-${_snapshot}.tar.bz2
+pkgname=(gcc gcc-libs gcc-fortran gcc-objc gcc-ada gcc-go lib32-gcc-libs)
+pkgver=7.3.0
+_majorver=${pkgver:0:1}
+_islver=0.18
+pkgrel=1
+pkgdesc='The GNU Compiler Collection'
+arch=(x86_64)
+license=(GPL LGPL FDL custom)
+url='http://gcc.gnu.org'
+makedepends=(binutils libmpc gcc-ada doxygen lib32-glibc lib32-gcc-libs)
+checkdepends=(dejagnu inetutils)
+options=(!emptydirs)
+#source=(https://sources.archlinux.org/other/gcc/gcc-${pkgver/+/-}.tar.xz{,.sig}
+source=(https://ftp.gnu.org/gnu/gcc/gcc-$pkgver/gcc-$pkgver.tar.xz{,.sig}
         http://isl.gforge.inria.fr/isl-${_islver}.tar.bz2
-        Unlink-the-response-file.patch)
-md5sums=('499161c65b639aa5c12a14944582b7ec'
-         '8428efbbc6f6e2810ce5c1ba73ecf98c'
-         '1f4d4ef71004261376d26d5ba6a84499')
-
-if [ -n "${_snapshot}" ]; then
-  _basedir=gcc-${_snapshot}
-else
-  _basedir=gcc-${pkgver}
-fi
-
-_libdir="usr/lib/gcc/$CHOST/$pkgver"
+        c89 c99)
+validpgpkeys=(F3691687D867B81B51CE07D9BBE43771487328A9  # bpiotrowski@archlinux.org
+              13975A70E63C361C73AE69EF6EEB81F8981C74C7) # richard.guenther@gmail.com
+sha256sums=('832ca6ae04636adbb430e865a1451adf6979ab44ca1c8374f61fba65645ce15c'
+            'SKIP'
+            '6b8b0fd7f81d0a957beb3679c81bbb34ccc7568d5682844d8924424a0dadcb1b'
+            'de48736f6e4153f03d0a5d38ceb6c6fdb7f054e8f47ddd6af0a3dbf14f27b931'
+            '2513c6d9984dd0a2058557bf00f06d8d5181734e41dcfe07be7ed86f2959622a')
+
+_svnrev=256757
+_svnurl=svn://gcc.gnu.org/svn/gcc/branches/gcc-${_majorver}-branch
+_libdir=usr/lib/gcc/$CHOST/${pkgver%%+*}
+
+snapshot() {
+  svn export -r${_svnrev} ${_svnurl} gcc-r${_svnrev}
+
+  local datestamp basever _pkgver
+  basever=$(< gcc-r${_svnrev}/gcc/BASE-VER)
+  datestamp=$(< gcc-r${_svnrev}/gcc/DATESTAMP)
+  _pkgver=${basever}-${datestamp}
+
+  mv gcc-r${_svnrev} gcc-${_pkgver}
+  tar cf - gcc-${_pkgver} | xz > gcc-${_pkgver}.tar.xz
+  gpg -b gcc-${_pkgver}.tar.xz
+  scp gcc-${_pkgver}.tar.xz{,.sig} sources.archlinux.org:/srv/ftp/other/gcc/
+
+  echo
+  echo "pkgver=${_pkgver/-/+}"
+}
 
 prepare() {
-  cd ${srcdir}/${_basedir}
+  ln -s gcc-${pkgver/+/-} gcc
+  cd gcc
 
   # link isl for in-tree build
   ln -s ../isl-${_islver} isl
@@ -43,73 +61,78 @@ prepare() {
   sed -i 's@\./fixinc\.sh@-c true@' gcc/Makefile.in
 
   # Arch Linux installs x86_64 libraries /lib
-  [[ $CARCH == "x86_64" ]] && sed -i '/m64=/s/lib64/lib/' gcc/config/i386/t-linux64
-
-  echo ${pkgver} > gcc/BASE-VER
+  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/" {libiberty,gcc}/configure
 
-  # https://bugs.archlinux.org/task/47874 - commit f591a95d
-  patch -p1 -i $srcdir/Unlink-the-response-file.patch
-
-  mkdir ${srcdir}/gcc-build
+  mkdir -p "$srcdir/gcc-build"
 }
 
 build() {
-  cd ${srcdir}/gcc-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/}
 
-  ${srcdir}/${_basedir}/configure --prefix=/usr \
-      --libdir=/usr/lib --libexecdir=/usr/lib \
-      --mandir=/usr/share/man --infodir=/usr/share/info \
+  "$srcdir/gcc/configure" --prefix=/usr \
+      --libdir=/usr/lib \
+      --libexecdir=/usr/lib \
+      --mandir=/usr/share/man \
+      --infodir=/usr/share/info \
       --with-bugurl=https://bugs.archlinux.org/ \
       --enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ \
-      --enable-shared --enable-threads=posix --enable-libmpx \
-      --with-system-zlib --with-isl --enable-__cxa_atexit \
-      --disable-libunwind-exceptions --enable-clocale=gnu \
-      --disable-libstdcxx-pch --disable-libssp \
-      --enable-gnu-unique-object --enable-linker-build-id \
-      --enable-lto --enable-plugin --enable-install-libiberty \
-      --with-linker-hash-style=gnu --enable-gnu-indirect-function \
-      --disable-multilib --disable-werror \
-      --enable-checking=release
+      --enable-shared \
+      --enable-threads=posix \
+      --enable-libmpx \
+      --with-system-zlib \
+      --with-isl \
+      --enable-__cxa_atexit \
+      --disable-libunwind-exceptions \
+      --enable-clocale=gnu \
+      --disable-libstdcxx-pch \
+      --disable-libssp \
+      --enable-gnu-unique-object \
+      --enable-linker-build-id \
+      --enable-lto \
+      --enable-plugin \
+      --enable-install-libiberty \
+      --with-linker-hash-style=gnu \
+      --enable-gnu-indirect-function \
+      --enable-multilib \
+      --disable-werror \
+      --enable-checking=release \
+      --enable-default-pie \
+      --enable-default-ssp
 
   make
-  
+
   # make documentation
   make -C $CHOST/libstdc++-v3/doc doc-man-doxygen
 }
 
 check() {
-  cd ${srcdir}/gcc-build
-
-  # increase stack size to prevent test failures
-  # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31827
-  ulimit -s 32768
+  cd gcc-build
 
   # do not abort on error as some are "expected"
   make -k check || true
-  ${srcdir}/${_basedir}/contrib/test_summary
+  "$srcdir/gcc/contrib/test_summary"
 }
 
-package_gcc-libs()
-{
-  pkgdesc="Runtime libraries shipped by GCC"
-  groups=('base')
-  depends=('glibc>=2.23')
-  options=('!emptydirs' '!strip')
-  install=gcc-libs.install
-
-  cd ${srcdir}/gcc-build
-  
-  make -C $CHOST/libgcc DESTDIR=${pkgdir} install-shared
-  rm ${pkgdir}/${_libdir}/libgcc_eh.a
-  
+package_gcc-libs() {
+  pkgdesc='Runtime libraries shipped by GCC'
+  groups=(base)
+  depends=('glibc>=2.26')
+  options+=(!strip)
+  provides=($pkgname-multilib)
+  replaces=($pkgname-multilib)
+
+  cd gcc-build
+  make -C $CHOST/libgcc DESTDIR="$pkgdir" install-shared
+  rm -f "$pkgdir/$_libdir/libgcc_eh.a"
+
   for lib in libatomic \
              libcilkrts \
              libgfortran \
@@ -117,209 +140,246 @@ package_gcc-libs()
              libgomp \
              libitm \
              libquadmath \
-             libsanitizer/{a,l,ub}san \
+             libsanitizer/{a,l,ub,t}san \
              libstdc++-v3/src \
              libvtv; do
-    make -C $CHOST/$lib DESTDIR=${pkgdir} install-toolexeclibLTLIBRARIES
+    make -C $CHOST/$lib DESTDIR="$pkgdir" install-toolexeclibLTLIBRARIES
   done
 
-  [[ $CARCH == "x86_64" ]] && \
-    make -C $CHOST/libsanitizer/tsan DESTDIR=${pkgdir} install-toolexeclibLTLIBRARIES
-
-  make -C $CHOST/libobjc DESTDIR=${pkgdir} install-libs
-
-  make -C $CHOST/libstdc++-v3/po DESTDIR=${pkgdir} install
-
-  make -C $CHOST/libmpx DESTDIR=${pkgdir} install
-  rm ${pkgdir}/usr/lib/libmpx.spec
+  make -C $CHOST/libobjc DESTDIR="$pkgdir" install-libs
+  make -C $CHOST/libstdc++-v3/po DESTDIR="$pkgdir" install
+  make -C $CHOST/libmpx DESTDIR="$pkgdir" install
+  rm -f "$pkgdir/usr/lib/libmpx.spec"
 
   for lib in libgomp \
              libitm \
              libquadmath; do
-    make -C $CHOST/$lib DESTDIR=${pkgdir} install-info
+    make -C $CHOST/$lib DESTDIR="$pkgdir" install-info
   done
 
+  # remove files provided by lib32-gcc-libs
+  rm -rf "$pkgdir"/usr/lib32/
+
   # Install Runtime Library Exception
-  install -Dm644 ${srcdir}/${_basedir}/COPYING.RUNTIME \
-    ${pkgdir}/usr/share/licenses/gcc-libs/RUNTIME.LIBRARY.EXCEPTION
+  install -Dm644 "$srcdir/gcc/COPYING.RUNTIME" \
+    "$pkgdir/usr/share/licenses/gcc-libs/RUNTIME.LIBRARY.EXCEPTION"
 }
 
-package_gcc()
-{
+package_gcc() {
   pkgdesc="The GNU Compiler Collection - C and C++ frontends"
-  depends=("gcc-libs=$pkgver-$pkgrel" 'binutils>=2.26' 'libmpc')
+  depends=("gcc-libs=$pkgver-$pkgrel" 'binutils>=2.28' libmpc)
   groups=('base-devel')
-  options=('staticlibs')
-  install=gcc.install
+  optdepends=('lib32-gcc-libs: for generating code for 32-bit ABI')
+  provides=($pkgname-multilib)
+  replaces=($pkgname-multilib)
+  options+=(staticlibs)
 
-  cd ${srcdir}/gcc-build
+  cd gcc-build
 
-  make -C gcc DESTDIR=${pkgdir} install-driver install-cpp install-gcc-ar \
+  make -C gcc DESTDIR="$pkgdir" install-driver install-cpp install-gcc-ar \
     c++.install-common install-headers install-plugin install-lto-wrapper
 
-  install -m755 -t $pkgdir/usr/bin/ gcc/gcov{,-tool}
-  install -m755 -t $pkgdir/${_libdir}/ gcc/{cc1,cc1plus,collect2,lto1}
-
-  make -C $CHOST/libgcc DESTDIR=${pkgdir} install
-  rm ${pkgdir}/usr/lib/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 DESTDIR=${pkgdir} install-libcc1
-  install -d $pkgdir/usr/share/gdb/auto-load/usr/lib
-  mv $pkgdir/usr/lib/libstdc++.so.6.*-gdb.py \
-    $pkgdir/usr/share/gdb/auto-load/usr/lib/
-  rm ${pkgdir}/usr/lib/libstdc++.so*
-
-  make DESTDIR=${pkgdir} install-fixincludes
-  make -C gcc DESTDIR=${pkgdir} install-mkheaders
-  
-  make -C lto-plugin DESTDIR=${pkgdir} install
-  install -dm755 ${pkgdir}/usr/lib/bfd-plugins/
-  ln -s /usr/lib/gcc/$CHOST/${pkgver}/liblto_plugin.so \
-    ${pkgdir}/usr/lib/bfd-plugins/
-
-  make -C $CHOST/libcilkrts DESTDIR=${pkgdir} install-nodist_toolexeclibHEADERS \
-    install-nodist_cilkincludeHEADERS
-  make -C $CHOST/libgomp DESTDIR=${pkgdir} install-nodist_toolexeclibHEADERS \
-    install-nodist_libsubincludeHEADERS
-  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 $CHOST/libmpx DESTDIR=${pkgdir} install-nodist_toolexeclibHEADERS
-
-  make -C libiberty DESTDIR=${pkgdir} install
-  # install PIC version of libiberty
-  install -m644 ${srcdir}/gcc-build/libiberty/pic/libiberty.a ${pkgdir}/usr/lib
-
-  make -C gcc DESTDIR=${pkgdir} install-man install-info
-  rm ${pkgdir}/usr/share/man/man1/{gccgo,gfortran}.1
-  rm ${pkgdir}/usr/share/info/{gccgo,gfortran,gnat-style,gnat_rm,gnat_ugn}.info
-
-  make -C libcpp DESTDIR=${pkgdir} install
-  make -C gcc DESTDIR=${pkgdir} install-po
+  install -m755 -t "$pkgdir/usr/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"/usr/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/usr/share/gdb/auto-load/usr/lib"
+  mv "$pkgdir"/usr/lib/libstdc++.so.6.*-gdb.py \
+    "$pkgdir/usr/share/gdb/auto-load/usr/lib/"
+  rm "$pkgdir"/usr/lib{,32}/libstdc++.so*
+
+  make DESTDIR="$pkgdir" install-fixincludes
+  make -C gcc DESTDIR="$pkgdir" install-mkheaders
+
+  make -C lto-plugin DESTDIR="$pkgdir" install
+  install -dm755 "$pkgdir"/usr/lib/bfd-plugins/
+  ln -s /${_libdir}/liblto_plugin.so \
+    "$pkgdir/usr/lib/bfd-plugins/"
+
+  make -C $CHOST/libcilkrts DESTDIR="$pkgdir" install-nodist_{toolexeclib,cilkinclude}HEADERS
+  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 $CHOST/libmpx DESTDIR="$pkgdir" install-nodist_toolexeclibHEADERS
+  make -C $CHOST/32/libcilkrts DESTDIR="$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 $CHOST/32/libmpx DESTDIR="$pkgdir" install-nodist_toolexeclibHEADERS
+
+  make -C libiberty DESTDIR="$pkgdir" install
+  install -m644 libiberty/pic/libiberty.a "$pkgdir/usr/lib"
+
+  make -C gcc DESTDIR="$pkgdir" install-man install-info
+  rm "$pkgdir"/usr/share/man/man1/{gccgo,gfortran}.1
+  rm "$pkgdir"/usr/share/info/{gccgo,gfortran,gnat-style,gnat_rm,gnat_ugn}.info
+
+  make -C libcpp DESTDIR="$pkgdir" install
+  make -C gcc DESTDIR="$pkgdir" install-po
 
   # many packages expect this symlink
-  ln -s gcc ${pkgdir}/usr/bin/cc
+  ln -s gcc "$pkgdir"/usr/bin/cc
 
   # POSIX conformance launcher scripts for c89 and c99
-  cat > $pkgdir/usr/bin/c89 <<"EOF"
-#!/bin/sh
-fl="-std=c89"
-for opt; do
-  case "$opt" in
-    -ansi|-std=c89|-std=iso9899:1990) fl="";;
-    -std=*) echo "`basename $0` called with non ANSI/ISO C option $opt" >&2
-	    exit 1;;
-  esac
-done
-exec gcc $fl ${1+"$@"}
-EOF
-
-  cat > $pkgdir/usr/bin/c99 <<"EOF"
-#!/bin/sh
-fl="-std=c99"
-for opt; do
-  case "$opt" in
-    -std=c99|-std=iso9899:1999) fl="";;
-    -std=*) echo "`basename $0` called with non ISO C99 option $opt" >&2
-	    exit 1;;
-  esac
-done
-exec gcc $fl ${1+"$@"}
-EOF
-
-  chmod 755 $pkgdir/usr/bin/c{8,9}9
+  install -Dm755 "$srcdir/c89" "$pkgdir/usr/bin/c89"
+  install -Dm755 "$srcdir/c99" "$pkgdir/usr/bin/c99"
 
   # install the libstdc++ man pages
-  make -C $CHOST/libstdc++-v3/doc DESTDIR=$pkgdir doc-install-man
+  make -C $CHOST/libstdc++-v3/doc DESTDIR="$pkgdir" doc-install-man
+
+  # remove files provided by lib32-gcc-libs
+  rm -f "$pkgdir"/usr/lib32/lib{stdc++,gcc_s}.so
 
   # Install Runtime Library Exception
-  install -d ${pkgdir}/usr/share/licenses/gcc/
-  ln -s ../gcc-libs/RUNTIME.LIBRARY.EXCEPTION ${pkgdir}/usr/share/licenses/gcc/
+  install -d "$pkgdir/usr/share/licenses/$pkgname/"
+  ln -s /usr/share/licenses/gcc-libs/RUNTIME.LIBRARY.EXCEPTION \
+    "$pkgdir/usr/share/licenses/$pkgname/"
 }
 
-package_gcc-fortran()
-{
-  pkgdesc="Fortran front-end for GCC"
+package_gcc-fortran() {
+  pkgdesc='Fortran front-end for GCC'
   depends=("gcc=$pkgver-$pkgrel")
-  options=('!emptydirs')
-  install=gcc-fortran.install
+  provides=($pkgname-multilib)
+  replaces=($pkgname-multilib)
 
-  cd ${srcdir}/gcc-build
-  make -C $CHOST/libgfortran DESTDIR=$pkgdir install-{caf,my}execlibLTLIBRARIES \
+  cd gcc-build
+  make -C $CHOST/libgfortran DESTDIR="$pkgdir" install-cafexeclibLTLIBRARIES \
     install-{toolexeclibDATA,nodist_fincludeHEADERS}
-  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
+  make -C $CHOST/32/libgfortran DESTDIR=$pkgdir install-cafexeclibLTLIBRARIES \
+    install-{toolexeclibDATA,nodist_fincludeHEADERS}
+  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"
 
-  ln -s gfortran ${pkgdir}/usr/bin/f95
+  ln -s gfortran "$pkgdir/usr/bin/f95"
 
   # Install Runtime Library Exception
-  install -d ${pkgdir}/usr/share/licenses/gcc-fortran/
-  ln -s ../gcc-libs/RUNTIME.LIBRARY.EXCEPTION ${pkgdir}/usr/share/licenses/gcc-fortran/
+  install -d "$pkgdir/usr/share/licenses/$pkgname/"
+  ln -s /usr/share/licenses/gcc-libs/RUNTIME.LIBRARY.EXCEPTION \
+    "$pkgdir/usr/share/licenses/$pkgname/"
 }
 
-package_gcc-objc()
-{
-  pkgdesc="Objective-C front-end for GCC"
+package_gcc-objc() {
+  pkgdesc='Objective-C front-end for GCC'
   depends=("gcc=$pkgver-$pkgrel")
+  provides=($pkgname-multilib)
+  replaces=($pkgname-multilib)
 
-  cd ${srcdir}/gcc-build
-  make DESTDIR=$pkgdir -C $CHOST/libobjc install-headers
-  install -dm755 $pkgdir/${_libdir}
-  install -m755 gcc/cc1obj{,plus} $pkgdir/${_libdir}/
+  cd gcc-build
+  make DESTDIR="$pkgdir" -C $CHOST/libobjc install-headers
+  install -dm755 "$pkgdir/${_libdir}"
+  install -m755 gcc/cc1obj{,plus} "$pkgdir/${_libdir}/"
 
   # Install Runtime Library Exception
-  install -d ${pkgdir}/usr/share/licenses/gcc-objc/
-  ln -s ../gcc-libs/RUNTIME.LIBRARY.EXCEPTION ${pkgdir}/usr/share/licenses/gcc-objc/
+  install -d "$pkgdir/usr/share/licenses/$pkgname/"
+  ln -s /usr/share/licenses/gcc-libs/RUNTIME.LIBRARY.EXCEPTION \
+    "$pkgdir/usr/share/licenses/$pkgname/"
 }
 
-package_gcc-ada()
-{
-  pkgdesc="Ada front-end for GCC (GNAT)"
+package_gcc-ada() {
+  pkgdesc='Ada front-end for GCC (GNAT)'
   depends=("gcc=$pkgver-$pkgrel")
-  options=('staticlibs' '!emptydirs')
-  install=gcc-ada.install
+  provides=($pkgname-multilib)
+  replaces=($pkgname-multilib)
+  options+=(staticlibs)
+
+  cd gcc-build/gcc
+  make DESTDIR="$pkgdir" ada.install-{common,info}
+  install -m755 gnat1 "$pkgdir/${_libdir}"
 
-  cd ${srcdir}/gcc-build/gcc
-  make DESTDIR=$pkgdir ada.install-{common,info}
-  install -m755 gnat1 $pkgdir/${_libdir}
+  cd "$srcdir"/gcc-build/$CHOST/32/libada
+  make DESTDIR=${pkgdir} INSTALL="install" \
+    INSTALL_DATA="install -m644" install-gnatlib
 
-  ln -s gcc ${pkgdir}/usr/bin/gnatgcc
+  ln -s gcc "$pkgdir/usr/bin/gnatgcc"
 
   # insist on dynamic linking, but keep static libraries because gnatmake complains
-  mv ${pkgdir}/${_libdir}/adalib/libgna{rl,t}-${_pkgver}.so ${pkgdir}/usr/lib
-  ln -s libgnarl-${_pkgver}.so ${pkgdir}/usr/lib/libgnarl.so
-  ln -s libgnat-${_pkgver}.so ${pkgdir}/usr/lib/libgnat.so
-  rm ${pkgdir}/${_libdir}/adalib/libgna{rl,t}.so
+  mv "$pkgdir"/${_libdir}/adalib/libgna{rl,t}-${_majorver}.so "$pkgdir/usr/lib"
+  ln -s libgnarl-${_majorver}.so "$pkgdir/usr/lib/libgnarl.so"
+  ln -s libgnat-${_majorver}.so "$pkgdir/usr/lib/libgnat.so"
+  rm -f "$pkgdir"/${_libdir}/adalib/libgna{rl,t}.so
+
+  install -d "$pkgdir/usr/lib32/"
+  mv "$pkgdir"/${_libdir}/32/adalib/libgna{rl,t}-${_majorver}.so "$pkgdir/usr/lib32"
+  ln -s libgnarl-${_majorver}.so "$pkgdir/usr/lib32/libgnarl.so"
+  ln -s libgnat-${_majorver}.so "$pkgdir/usr/lib32/libgnat.so"
+  rm -f "$pkgdir"/${_libdir}/32/adalib/libgna{rl,t}.so
 
   # Install Runtime Library Exception
-  install -d ${pkgdir}/usr/share/licenses/gcc-ada/
-  ln -s ../gcc-libs/RUNTIME.LIBRARY.EXCEPTION ${pkgdir}/usr/share/licenses/gcc-ada/
+  install -d "$pkgdir/usr/share/licenses/$pkgname/"
+  ln -s /usr/share/licenses/gcc-libs/RUNTIME.LIBRARY.EXCEPTION \
+    "$pkgdir/usr/share/licenses/$pkgname/"
 }
 
-package_gcc-go()
-{
-  pkgdesc="Go front-end for GCC"
+package_gcc-go() {
+  pkgdesc='Go front-end for GCC'
   depends=("gcc=$pkgver-$pkgrel")
-  conflicts=('go')
-  options=('!emptydirs')
-  install=gcc-go.install
+  provides=("go=1.8.1" $pkgname-multilib)
+  replaces=($pkgname-multilib)
+  conflicts=(go)
+
+  cd gcc-build
+  make -C $CHOST/libgo DESTDIR="$pkgdir" install-exec-am
+  make -C $CHOST/32/libgo DESTDIR="$pkgdir" install-exec-am
+  make DESTDIR="$pkgdir" install-gotools
+  make -C gcc DESTDIR="$pkgdir" go.install-{common,man,info}
+
+  rm -f "$pkgdir"/usr/lib{,32}/libgo.so*
+  install -Dm755 gcc/go1 "$pkgdir/${_libdir}/go1"
+
+  # Install Runtime Library Exception
+  install -d "$pkgdir/usr/share/licenses/$pkgname/"
+  ln -s /usr/share/licenses/gcc-libs/RUNTIME.LIBRARY.EXCEPTION \
+    "$pkgdir/usr/share/licenses/$pkgname/"
+}
+
+package_lib32-gcc-libs() {
+  pkgdesc='32-bit runtime libraries shipped by GCC'
+  depends=('lib32-glibc>=2.26')
+  groups=(multilib-devel)
+  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 \
+             libcilkrts \
+             libgfortran \
+             libgo \
+             libgomp \
+             libitm \
+             libquadmath \
+             libsanitizer/{a,l,ub}san \
+             libstdc++-v3/src \
+             libvtv; do
+    make -C $CHOST/32/$lib DESTDIR="$pkgdir" install-toolexeclibLTLIBRARIES
+  done
 
-  cd ${srcdir}/gcc-build
-  make -C $CHOST/libgo DESTDIR=$pkgdir install-exec-am
-  rm ${pkgdir}/usr/lib/libgo.so*
-  make -C gcc DESTDIR=$pkgdir go.install-{common,man,info}
-  install -Dm755 gcc/go1 $pkgdir/${_libdir}/go1
+  make -C $CHOST/32/libobjc DESTDIR="$pkgdir" install-libs
+  make -C $CHOST/32/libmpx DESTDIR="$pkgdir" install
+  rm -f "$pkgdir/usr/lib32/libmpx.spec"
 
-  make DESTDIR=${pkgdir} install-gotools
+  # remove files provided by gcc-libs
+  rm -rf "$pkgdir"/usr/lib
 
   # Install Runtime Library Exception
-  install -d ${pkgdir}/usr/share/licenses/gcc-go/
-  ln -s ../gcc-libs/RUNTIME.LIBRARY.EXCEPTION ${pkgdir}/usr/share/licenses/gcc-go/
+  install -Dm644 "$srcdir/gcc/COPYING.RUNTIME" \
+    "$pkgdir/usr/share/licenses/lib32-gcc-libs/RUNTIME.LIBRARY.EXCEPTION"
 }