#!/bin/sh

# Slackware build script for gcc-d

# Copyright 2017-2018 Eugene Wissner, Dachau, Germany
#
# Based on the GCC build script by Patrick J. Volkerding, Sebeka, MN, USA
#
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

PRGNAM=gcc-d
VERSION=${VERSION:-2.081.2}
GCC_VERSION=8.2.0
HOST_GDC=2.076.0
HOST_GCC=7.3.0
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}

if [ -z "$ARCH" ]; then
  case "$(uname -m)" in
    i?86) ARCH=i586 ;;
    arm*) readelf /usr/bin/file -A | egrep -q "Tag_CPU.*[4,5]" && ARCH=arm || ARCH=armv7hl ;;
    *) ARCH=$(uname -m) ;;
  esac
  export ARCH
fi

CWD=$(pwd)
TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
  LIB_ARCH=i386
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
  LIB_ARCH=i386
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
  LIB_ARCH=amd64
elif [ "$ARCH" = "armv7hl" ]; then
  SLKCFLAGS="-O3 -march=armv7-a -mfpu=vfpv3-d16"
  LIBDIRSUFFIX=""
  LIB_ARCH=armv7hl
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
  LIB_ARCH=$ARCH
fi

case "$ARCH" in
  arm*) TARGET=$ARCH-slackware-linux-gnueabi ;;
  *)    TARGET=$ARCH-slackware-linux ;;
esac

if [ "$ARCH" != "x86_64" ]; then
  GCC_ARCHOPTS="--with-arch=$ARCH"
else
  GCC_ARCHOPTS="--disable-multilib"
fi
MAJOR=$( echo $GCC_VERSION | cut -d. -f1 )

set -e
rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT

# Build bootstrap compiler
cd $TMP
rm -rf gdc-$HOST_GDC gcc-$HOST_GCC $TMP/bootstrap-gcc-d
tar xvf $CWD/gcc-$HOST_GCC.tar.?z*
tar xvf $CWD/gdc-$HOST_GDC.tar.?z*

# Apply patches.
cd $TMP/gcc-$HOST_GCC/gcc

cd $TMP/gdc-$HOST_GDC
sh setup-gcc.sh ../gcc-$HOST_GCC

cd $TMP/gcc-$HOST_GCC

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
../gcc-$HOST_GCC/configure \
  --prefix=$TMP/bootstrap-$PRGNAM \
  --enable-shared \
  --disable-bootstrap \
  --enable-languages=c,c++,d \
  --enable-threads=posix \
  --enable-checking=release \
  --with-system-zlib \
  --enable-libstdcxx-dual-abi \
  --disable-libunwind-exceptions \
  --enable-__cxa_atexit \
  --enable-libssp \
  --enable-lto \
  --disable-install-libiberty \
  --with-gnu-ld \
  --verbose \
  --with-arch-directory=$LIB_ARCH \
  $GCC_ARCHOPTS \
  --target=${TARGET} \
  --build=${TARGET} \
  --host=${TARGET}

make
make install

# Build D compiler
cd $TMP
rm -rf gdc-$VERSION gcc-$GCC_VERSION
tar xvf $CWD/gcc-$GCC_VERSION.tar.?z*
tar xvf $CWD/gdc-$VERSION.tar.?z*

# Apply patches.
cd $TMP/gcc-$GCC_VERSION/gcc

cd $TMP/gdc-$VERSION
sh setup-gcc.sh ../gcc-$GCC_VERSION

cd $TMP/gcc-$GCC_VERSION
chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 -o -perm 511 \) \
 -exec chmod 755 {} \; -o \
 \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
 -exec chmod 644 {} \;

CC="$TMP/bootstrap-$PRGNAM/bin/gcc" \
CXX="$TMP/bootstrap-$PRGNAM/bin/g++" \
CPP="$TMP/bootstrap-$PRGNAM/bin/cpp" \
GDC="$TMP/bootstrap-$PRGNAM/bin/gdc" \
CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
../gcc-$GCC_VERSION/configure \
  --prefix=/opt/gdc \
  --libdir=/opt/gdc/lib$LIBDIRSUFFIX \
  --mandir=/usr/man \
  --infodir=/usr/info \
  --enable-shared \
  --enable-bootstrap \
  --enable-languages=c,c++,d \
  --enable-threads=posix \
  --enable-checking=release \
  --with-system-zlib \
  --enable-libstdcxx-dual-abi \
  --disable-libunwind-exceptions \
  --enable-__cxa_atexit \
  --enable-libssp \
  --enable-lto \
  --disable-install-libiberty \
  --with-gnu-ld \
  --verbose \
  --with-arch-directory=$LIB_ARCH \
  --program-suffix="-$MAJOR" \
  --with-pkgversion="GDC $VERSION" \
  $GCC_ARCHOPTS \
  --target=${TARGET} \
  --build=${TARGET} \
  --host=${TARGET}

make
make install DESTDIR=$PKG

# Remove not D related stuff, already available in GCC
find $PKG/usr/info -type f -not -name "*gdc*" -delete
rm -r $PKG/usr/man/man7
#rm -r $PKG/usr/share
#rm -r $PKG/usr/include

#find $PKG/usr/libexec/gcc \
#  \( -type f -or -type l \) -not -name "cc1d" \
#  -delete

#find $PKG/usr/lib$LIBDIRSUFFIX/gcc -mindepth 3 \
#  \( -type f -or -type l \) -not -regex ".*/d/.*" \
#  -delete

#find $PKG/usr/lib$LIBDIRSUFFIX -maxdepth 1 \
#  \( -type f -or -type l \)  \
#  -not \( -name "*phobos*" -or -name "*gdruntime*" \) \
#  -delete

#find $PKG/usr -type d -empty -delete

find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

mkdir -p $PKG/usr/bin
for bin in $PKG/opt/gdc/bin/g* $PKG/opt/gdc/bin/c*; do
  binary=$( basename $bin )
  ln -s /opt/gdc/bin/$binary $PKG/usr/bin/$binary
done
ln -s gdc-$MAJOR $PKG/usr/bin/gdc

find $PKG/usr/man -type f -exec gzip -9 {} \;
for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done

gzip -9 $PKG/usr/info/*.info

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp $TMP/gdc-$VERSION/README.md $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
cat $CWD/doinst.sh > $PKG/install/doinst.sh

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}
