#!/bin/bash
# Copyright 2003, 2004  Slackware Linux, Inc., Concord, California, USA
# Copyright 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2021, 2022, 2023, 2024  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.
#

# Modified 2011 by Eric Hameleers <alien at slackware.com> for OpenJDK.

# Modified to build libgccjit based on ideas from Didier Spaier's SlackBuild.

# We REQUIRE_GLOBAL_LOCK on this package to avoid colliding with a gcc build
# if make_world.sh is running in parallel.

cd $(dirname $0) ; CWD=$(pwd)

PKGNAM=libgccjit
SRCNAM=gcc
SRCVER=${VERSION:-$(echo $SRCNAM-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
VERSION=$(echo $SRCVER | cut -f 1 -d _)
BUILD=${BUILD:-1}

# How many jobs to run in parallel:
NUMJOBS=${NUMJOBS:-" -j$(expr $(nproc) + 1) "}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$(uname -m)" in
    i?86) ARCH=i586 ;;
    arm*) readelf /usr/bin/file -A | grep -E -q "Tag_CPU.*[4,5]" && ARCH=arm || ARCH=armv7hl ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
    *) ARCH=$(uname -m) ;;
  esac
  export ARCH
fi

# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
# the name of the created package would be, and then exit. This information
# could be useful to other scripts.
if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PKGNAM-$VERSION-$ARCH-$BUILD.txz"
  exit 0
fi

if [ "$ARCH" = "i386" ]; then
  SLKCFLAGS="-O2 -march=i386 -mcpu=i686"
  LIBDIRSUFFIX=""
  LIB_ARCH=i386
elif [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
  LIBDIRSUFFIX=""
  LIB_ARCH=i386
elif [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
  LIB_ARCH=i386
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686"
  LIBDIRSUFFIX=""
  LIB_ARCH=i386
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
  LIB_ARCH=s390
elif [ "$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

# Temporary build location:
TMP=${TMP:-/tmp}

# Extract the source code:
cd $TMP
rm -rf $SRCNAM-$SRCVER
echo "Extracting $CWD/$SRCNAM-$SRCVER.tar.?z..."
tar xf $CWD/$SRCNAM-$SRCVER.tar.?z || exit 1

# This is the DESTDIR target:
PKG=$TMP/package-$PKGNAM

# Clear the build locations:
rm -rf $PKG
mkdir -p $PKG

cd gcc-$SRCVER || exit 1

# Apply any required patches:
for patch in $CWD/patches/*.patch $CWD/patches/*.diff ; do
  if [ -r "$patch" ]; then
    cat $patch | patch -p1 --verbose --backup --suffix=.orig || exit 1
  fi
done
for patch in $CWD/patches/*.patch.gz $CWD/patches/*.diff.gz ; do
  if [ -r "$patch" ]; then
    zcat $patch | patch -p1 --verbose --backup --suffix=.orig || exit 1
  fi
done

# Fix perms/owners:
chown -R root:root .
find . \
  \( -perm 777 -o -perm 775 -o -perm 754 \) \
  -exec chmod 755 {} \+ -o \
  \( -perm 664 \) \
  -exec chmod 644 {} \+

# Install docs:
DOCSDIR=$PKG/usr/doc/$PKGNAM-$VERSION
mkdir -p $DOCSDIR
cp -a \
  COPYING.RUNTIME gcc/jit/TODO* gcc/jit/notes* \
$DOCSDIR
if [ -r gcc/jit/ChangeLog ]; then
  cat gcc/jit/ChangeLog | head -n 1000 > $DOCSDIR/ChangeLog
  touch -r gcc/jit/ChangeLog $DOCSDIR/ChangeLog
fi

# build gcc
( mkdir gcc.build.lnx
  cd gcc.build.lnx

  if [ "$ARCH" != "x86_64" ]; then
    GCC_ARCHOPTS="--with-arch=$ARCH"
  else
    GCC_ARCHOPTS="--disable-multilib"
  fi

  CFLAGS="$SLKCFLAGS" \
  CXXFLAGS="$SLKCFLAGS" \
  ../configure --prefix=/usr \
     --libdir=/usr/lib$LIBDIRSUFFIX \
     --mandir=/usr/man \
     --infodir=/usr/info \
     --enable-shared \
     --enable-host-shared \
     --enable-bootstrap \
     --enable-languages=jit \
     --enable-threads=posix \
     --enable-checking=release \
     --enable-objc-gc \
     --with-system-zlib \
     --enable-libstdcxx-dual-abi \
     --with-default-libstdcxx-abi=new \
     --disable-libstdcxx-pch \
     --disable-libunwind-exceptions \
     --enable-__cxa_atexit \
     --disable-libssp \
     --enable-gnu-unique-object \
     --enable-plugin \
     --enable-lto \
     --disable-install-libiberty \
     --disable-werror \
     --with-gnu-ld \
     --with-isl \
     --verbose \
     --with-arch-directory=$LIB_ARCH \
     --disable-gtktest \
     --enable-clocale=gnu \
     $GCC_ARCHOPTS \
     --target=${TARGET} \
     --build=${TARGET} \
     --host=${TARGET} || exit 1

  make $NUMJOBS bootstrap || exit 1
  make -C gcc DESTDIR=$PKG jit.install-common jit.install-info || exit 1
) || exit 1

# Don't ship .la files in /{,usr/}lib${LIBDIRSUFFIX}:
rm -f $PKG/{,usr/}lib${LIBDIRSUFFIX}/*.la

# Strip binaries:
find $PKG | xargs file | grep -e "executable" -e "shared object" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null

# Get rid of empty directories (harmless, but might as well clean up):
( cd $PKG/usr
  rmdir -p bin lib*/gcc/*/* man/man*
)

# Compress info files, if any:
if [ -d $PKG/usr/info ]; then
  ( cd $PKG/usr/info
    rm -f dir
    gzip -9 *
  )
fi

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

cd $PKG
/sbin/makepkg -l y -c n $TMP/$PKGNAM-$VERSION-$ARCH-$BUILD.txz