#!/bin/sh
# GCC package build script (written by volkerdi@slackware.com)
# Updated by Eric Hameleers,
# to only build a static gcc used to bootstrap a multilib compiler suite.
#
# Copyright 2003, 2004  Slackware Linux, Inc., Concord, California, USA
# Copyright 2005, 2006, 2007, 2008, 2009  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.
#

VERSION=7.3.0
ARCH=${ARCH:-x86_64}
TARGET=$ARCH-slackware-linux
BUILD=${BUILD:-1alien}

# How many jobs to run in parallel:
NUMJOBS=" -j7 "

if [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
fi

CWD=$(pwd)
# Temporary build location.  This should *NOT* be a directory
# path a non-root user could create later...
TMP=/gcc-$(mcookie)

# This is the main DESTDIR target:
PKG1=$TMP/package-gcc

# Clear the build locations:
if [ -d $TMP ]; then
  rm -rf $TMP
fi
mkdir -p $PKG1/usr/doc/gcc-$VERSION

# Insert package descriptions:
mkdir -p $PKG1/install
cat $CWD/slack-desc.gcc > $PKG1/install/slack-desc

cd $TMP
tar xvf $CWD/gcc-$VERSION.tar.?z*

# install docs
( cd gcc-$VERSION
  # Smite the fixincludes:
  zcat $CWD/gcc-no_fixincludes.diff.gz | patch -p1 --verbose --backup --suffix=.orig || exit 1
  # Fix perms/owners
  chown -R root:root .
  find . -perm 777 -exec chmod 755 {} \;
  find . -perm 775 -exec chmod 755 {} \;
  find . -perm 754 -exec chmod 755 {} \;
  find . -perm 664 -exec chmod 644 {} \;
  mkdir -p $PKG1/usr/doc/gcc-$VERSION
  # Only the most recent ChangeLog... shouldn't be too big. :)
  cp -a \
    BUGS COPYING* ChangeLog \
    ChangeLog.tree-ssa FAQ INSTALL \
    LAST_UPDATED MAINTAINERS NEWS \
    README* *.html \
  $PKG1/usr/doc/gcc-$VERSION

  mkdir -p $PKG1/usr/doc/gcc-${VERSION}/gcc
  ( cd gcc
    cp -a \
      ABOUT* COPYING* LANG* ONEWS README* SERVICE \
    $PKG1/usr/doc/gcc-$VERSION/gcc

  # Add the SlackBuild:
  cat $0 > $PKG1/usr/doc/gcc-$VERSION/gcc-static.SlackBuild
  chmod 644 $PKG1/usr/doc/gcc-$VERSION/gcc-static.SlackBuild

  ) || exit 1

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

  if [ "$ARCH" != "x86_64" ]; then
    GCC_ARCHOPTS="--with-arch=$ARCH"
  else
    GCC_ARCHOPTS="--enable-multilib"
  fi
 
  # These should not be set:
  unset CFLAGS
  unset CXXFLAGS

  # So that the build does not drag in the non-multilib host headers:
  mkdir -p $TMP/include
  touch $TMP/include/limits.h

  ../gcc-$VERSION/configure \
     --with-local-prefix=$TMP \
     --prefix=/usr \
     --libdir=/usr/lib$LIBDIRSUFFIX \
     --without-headers \
     --with-newlib \
     --disable-shared \
     --disable-nls \
     --disable-decimal-float \
     --disable-install-libiberty \
     --disable-libgomp \
     --disable-libmudflap \
     --disable-libssp \
     --disable-threads \
     --enable-languages=c \
     --verbose \
     $GCC_ARCHOPTS \
     --target=${TARGET} \
     --build=${TARGET} \
     --host=${TARGET} || exit 1

  # Start the build:

  make all-gcc all-target-libgcc

  # Set GCCCHECK=something to run the tests
  if [ ! -z $GCCCHECK ]; then
    make $NUMJOBS check
  fi

  make install-gcc install-target-libgcc DESTDIR=$PKG1

# Be sure the "specs" file is installed.
if [ ! -r $PKG1/usr/lib${LIBDIRSUFFIX}/gcc/${ARCH}-slackware-linux/${VERSION}/specs ]; then
  cat gcc/specs > $PKG1/usr/lib${LIBDIRSUFFIX}/gcc/${ARCH}-slackware-linux/${VERSION}/specs
fi

  # This is provided by binutils, so delete it here:
  rm -f $PKG1/usr/lib${LIBDIRSUFFIX}/libiberty.a
  rm -f $PKG1/usr/lib/libiberty.a # catch-all

  # Fix stuff up:
  ( cd $PKG1/usr/info ; rm dir ; gzip -9 * )
  ( cd $PKG1
    # *not* ${LIBDIRSUFFIX}
    mkdir -p lib
    cd lib
    ln -sf /usr/bin/cpp .
  )
  ( cd $PKG1/usr/bin
    mv gcc gcc-$VERSION
    ln -sf gcc-$VERSION gcc
    ln -sf gcc cc
    ln -sf gcc-$VERSION ${TARGET}-gcc
    ln -sf gcc-$VERSION ${TARGET}-gcc-$VERSION
  )
  ( cd $PKG1/usr/man
    gzip -9 */*
    cd man1
    ln -sf g++.1.gz c++.1.gz
    ln -sf gcc.1.gz cc.1.gz
  )  

# keep a log
) 2>&1 | tee $TMP/gcc.build.log

# Filter all .la files (thanks much to Mark Post for the sed script):
( cd $PKG1
  for file in $(find . -type f -name "*.la") ; do
    cat $file | sed -e 's%-L'${TMP}'[[:graph:]]* % %g' > $TMP/tmp-la-file
    cat $TMP/tmp-la-file > $file
  done
  rm $TMP/tmp-la-file
)

## Strip bloated binaries and libraries:
for dir in $PKG1; do
  ( cd $dir
    find . -name "lib*so*" -exec strip --strip-unneeded "{}" \;
    find . -name "lib*a" -exec strip -g "{}" \;
    strip --strip-unneeded usr/bin/* 2> /dev/null
    find . | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
    find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
  )
done

( cd $PKG1
  /sbin/makepkg -l y -c n $TMP/gcc-${VERSION}_static-$ARCH-$BUILD.txz )

echo
echo "Slackware GCC "static" package build complete!"
echo