#!/bin/sh
# Heavily based on the Slackware 13.37 SlackBuild
# http://www.llvm.org/
# Packager Andrea Sciucca ( gohanz at infinito.it)
# http://www.slacky.eu
#
# 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.
#
# Required: ocaml (Only compilation)
#
# Exit on most errors
set -e


# Set variables:
CWD=`pwd`
OUTPUT=${OUTPUT:-$CWD}
PKGNAME=llvm
TMP=${TMP:-/tmp/txz/$PKGNAME}
PKG=$TMP/package
VERSION=${VERSION:-2.9}
ARCH=${ARCH:-i586}
JOBS=${JOBS:--j4}
BUILD=${BUILD:-1}
TAG=${TAG:-vl70}

# Download sorce tarball if still not present
SOURCE="http://www.llvm.org/releases/$VERSION/$PKGNAME-$VERSION.tgz"

if [ ! -e $CWD/$PKGNAME-$VERSION.tgz ]; then
 wget $SOURCE
fi


# Set compiling FLAGS
if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"; SLKLDFLAGS=""; LIBDIRSUFFIX=""; CHOST="i486"
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"; SLKLDFLAGS=""; LIBDIRSUFFIX=""; CHOST="i686"
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"; SLKLDFLAGS="-L/usr/lib64"; LIBDIRSUFFIX="64"; CHOST="x86_64"
fi

# Create building directory
rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT


# Decompress the source tarball
cd $TMP
tar xvzf $CWD/$PKGNAME-$VERSION.tgz

echo -e "\E[0;32m+-----------------------+\E[0;0m"
echo -e "\E[0;32m| Start SlackBuild LLVM |\E[0;0m"
echo -e "\E[0;32m+-----------------------+\E[0;0m"

# Adjust permissions and ownerships
cd $PKGNAME-$VERSION
chown -R root:root .
chmod -R u+w,go+r-w,a-s .

# Building LLVM package
LDFLAGS="$SLKLDFLAGS" \
CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure 	--prefix=/usr \
		--sysconfdir=/etc \
		--localstatedir=/var \
		--libdir=/usr/lib${LIBDIRSUFFIX} \
		--mandir=/usr/man \
		--enable-libffi \
		--enable-optimized \
		--disable-assertions \
		--enable-pic \
		--enable-shared \
		--program-prefix= \
		--program-suffix= \
		--build=$CHOST-slackware-linux
# Correct libdir setting
sed -i "s|\$(PROJ_prefix)/lib|\$(PROJ_prefix)/lib$LIBDIRSUFFIX|" Makefile.config
make $JOBS
make install DESTDIR=$PKG

# Remove example libraries
rm -f $PKG/usr/lib$LIBDIRSUFFIX/LLVMHello*

# Fix wrong libdir
sed -i -e "s|ABS_RUN_DIR/lib\"|ABS_RUN_DIR/lib$LIBDIRSUFFIX\"|" \
    $PKG/usr/bin/llvm-config

# Strip binaries and shared objects, if present
( cd $PKG
  find . | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs -r strip --strip-unneeded 2> /dev/null || true
  find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs -r strip --strip-unneeded 2> /dev/null || true
  find . | xargs file | grep "current ar archive" | cut -f 1 -d : | xargs -r strip --strip-unneeded 2> /dev/null || true
)


#Add documentation files: readme, changelog and so on
mkdir -p $PKG/usr/doc/$PKGNAME-$VERSION/SlackBuild
cp -a README.txt *.TXT $PKG/usr/doc/$PKGNAME-$VERSION
chmod 644 $PKG/usr/doc/$PKGNAME-$VERSION/*


# Also add the slack-desk file and this slackbuild to the package
mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
cat $CWD/slack-desc > $PKG/usr/doc/$PKGNAME-$VERSION/SlackBuild/slack-desc
cat $CWD/$PKGNAME.SlackBuild > $PKG/usr/doc/$PKGNAME-$VERSION/SlackBuild/$PKGNAME.SlackBuild


# Move all docs on standard directory 
#mv $PKG/usr/docs/llvm/* $PKG/usr/doc/$PKGNAME-$VERSION
rm -r $PKG/usr/docs


# Move all manpage on standard directory 
mv $PKG/usr/share/* $PKG/usr/
rm -r $PKG/usr/share


# Compress the man pages if present
if [ -d $PKG/usr/man ]; then
    ( cd $PKG/usr/man
      find . -type f -exec gzip -9 {} \;
      for i in $( find . -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
    )
fi



# Find and print dependencies into slack-required file
cd $PKG
chown -R root:root $PKG
if [ -x /usr/bin/requiredbuilder ];then
requiredbuilder -y -v -s  $CWD $PKG
fi
# Create txz package
/sbin/makepkg -l y -c n $OUTPUT/$PKGNAME-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-txz}


# Cleanup if enabled
if [ "$1" = "--cleanup" ]; then
 rm -rf $TMP
fi