#!/bin/sh

# Slackware build script for ghc

# Written by Mikko Värri (vmj@linuxbox.fi)
# Public domain.

PRGNAM=ghc
VERSION=${VERSION:-7.0.1}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i486 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

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

if [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
  LIBDIRSUFFIX=""
  TARARCH=i386
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
  TARARCH=i386
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
  TARARCH="x86_64"
else
  printf "$ARCH is not supported...\n"
  exit 1
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION-$TARARCH-unknown-linux.tar.bz2
cd $PRGNAM-$VERSION
chown -R root:root .
find . \
 \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
 -exec chmod 755 {} \; -o \
 \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
 -exec chmod 644 {} \;

if [ "$TARARCH" = "i386" ] ; then
    # In i386 binary distribution, the prebuilt binaries used to install GHC
    # are linked against libffi.so.5, but slackware ships with libffi.so.4
    # (in d/gcc-java).
    # Luckily, GHC includes its own copy of libffi.  It's only under different
    # name (to avoid conflicts with system libffi).
    # For the duration of the "configure && make install", let's copy the
    # bundled libffi to expected name.
    cp libffi/dist-install/build/libHSffi-ghc${VERSION}.so libffi/libffi.so.5
    if [ "x$LD_LIBRARY_PATH" = "x" ] ; then
        LD_LIBRARY_PATH=$TMP/$PRGNAM-$VERSION/libffi/
    else
        LD_LIBRARY_PATH=$TMP/$PRGNAM-$VERSION/libffi/:$LD_LIBRARY_PATH
    fi
    export LD_LIBRARY_PATH
fi

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --mandir=/usr/man \
  --docdir=/usr/doc/$PRGNAM-$VERSION \
  --libdir=/usr/lib${LIBDIRSUFFIX}

make install DESTDIR=$PKG

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

find $PKG/usr/man -type f -exec gzip -9 {} \;

cp -a INSTALL LICENSE README $PKG/usr/doc/$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

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