#!/bin/bash

# llvm.SlackBuild
# Heavily based on the original Slackware build scripts,
# Modified by Stuart Winter for Slackware ARM.
#
# Copyright 2008-2011 Heinz Wiesinger, Amsterdam, The Netherlands
# Copyright 2012  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.

# Record toolchain & other info for the build log:
slackbuildinfo

# Paths to skeleton port's source & real Slackware source tree:
export CWD=$SLACKSOURCE/$PKGSERIES/$PKGNAM
export PORTCWD=$PWD

# Temporary build locations:
export TMPBUILD=$TMP/build-$PKGNAM
export PKG=$TMP/package-$PKGNAM
mkpkgdirs # Delete & re-create temporary directories then cd into $TMPBUILD

# Determine the CFLAGS for the known architectures:
case $ARCH in
   arm)     export SLKCFLAGS="-O2 -march=armv5te"
            export LIBDIRSUFFIX="" ;;
   *)       export SLKCFLAGS="-O2" ;;
esac

# Extract source:
tar xvvf $CWD/$PKGNAM-$VERSION.tar.xz

CLANG=${CLANG:-yes}
if [ "$CLANG" = "no" ]; then
  cd $PKGNAM-${VERSION}.src || exit 1
else
  cd $PKGNAM-${VERSION}.src/tools || exit 1
  rm -rf clang clang-${VERSION}.src
  tar xvvf $CWD/clang-$VERSION.tar.xz
  mv clang-${VERSION}.src clang
  cd ../

  # clang fixes for slackware
  # No longer needed as of llvm/clang 3.0?
  #patch -p1 -d tools/clang -i $CWD/clang-slackware.diff
fi
slackhousekeeping

CINC="/usr/include/"
GCCDIR=/usr/lib$LIBDIRSUFFIX/gcc/$ARCH-slackware-linux*/*/
CINC="$CINC:$(echo ${GCCDIR})/include/"
CINC="$CINC:$(echo ${GCCDIR})/include-fixed/"

# Disable RPATH usage:
zcat $CWD/llvm.rpath.fix.diff.gz | patch -p1 --verbose || exit 1

# Configure:
CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
   --prefix=/usr \
   --libdir=/usr/lib$LIBDIRSUFFIX \
   --sysconfdir=/etc \
   --localstatedir=/var \
   --mandir=/usr/man \
   --enable-optimized \
   --disable-assertions \
   --enable-pic \
   --with-c-include-dirs=$CINC \
   --build=$ARCH-slackware-linux-gnueabi || failconfig

# Correct libdir setting
sed -i "s|\$(PROJ_prefix)/lib|\$(PROJ_prefix)/lib$LIBDIRSUFFIX|" Makefile.config

if [ "$CLANG" != "no" ]; then
  sed -i "s|\$(PROJ_prefix)/lib|\$(PROJ_prefix)/lib$LIBDIRSUFFIX|" tools/clang/lib/Headers/Makefile
fi

# Build:
make $NUMJOBS || make || failmake

# Install into package framework:
make install DESTDIR=$PKG || failinstall

if [ "$CLANG" != "no" ]; then
  # install clang-static-analyzer
  mkdir -vpm755 $PKG/usr/lib$LIBDIRSUFFIX/clang-analyzer
  cp -fa tools/clang/tools/scan-{build,view} \
    $PKG/usr/lib$LIBDIRSUFFIX/clang-analyzer/ || exit 1
  for i in scan-{build,view}; do
    ln -vfs /usr/lib$LIBDIRSUFFIX/clang-analyzer/$i/$i \
      $PKG/usr/bin/$i || exit 1
  done
  for i in ccc c++; do
    ln -vfs /usr/lib$LIBDIRSUFFIX/clang-analyzer/scan-build/$i-analyzer \
      $PKG/usr/bin/$i-analyzer || exit 1
  done
fi

# 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

# Move man page directory:
mv $PKG/usr/share/man $PKG/usr/
# Try to remove /usr/share, which should be empty now.  If it's not, fine.
rmdir $PKG/usr/share

# Copy documents:
mkdir -p $PKG/usr/doc/$PKGNAM-$VERSION
cp -fav CREDITS* LICENSE* README* $PKG/usr/doc/$PKGNAM-$VERSION
mv -fv $PKG/usr/docs/llvm/* $PKG/usr/doc/$PKGNAM-$VERSION
rm -rf $PKG/usr/docs

if [ "$CLANG" != "no" ]; then
  mkdir -vpm755 $PKG/usr/doc/$PKGNAM-$VERSION/clang
  cp -fav tools/clang/{INSTALL,NOTES,README,TODO}* \
    $PKG/usr/doc/$PKGNAM-$VERSION/clang
fi

# If necessary, start the fakeroot server so we can set file/dir ownerships:
start_fakeroot

# Apply generic Slackware packaging policies:
cd $PKG
slackstripall   # strip all .a archives and all ELFs
slackgzpages -i # compress man & info pages and delete usr/info/dir
slackslack      # chown -R root:root, chmod -R og-w, slackchown, slack644docs
slackdesc       # install slack-desc and doinst.sh
slackmp         # run makepkg -l y -c n

# Perform any final checks on the package:
cd $PKG
slackhlinks     # search for any hard links