#!/bin/sh

# Slackware build script for llvm

# Copyright 2008-2015 Heinz Wiesinger, Amsterdam, The Netherlands
# Copyright 2012, 2013, 2014, 2015  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.

PKGNAM=llvm
VERSION=${VERSION:-$(echo llvm-*.tar.?z* | rev | cut -f 4- -d . | cut -f 1 -d - | rev)}
BUILD=${BUILD:-2}

NUMJOBS=${NUMJOBS:-" -j7 "}

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}
PKG=$TMP/package-$PKGNAM

if [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -march=amdfam10 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

rm -rf $PKG
mkdir -p $TMP $PKG
cd $TMP
rm -rf $PKGNAM-${VERSION}.src $PKGNAM-${VERSION}
tar xvf $CWD/$PKGNAM-$VERSION.src.tar.xz || exit 1

cd $PKGNAM-${VERSION}/tools || cd $PKGNAM-${VERSION}.src/tools || exit 1
  tar xvf $CWD/cfe-$VERSION.src.tar.xz || exit 1
  mv cfe-${VERSION} clang 2>/dev/null || mv cfe-${VERSION}.src clang || exit 1
cd ../

cd tools/clang/tools || exit 1
  tar xvf $CWD/clang-tools-extra-$VERSION.src.tar.xz || exit 1
  mv clang-tools-extra-${VERSION} extra 2>/dev/null \
    || mv clang-tools-extra-${VERSION}.src extra || exit 1
cd ../../../

cd projects || exit 1
  tar xvf $CWD/compiler-rt-$VERSION.src.tar.xz || exit 1
  mv compiler-rt-${VERSION} compiler-rt 2>/dev/null \
    || mv compiler-rt-${VERSION}.src compiler-rt || exit 1
cd ../

chown -R root:root .
find . \
  \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 -o -perm 511 \) \
  -exec chmod 755 {} \; -o \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \;

# --mandir doesn't work currently
# need to disable assertions to make llvm thread-safe
# clang resource dir is a relative path based on the location of the clang binary
CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --libdir=/usr/lib$LIBDIRSUFFIX \
  --sysconfdir=/etc \
  --localstatedir=/var \
  --mandir=/usr/man \
  --enable-optimized \
  --disable-assertions \
  --enable-pic \
  --enable-shared \
  --enable-libffi \
  --with-binutils-include=/usr/include \
  --with-clang-resource-dir="../lib${LIBDIRSUFFIX}/clang/${VERSION}" \
  --build=$ARCH-slackware-linux \
  --host=$ARCH-slackware-linux || exit 1

# compiler-rt uses the clang binary we're about to build so
# we need to be able to execute it from within the build tree.
sed -i "s|\$(BuildMode)/lib|\$(BuildMode)/lib$LIBDIRSUFFIX|" \
  Makefile.rules tools/clang/runtime/compiler-rt/Makefile \
  tools/clang/lib/Headers/Makefile
sed -i "s|\.\./lib|\.\./lib$LIBDIRSUFFIX|" \
  Makefile.rules

# Fix hardcoded libdir
sed -i "s|\$(PROJ_prefix)/lib|\$(PROJ_prefix)/lib$LIBDIRSUFFIX|" \
  Makefile.config tools/clang/lib/Headers/Makefile \
  tools/clang/runtime/compiler-rt/Makefile
sed -i "s|\"lib\"|\"lib${LIBDIRSUFFIX}\"|" \
  tools/clang/lib/Frontend/CompilerInvocation.cpp
sed -i "s|/lib/LLVMgold.so|/lib${LIBDIRSUFFIX}/LLVMgold.so|" \
  tools/clang/lib/Driver/Tools.cpp
sed -i "s|ActiveLibDir = ActivePrefix + \"/lib\"|ActiveLibDir = ActivePrefix + \"/lib${LIBDIRSUFFIX}\"|g" \
  tools/llvm-config/llvm-config.cpp

make $NUMJOBS VERBOSE=1 || make || exit 1
make install DESTDIR=$PKG || exit 1

# Add symlinks for $ARCH-slackware-linux-{clang,clang++}:
( cd $PKG/usr/bin
  ln -sf clang $ARCH-slackware-linux-clang
  ln -sf clang++ $ARCH-slackware-linux-clang++
)

# install clang-static-analyzer
mkdir -p $PKG/usr/lib$LIBDIRSUFFIX/clang-analyzer
cp -pr tools/clang/tools/scan-{build,view} \
  $PKG/usr/lib$LIBDIRSUFFIX/clang-analyzer/ || exit 1
for i in scan-{build,view}; do
  ln -s /usr/lib$LIBDIRSUFFIX/clang-analyzer/$i/$i \
    $PKG/usr/bin/$i || exit 1
done
for i in ccc c++; do
  ln -s /usr/lib$LIBDIRSUFFIX/clang-analyzer/scan-build/$i-analyzer \
    $PKG/usr/bin/$i-analyzer || exit 1
done

# Fix paths in scan-build
sed -i "s|\$RealBin/bin|/usr/bin|" \
  $PKG/usr/lib$LIBDIRSUFFIX/clang-analyzer/scan-build/scan-build
sed -i "s|\$RealBin/sorttable.js|/usr/lib${LIBDIRSUFFIX}/clang-analyzer/scan-build/sorttable.js|" \
  $PKG/usr/lib$LIBDIRSUFFIX/clang-analyzer/scan-build/scan-build
sed -i "s|\$RealBin/scanview.css|/usr/lib${LIBDIRSUFFIX}/clang-analyzer/scan-build/scanview.css|" \
  $PKG/usr/lib$LIBDIRSUFFIX/clang-analyzer/scan-build/scan-build

# fix strange permissions
chmod 755 $PKG/usr/lib$LIBDIRSUFFIX/clang-analyzer/scan-build
chmod 755 $PKG/usr/lib$LIBDIRSUFFIX/clang-analyzer/scan-view
chmod 755 $PKG/usr/lib$LIBDIRSUFFIX/clang-analyzer/scan-view/Resources

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

# Move man page directory:
mv $PKG/usr/share/man $PKG/usr/

# Move scan-build man-page into place
mv $PKG/usr/lib$LIBDIRSUFFIX/clang-analyzer/scan-build/scan-build.1 \
  $PKG/usr/man/man1/

# Strip binaries:
( cd $PKG
  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
)

# Compress manual pages:
find $PKG/usr/man -type f -exec gzip -9 {} \;
for i in $( find $PKG/usr/man -type l ) ; do
  ln -s $( readlink $i ).gz $i.gz
  rm $i
done

mkdir -p $PKG/usr/doc/$PKGNAM-$VERSION/clang
cp -a CREDITS* LICENSE* README* $PKG/usr/doc/$PKGNAM-$VERSION
cp -a tools/clang/{INSTALL,LICENSE,NOTES,README}* \
  $PKG/usr/doc/$PKGNAM-$VERSION/clang
mv $PKG/usr/docs/llvm/* $PKG/usr/doc/$PKGNAM-$VERSION
rm -rf $PKG/usr/docs

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

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