#!/bin/bash

ulimit -s unlimited

# llvm.SlackBuild
# Heavily based on the original Slackware build scripts,
# Modified by Stuart Winter for Slackware ARM.
#
# 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.

# 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

# Use gold linker:
mkdir -vpm755 $TMPBUILD/gold
ln -vfs /usr/bin/ld.gold $TMPBUILD/gold/ld
export PATH=$TMPBUILD/gold:$PATH

# Add ARM specific configuration parameters:
case $ARCH in
   arm)     export ARCHCFLAGS="-with-arch=armv5te --with-float=soft --with-optimize-option=' -g -O2 -marm' --with-cloog --with-isl -with-clang-default-openmp-runtime=libomp"
esac

# Extract source:
tar xvvf $CWD/$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 ../
slackhousekeeping

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 ../

pushd $TMPBUILD
slackhousekeeping
popd

# Support GCC built for i586-slackware-linux:
echo "Applying toolchain patch.."
zcat $CWD/clang.toolchains.i586.triple.diff.gz | patch -p1 --verbose || exit 1

# Use i586 $ARCH on 32-bit x86:
sed -r "/ifeq.*CompilerTargetArch/s#i386#i586#g" \
  -i projects/compiler-rt/make/platform/clang_linux.mk

# Allow an in-tree build.
sed -i 's?if test ${srcdir} = "." ; then?if test ${srcdir} = "slkDUMMY" ; then?g' configure
zcat $PORTCWD/sources/llvm.Makefile.config.in.diff.gz | patch -p1 --verbose || exit 1

# ARM patches:
pushd tools
  tar xvvf $PORTCWD/sources/llvm-toolchain*z || exit 1
  for pf in \
  26-set-correct-float-abi.diff \
  atomic_library_1.diff \
  atomic_library_2.diff \
  removeduplicatedeclaration.diff \
   ; do
#    auto_apply_patch debian/patches/$pf || echo "$pf FAILED" >> /tmp/FailEd
    auto_apply_patch debian/patches/$pf || exit 1
  done
popd

# --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
# Configure:
#COLLECT_GCC=gcc \
#COLLECT_LTO_WRAPPER=/usr/libexec/gcc/arm-slackware-linux-gnueabi/*/lto-wrapper \
#CFLAGS="$SLKCFLAGS" \
#CXXFLAGS="$SLKCFLAGS" \
./configure \
   $ARCHCONFARGS \
   --prefix=/usr \
   --libdir=/usr/lib$LIBDIRSUFFIX \
   --sysconfdir=/etc \
   --localstatedir=/var \
   --mandir=/usr/man \
   --enable-optimized \
   --enable-shared \
   --disable-assertions \
   --enable-libffi \
   --with-binutils-include=/usr/include \
   --enable-pic \
   --with-clang-resource-dir="../lib${LIBDIRSUFFIX}/clang/${VERSION}" \
   --build=$ARCH-slackware-linux-gnueabi || failconfig

# 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

# Build:
make $NUMJOBS VERBOSE=1 || make VERBOSE=1 || failmake

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

# 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

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

# 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

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

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

# Copy docs:
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

# 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