#!/bin/bash
#
source "$(dirname "$0")/get-script-header.sh"
ANTLR_HOME_DIR=antlr-3.4

if [ -z "${BUILD_TYPE}" ]; then
  BUILD_TYPE="--disable-shared --enable-static"
fi

if [ -z "${MACHINE_TYPE}" ]; then
  CONFIG_GUESS_SCRIPT=$ANTLR_HOME_DIR/config.guess
  if ! [ -e ${CONFIG_GUESS_SCRIPT} ]; then
    mkdir -p $ANTLR_HOME_DIR
    # Attempt to download once
    webget 'http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD' $CONFIG_GUESS_SCRIPT
    if [ -e $CONFIG_GUESS_SCRIPT ]; then
     chmod +x $CONFIG_GUESS_SCRIPT
   else
     echo "$(basename $0): I need the file config/config.guess to tell MACHINE_TYPE" >&2
     echo "Try running ./autogen.sh, or set the MACHINE_TYPE environment variable" >&2
     echo "(e.g., \"export MACHINE_TYPE=x86_64\")." >&2
     exit 1
    fi
  fi
  # get first nibble from config.guess (x86_64, i686, ...)
  MACHINE_TYPE=$(${CONFIG_GUESS_SCRIPT} | sed 's,-.*,,')
fi

set -x
mkdir -p $ANTLR_HOME_DIR/share/java
mkdir -p $ANTLR_HOME_DIR/bin
mkdir -p $ANTLR_HOME_DIR/src
cd $ANTLR_HOME_DIR || exit 1
webget https://www.antlr3.org/download/antlr-3.4-complete.jar share/java/antlr-3.4-complete.jar 
webget https://www.antlr3.org/download/C/libantlr3c-3.4.tar.gz src/libantlr3c-3.4.tar.gz
tee bin/antlr3 <<EOF
#!/bin/bash
export CLASSPATH=`pwd`/share/java/antlr-3.4-complete.jar:\$CLASSPATH
exec java org.antlr.Tool "\$@"
EOF
chmod a+x bin/antlr3
cd src
gunzip -f libantlr3c-3.4.tar.gz
tar xfv libantlr3c-3.4.tar
cd libantlr3c-3.4

# Use an absolute path for the installation directory to avoid spurious libtool
# warnings about the ANTLR library having moved
PREFIX=$(realpath `pwd`/../..)

# Make antlr3debughandlers.c empty to avoid unreferenced symbols
rm -rf src/antlr3debughandlers.c && touch src/antlr3debughandlers.c
if [ ${MACHINE_TYPE} == 'x86_64' ]; then
  # 64-bit stuff here
  ./configure --enable-64bit --disable-antlrdebug --prefix="${PREFIX}" $ANTLR_CONFIGURE_ARGS $BUILD_TYPE
else
  # 32-bit stuff here
  ./configure --disable-antlrdebug --prefix="${PREFIX}" $ANTLR_CONFIGURE_ARGS $BUILD_TYPE
fi

cp Makefile Makefile.orig
sed 's,^\(CFLAGS = .*\),\1 -fexceptions,' Makefile.orig > Makefile
make CFLAGS="${MAKE_CFLAGS}" CXXFLAGS="${MAKE_CXXFLAGS}" LDFLAGS="${MAKE_LDFLAGS}"
make install

if [[ $WINDOWS_BUILD == "yes" ]]; then
  exit 0
fi

cd ../..
mv lib/libantlr3c.a lib/libantlr3c-static.a

cd src/libantlr3c-3.4
make clean

if [ ${MACHINE_TYPE} == 'x86_64' ]; then
  # 64-bit stuff here
  ./configure --enable-64bit --with-pic --disable-antlrdebug --prefix="${PREFIX}" $ANTLR_CONFIGURE_ARGS $BUILD_TYPE
else
  # 32-bit stuff here
  ./configure --with-pic --disable-antlrdebug --prefix="${PREFIX}" $ANTLR_CONFIGURE_ARGS $BUILD_TYPE
fi

cp Makefile Makefile.orig
sed 's,^\(CFLAGS = .*\),\1 -fexceptions,' Makefile.orig > Makefile
make CFLAGS="${MAKE_CFLAGS}" CXXFLAGS="${MAKE_CXXFLAGS}" LDFLAGS="${MAKE_LDFLAGS}"
make install
cd ../..
mv lib/libantlr3c.la lib/libantlr3c.la.orig
awk '/^old_library=/ {print "old_library='\''libantlr3c-static.a'\''"} /^library_names=/ {print "library_names='\''libantlr3c.a'\''"} !/^old_library=/ && !/^library_names=/ {print}' < lib/libantlr3c.la.orig > lib/libantlr3c.la
set +x
cd ..

# echo
# echo Invalidating generated parsers..
# touch src/parser/*/*.g

if [ ${MACHINE_TYPE} == 'x86_64' ]; then
  # 64-bit stuff here
  echo ============== WARNING ====================
  echo The script guessed that this machine is 64 bit.
  echo If antlr should be built as 32 bit \(i.e. -m32\),
  echo please rerun the script as
  echo     MACHINE_TYPE=\"x86\" ./get-antlr3.4

else
  # 32-bit stuff here
  echo ============== WARNING ==================== 
  echo The script guessed that this machine is 32 bit.
  echo If antlr should be built as 64 bit \(i.e. -m64\),
  echo please rerun the script as
  echo     MACHINE_TYPE=\"x86_64\" ./get-antlr3.4
fi

echo
echo ===================== Now configure CVC4 with =====================
echo ./configure.sh