#! /bin/sh

CC="gcc"
CXX="g++"
CCFLAGS="$CCFLAGS -Wall -g"
OPTIM="$OPTIM -O3 -funroll-loops"
LINKLIBS="-lz -lbz2"
MAKE=make

# System-specific flags
SYSTEM=`uname -s`
case $SYSTEM in
  BeOS)
    CCFLAGS="$CCFLAGS -Wno-multichar"
    DEFINES="$DEFINES SYS_BEOS"
    LINKLIBS="$LINKLIBS -lbe -ltracker"

    RELEASE=`uname -r`
    case $RELEASE in
      6.0|5.0.4) # Zeta or R5 / BONE beta 7
        SYSTEM="$SYSTEM / BONE"
        LINKLIBS="$LINKLIBS -lbind -lsocket"
        ;;
      5.0*)      # R5 / net_server
        SYSTEM="$SYSTEM / net_server"
        DEFINES="$DEFINES BEOS_NETSERVER"
        LINKLIBS="$LINKLIBS -lnet"
        ;;
      *)
        echo "Unsupported BeOS version"
        exit 1 ;;
    esac
    ;;

  Darwin)
    DEFINES="$DEFINES SYS_DARWIN USE_PTHREAD"
    LINKLIBS="$LINKLIBS -lpthread"
    ;;

  FreeBSD)
    DEFINES="$DEFINES SYS_FREEBSD USE_PTHREAD"
    LINKLIBS="$LINKLIBS -pthread"
    ;;

  NetBSD)
    DEFINES="$DEFINES SYS_NETBSD USE_PTHREAD"
    LINKLIBS="$LINKLIBS -lpthread"
    ;;

  Linux)
    DEFINES="$DEFINES SYS_LINUX USE_PTHREAD _LARGEFILE_SOURCE _FILE_OFFSET_BITS=64"
    LINKLIBS="$LINKLIBS -lpthread -ldl"
    ;;

  CYGWIN*)
    DEFINES="$DEFINES SYS_CYGWIN USE_PTHREAD"
    LINKLIBS="$LINKLIBS -lpthread"
    ;;
  SunOS)
    DEFINES="$DEFINES SYS_SunOS USE_PTHREAD _LARGEFILE_SOURCE _FILE_OFFSET_BITS=64"
    LINKLIBS="$LINKLIBS -lpthread -lsocket -lnsl"
    ;;

  *)
    echo "Unsupported operating system"
    exit 1 ;;
esac
echo
echo "System: $SYSTEM"

# Check for endianness (we need to define WORDS_BIGENDIAN for libdvdread)
cat > testconf.c << EOF
int main()
{
    int i = 1;
    return *( (char *) &i );
}
EOF
if ( $CC -o testconf testconf.c && ./testconf ) > /dev/null 2>&1
then
  echo "Endian: big"
  DEFINES="$DEFINES WORDS_BIGENDIAN"
else
  echo "Endian: little"
fi
rm -f testconf.c testconf

#
# Use Gnu make when available over the built in make
#
if ( make --version | grep GNU ) > /dev/null 2>&1
then
MAKE=make
elif ( gmake --version | grep GNU ) > /dev/null 2>&1
then
MAKE=gmake
else
MAKE=make
fi

# Unless the user wants a release build, configure for SVN snapshots
if test "$1" = "--release" || test "$2" = "--release"; then
    SNAPSHOT=0
else
    SNAPSHOT=1
fi

# We fought the law and the law won
if test "$1" = "--libdvdcss" || test "$2" = "--libdvdcss"; then
    CSS=1
else
    CSS=0
fi

# Generating the HB_BUILD and HB_VERSION for snapshots requires
# the build date, working path, and current SVN revision. 
BUILD_DATE=`date +%Y%m%d`
FULL_PATH=`pwd`
SVN_REV=`svnversion`

# Generate config.jam
rm -f config.jam
cat << EOF > config.jam
CC       = $CC ;
C++      = $CXX ;
LINK     = $CXX ;
CCFLAGS  = $CCFLAGS ;
C++FLAGS = $CCFLAGS ;
OPTIM    = $OPTIM ;
DEFINES  = $DEFINES ;
LINKLIBS = $LINKLIBS ;
MAKE     = $MAKE ;
SNAPSHOT = $SNAPSHOT ;
BUILD_DATE = $BUILD_DATE ;
FULL_PATH = $FULL_PATH ;
SVN_REV = $SVN_REV ;
CSS      = $CSS ;
EOF

echo
echo "* Mac and Linux:"
echo
echo "   Don't run configure by hand, make runs it automatically."
echo
echo "   No, really. That's it. Just type 'make' and hit return."
echo
echo "   You're supposed to be building with make, not jam."
echo "   If you were going to use jam--which you shouldn't--you'd run:"
echo "    './jam' on a Mac, or"
echo "    'jam' on Linux"
echo
echo "* Windows:"
echo
echo "   Be sure to always run configure (this script) before building."
echo "   Then, run:"
echo "    'jam'"
echo
echo "To make jam, boil fruit with sugar and an acid until pectins are released."
echo