#!/bin/sh
#
# Some things this script could/should do when finished
#
# * detect whether it's a GNU compiler or not (for compiler settings)
# * command line options to...
#   - override the host settings (for cross compiles
#   - whether to do a debug build (with -g) or an optimized build (-O3 etc.)
# * detect whether the chosen backend is available (e.g. call sdl-config)
# * ....


# use environment vars if set
CXXFLAGS="$CXXFLAGS $CPPFLAGS"

# Backslashes into forward slashes:
# The following OS/2 specific code is performed to deal with handling of backslashes by ksh.
# Borrowed from the Sane configure script

if test "$ac_emxsupport" != "no" -a "$ac_emxsupport" != "NO"; then
  ac_save_IFS="$IFS"
  IFS="\\"
  ac_TEMP_PATH=
  for ac_dir in $PATH; do
    IFS=$ac_save_IFS
    if test -z "$ac_TEMP_PATH"; then
      ac_TEMP_PATH="$ac_dir"
    else
      ac_TEMP_PATH="$ac_TEMP_PATH/$ac_dir"
    fi
  done
  export PATH="$ac_TEMP_PATH"
  unset ac_TEMP_PATH
fi


# default lib behaviour yes/no/auto
_vorbis=auto
_tremor=auto
_flac=auto
_mad=auto
_alsa=auto
_zlib=auto
_mpeg2=auto
_fluidsynth=auto
_mt32emu=yes
# default option behaviour yes/no
_build_scumm=yes
_build_scumm_7_8=yes
_build_he=yes
_build_simon=yes
_build_sky=yes
_build_sword1=yes
_build_sword2=yes
_build_queen=yes
_build_saga=yes
_build_gob=yes
_build_kyra=yes
_need_memalign=no
_build_plugins=no
_nasm=auto
_build_hq_scalers=yes
# more defaults
_backend=sdl
_ranlib=ranlib
_install=install
_ar="ar cru"
_mkdir="mkdir -p"
_echo=printf
_cat=cat
_rm="rm -f"
_rm_rec="$_rm -r"
_zip="zip -q"
_cp=cp
_win32path="C:/scummvm"
_sdlconfig=sdl-config
_sdlpath="$PATH"
_nasmpath="$PATH"
NASMFLAGS=""
NASM=""
_prefix=/usr/local
_have_x86=""

_srcdir=`dirname $0`

# TODO: We should really use mktemp(1) to determine a random tmp file name.
# However, that tool might not be available everywhere.
TMPO=${_srcdir}/scummvm-conf
TMPC=${TMPO}.cpp
TMPLOG=${_srcdir}/config.log

# For cross compiling
_host=""
_host_cpu=""
_host_vendor=""
_host_os=""

# config.h defaults
_def_linupy="#undef LINUPY"

cc_check() {
	echo >> "$TMPLOG"
	cat "$TMPC" >> "$TMPLOG"
	echo >> "$TMPLOG"
	echo "$CXX $TMPC -o $TMPO$EXEEXT $@" >> "$TMPLOG"
	rm -f "$TMPO$EXEEXT"
	( $CXX "$TMPC" -o "$TMPO$EXEEXT" "$@" ) >> "$TMPLOG" 2>&1
	TMP="$?"
	echo >> "$TMPLOG"
	return "$TMP"
}

echocheck () {
	echo_n "Checking for $@... "
}

#
# Check whether the given command is a working C++ compiler
#
test_compiler ()
{
cat <<EOF >tmp_cxx_compiler.cpp
class Foo {
	int a;
};
int main(int argc, char **argv)
{
	Foo *a = new Foo();
	delete a;
	return 0;
}
EOF

if test -n "$_host"; then
	# In cross-compiling mode, we cannot run the result
	eval "$1 -o tmp_cxx_compiler$EXEEXT tmp_cxx_compiler.cpp 2> /dev/null" && rm -f tmp_cxx_compiler$EXEEXT tmp_cxx_compiler.cpp
else
	eval "$1 -o tmp_cxx_compiler$EXEEXT tmp_cxx_compiler.cpp 2> /dev/null" && eval "./tmp_cxx_compiler 2> /dev/null" && rm -f tmp_cxx_compiler$EXEEXT tmp_cxx_compiler.cpp
fi
}

#
# Determine sdl-config
#
# TODO: small bit of code to test sdl useability
find_sdlconfig()
{

	echo_n "Looking for sdl-config... "
	sdlconfigs="$_sdlconfig:sdl-config:sdl11-config:sdl12-config"
	_sdlconfig=
	
	IFS="${IFS=   }"; ac_save_ifs="$IFS"; IFS="$SEPARATOR"
	for path_dir in $_sdlpath; do
                #reset separator to parse sdlconfigs
                IFS=":"
		for sdlconfig in $sdlconfigs; do
			if test -x "$path_dir/$sdlconfig" ; then
				_sdlconfig="$path_dir/$sdlconfig"
				echo $_sdlconfig
				break
			fi
		done
	done
	
	IFS="$ac_save_ifs"
	
	if test -z "$_sdlconfig"; then
		echo "none found!"
		exit 1
	fi
}

#
# Function to provide echo -n for bourne shells that don't have it
#
echo_n() 
{ 
	printf "$@"
}

#
# Determine a data type with the given length
#
find_type_with_size ()
{
cat <<EOF >tmp_find_type_with_size.cpp
#include <stdio.h>
int main(int argc, char **argv)
{
	int size = argv[1][0] - '0';
	if (size == sizeof(int))
		printf("int\n");
	else if (size == sizeof(short))
		printf("short\n");
	else if (size == sizeof(char))
		printf("char\n");
	else if (size == sizeof(long))
		printf("long\n");
	else {
		printf("unknown\n");
		return 1;
	}

	return 0;
}
EOF
if eval "$CXX -o tmp_find_type_with_size$EXEEXT tmp_find_type_with_size.cpp"; then
	datatype=`./tmp_find_type_with_size $1`
	if test "$datatype" = "unknown"; then
		echo "couldn't find data type with $1 bytes"
		exit 1
	fi
fi
rm -f tmp_find_type_with_size$EXEEXT tmp_find_type_with_size.cpp
echo $datatype
}

CheckNASM()
{
	echocheck "nasm"
	if test "$_nasm" = no ; then
		echo "disabled"
		return;
	fi

	IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS=$SEPARATOR
		
	for path_dir in $_nasmpath; do
		if test -x "$path_dir/nasm" ; then
			NASM="$path_dir/nasm"
			echo $NASM
			break
		fi
	done
		
	IFS="$ac_save_ifs"

	if test x$NASM = x -o x$NASM = x'"$NASM"'; then
		echo "not found"
		_nasm=no
	else
		case $_host_os in
			mingw* | cygwin*)
				NASMFLAGS="-f win32"
			;;
			*)
				NASMFLAGS="-f elf"
			;;
		esac
		_nasm=yes
	fi
}

#
# Greet user
#

echo "Running ScummVM configure..."
echo "Configure run on" `date` > $TMPLOG

#
# Check any parameters we received
#
# TODO:
# * Change --disable-mad / --enable-mad to the way it's done in autoconf:
#  That is, --without-mad / --with-mad=/prefix/to/mad. Useful for people
#  who have Mad/Vorbis/ALSA installed in a non-standard locations.
#

for parm in "$@" ; do
  if test "$parm" = "--help" || test "$parm" = "-help" || test "$parm" = "-h" ; then
    cat << EOF

Usage: $0 [OPTIONS]...

Configuration:
  -h, --help             display this help and exit
  --backend=BACKEND      backend to build (sdl, x11, morphos, dc, gp32, null) [sdl]

Installation directories:
  --prefix=DIR           use this prefix for installing ScummVM [/usr/local]
  --bindir=DIR           directory to install the scummvm binary in [PREFIX/bin]
  --mandir=DIR           directory to install the manpage in [PREFIX/man]

Special configuration feature:
  --host=HOST            cross-compile to target HOST (arm-linux, ...)
                         special targets: linupy for Yopy PDA

Optional Features:
  --disable-debug          disable building with debugging symbols
  --disable-scumm          don't build the SCUMM engine
  --disable-scumm-7-8      exclude v7 and v8 game in SCUMM engine (ft, dig, comi and demos)
  --disable-he             exclude HE70+ games in SCUMM engine
  --disable-simon          don't build the simon engine
  --disable-sky            don't build the Beneath a Steel Sky engine
  --disable-sword1         don't build the Broken Sword 1 engine
  --disable-sword2         don't build the Broken Sword 2 engine
  --disable-queen          don't build the Flight of the Amazon Queen engine
  --disable-saga           don't build the SAGA engine
  --disable-gob            don't build the Gobli*ns engine
  --disable-kyra           don't build the Legend of Kyrandia engine
  --enable-plugins         build engines as loadable modules instead of
                           static linking them
  --disable-mt32emu        don't enable the integrated MT-32 emulator
  --disable-hq-scalers     exclude HQ2x and HQ3x scalers

Optional Libraries:
  --with-alsa-prefix=DIR   Prefix where alsa is installed (optional)
  --disable-alsa           disable ALSA midi sound support [autodetect]

  --with-ogg-prefix=DIR    Prefix where libogg is installed (optional)
  --with-vorbis-prefix=DIR Prefix where libvorbis is installed (optional)
  --disable-vorbis         disable Ogg Vorbis support [autodetect]

  --with-tremor-prefix=DIR Prefix where tremor is installed (optional)
  --disable-tremor         disable tremor support [autodetect]

  --with-mad-prefix=DIR    Prefix where libmad is installed (optional)
  --disable-mad            disable libmad (MP3) support [autodetect]

  --with-flac-prefix=DIR   Prefix where libFLAC is installed (optional)
  --disable-flac           disable FLAC support [autodetect]

  --with-zlib-prefix=DIR   Prefix where zlib is installed (optional)
  --disable-zlib           disable zlib (compression) support [autodetect]

  --with-mpeg2-prefix=DIR  Prefix where libmpeg2 is installed (optional)
  --disable-mpeg2          disable mpeg2 codec for cutscenes [autodetect]

  --with-fluidsynth-prefix=DIR  Prefix where libfluidsynth is installed (optional)
  --disable-fluidsynth     disable fluidsynth MIDI driver [autodetect]

  --with-sdl-prefix=DIR    Prefix where the sdl-config script is installed (optional)

  --with-nasm-prefix=DIR   Prefix where nasm executable is installed (optional)
  --disable-nasm           disable assembly language optimizations [autodetect]

Some influential environment variables:
  LDFLAGS   linker flags, e.g. -L<lib dir> if you have libraries in a
            nonstandard directory <lib dir>
  CXX       C++ compiler command
  CXXFLAGS  C++ compiler flags
  CPPFLAGS  C++ preprocessor flags, e.g. -I<include dir> if you have
            headers in a nonstandard directory <include dir>

EOF
    exit 0
  fi
done # for parm in ...

DEBFLAGS="-g"

for ac_option in $@; do
    case "$ac_option" in
      --disable-scumm)          _build_scumm=no ;;
      --disable-scumm-7-8)      _build_scumm_7_8=no ;;
      --disable-he)             _build_he=no ;;
      --disable-simon)          _build_simon=no ;;
      --disable-sky)            _build_sky=no ;;
      --disable-sword1)         _build_sword1=no ;;
      --disable-sword2)         _build_sword2=no ;;
      --disable-queen)          _build_queen=no ;;
      --disable-saga)           _build_saga=no ;;
      --disable-gob)            _build_gob=no ;;
      --disable-kyra)            _build_kyra=no ;;
      --disable-hq-scalers)     _build_hq_scalers=no ;;
      --enable-alsa)            _alsa=yes       ;;
      --disable-alsa)           _alsa=no        ;;
      --enable-vorbis)          _vorbis=yes     ;;
      --disable-vorbis)         _vorbis=no      ;;
      --enable-tremor)          _tremor=yes     ;;
      --disable-tremor)         _tremor=no      ;;
      --enable-flac)            _flac=yes       ;;
      --disable-flac)           _flac=no        ;;
      --enable-mad)             _mad=yes        ;;
      --disable-mad)            _mad=no         ;;
      --enable-zlib)            _zlib=yes       ;;
      --disable-zlib)           _zlib=no        ;;
      --enable-nasm)            _nasm=yes       ;;
      --disable-nasm)           _nasm=no        ;;
      --disable-mpeg2)          _mpeg2=no       ;;
      --disable-fluidsynth)     _fluidsynth=no  ;;
      --enable-plugins)         _build_plugins=yes ;;
      --enable-mt32emu)         _mt32emu=yes    ;;
      --disable-mt32emu)        _mt32emu=no     ;;
      --with-fluidsynth-prefix=*)
        arg=`echo $ac_option | cut -d '=' -f 2`
        FLUIDSYNTH_CFLAGS="-I$arg/include"
        FLUIDSYNTH_LIBS="-L$arg/lib"
        ;;
      --with-mpeg2-prefix=*)
        arg=`echo $ac_option | cut -d '=' -f 2`
        MPEG2_CFLAGS="-I$arg/include"
        MPEG2_LIBS="-L$arg/lib"
        ;;
      --with-alsa-prefix=*)
        arg=`echo $ac_option | cut -d '=' -f 2`
        ALSA_CFLAGS="-I$arg/include"
        ALSA_LIBS="-L$arg/lib"
        ;;
      --with-ogg-prefix=*)
        arg=`echo $ac_option | cut -d '=' -f 2`
        OGG_CFLAGS="-I$arg/include"
        OGG_LIBS="-L$arg/lib"
        ;;
      --with-vorbis-prefix=*)
        arg=`echo $ac_option | cut -d '=' -f 2`
        VORBIS_CFLAGS="-I$arg/include"
        VORBIS_LIBS="-L$arg/lib"
        ;;
      --with-tremor-prefix=*)
        arg=`echo $ac_option | cut -d '=' -f 2`
        TREMOR_CFLAGS="-I$arg/include"
        TREMOR_LIBS="-L$arg/lib"
        ;;
      --with-flac-prefix=*)
        arg=`echo $ac_option | cut -d '=' -f 2`
        FLAC_CFLAGS="-I$arg/include"
        FLAC_LIBS="-L$arg/lib"
        ;;
      --with-mad-prefix=*)
        arg=`echo $ac_option | cut -d '=' -f 2`
        MAD_CFLAGS="-I$arg/include"
        MAD_LIBS="-L$arg/lib"
        ;;
      --with-zlib-prefix=*)
        arg=`echo $ac_option | cut -d '=' -f 2`
        ZLIB_CFLAGS="-I$arg/include"
        ZLIB_LIBS="-L$arg/lib"
        ;;
      --backend=*)
        _backend=`echo $ac_option | cut -d '=' -f 2`
        ;;
      --enable-debug)
        # debug is enabled by default
        ;;
      --disable-debug)
        DEBFLAGS=""
        ;;
      --enable-release)
        DEBFLAGS="-O2"
        ;;
      --with-sdl-prefix=*)
        arg=`echo $ac_option | cut -d '=' -f 2`
        _sdlpath="$arg:$arg/bin"
        ;;
      --with-nasm-prefix=*)
        arg=`echo $ac_option | cut -d '=' -f 2`
        _nasmpath="$arg:$arg/bin"
        ;;
      --host=*)
        _host=`echo $ac_option | cut -d '=' -f 2`
        ;;
      --prefix=*)
        _prefix=`echo $ac_option | cut -d '=' -f 2`
        ;;
      --bindir=*)
        _bindir=`echo $ac_option | cut -d '=' -f 2`
        ;;
      --mandir=*)
        _mandir=`echo $ac_option | cut -d '=' -f 2`
        ;;
      *)
        echo "error: unrecognised option: $ac_option
Try \`$0 --help' for more information." >&2
        exit 1
        ;;
    esac;
done;

CXXFLAGS="$CXXFLAGS $DEBFLAGS"

case $_host in
linupy)
	_host_os=linux
	_host_cpu=arm
	;;
arm-riscos)
	_host_os=riscos
	_host_cpu=arm
	;;
ppc-amigaos)
	_host_os=amigaos
	_host_cpu=ppc
	;;
*)
	guessed_host=`$_srcdir/config.guess`
	_host_cpu=`echo $guessed_host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\1/'`
	_host_os=`echo $guessed_host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
	_host_vendor=`echo $guessed_host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\2/'`
	;;
esac

#
# Determine extension used for executables
#
case $_host_os in
mingw* | cygwin* | os2-emx*)
	EXEEXT=".exe"
	;;
arm-riscos)
	EXEEXT=",ff8"
	;;
*)
	EXEEXT=""
	;;
esac

#
# Determine separator used for $PATH
#
case $_host_os in
os2-emx* )
        SEPARATOR=";"
        ;;
* )
        SEPARATOR=":"
        ;;
esac

#
# Determine the C++ compiler
#
echo_n "Looking for C++ compiler... "
if test -n "$_host"; then
	compilers="$CXX $_host_cpu-$_host_os-g++ $_host_cpu-$_host_os-c++"
else
	compilers="$CXX g++ c++"
fi

CXX=
for compiler in $compilers; do
	if test_compiler $compiler; then
	CXX=$compiler
	echo $CXX
	break
	fi
done
if test -z $CXX; then
	echo "none found!"
	exit 1
fi

#
# Determine the compiler version

echocheck "compiler version"

cxx_name=`( $cc -v ) 2>&1 | tail -n 1 | cut -d ' ' -f 1`
cxx_version=`( $CXX -dumpversion ) 2>&1`
if test "$?" -gt 0; then
	cxx_version="not found"
fi

case $cxx_version in
	2.95.[2-9]|2.95.[2-9][-.]*|3.[0-9]|3.[0-9].[0-9]|3.[0-9].[0-9][-.]*|4.[0-9].[0-9]|4.[0-9].[0-9][-.]*)
		_cxx_major=`echo $cxx_version | cut -d '.' -f 1`
		_cxx_minor=`echo $cxx_version | cut -d '.' -f 2`
		cxx_version="$cxx_version, ok"
		cxx_verc_fail=no
		;;
	# whacky beos version strings
	2.9-beos-991026*|2.9-beos-000224*)	
		_cxx_major=2
		_cxx_minor=95
		cxx_version="$cxx_version, ok"
		cxx_verc_fail=no
		;;
	3_4)
		_cxx_major=3
		_mxx_minor=4
		;;
	'not found')
		cxx_verc_fail=yes
		;;
	*)
		cxx_version="$cxx_version, bad"
		cxx_verc_fail=yes
		;;
esac

echo "$cxx_version"

if test "$cxx_verc_fail" = yes ; then
	echo
	echo "The version of your compiler is not supported at this time"
	echo "Please ensure you are using GCC 2.95.x or GCC 3.x"
	exit 1	
fi

#
# Do CXXFLAGS now we know the compiler version
#

if test "$_cxx_major" -ge "3" ; then
	case $_host_os in
	mingw* | cygwin*)
		CXXFLAGS="$CXXFLAGS -W -Wno-unused-parameter"
		;;
	*)
		CXXFLAGS="$CXXFLAGS -ansi -W -Wno-unused-parameter"
		;;
	esac
	_make_def_HAVE_GCC3='HAVE_GCC3 = 1'
fi;

#
# Engine selection
#
if test "$_build_scumm" = no ; then
	_mak_scumm='DISABLE_SCUMM = 1'
else
	_mak_scumm='# DISABLE_SCUMM = 1'
fi

if test "$_build_scumm_7_8" = no ; then
	_mak_scumm_7_8='DISABLE_SCUMM_7_8 = 1'
else
	_mak_scumm_7_8='# DISABLE_SCUMM_7_8 = 1'
fi

if test "$_build_he" = no ; then
	_mak_he='DISABLE_HE = 1'
else
	_mak_he='# DISABLE_HE = 1'
fi

if test "$_build_simon" = no ; then
	_mak_simon='DISABLE_SIMON = 1'
else
	_mak_simon='# DISABLE_SIMON = 1'
fi

if test "$_build_sky" = no ; then
	_mak_sky='DISABLE_SKY = 1'
else
	_mak_sky='# DISABLE_SKY = 1'
fi

if test "$_build_sword1" = no ; then
	_mak_sword1='DISABLE_SWORD1 = 1'
else
	_mak_sword1='# DISABLE_SWORD1 = 1'
fi

if test "$_build_sword2" = no ; then
	_mak_sword2='DISABLE_SWORD2 = 1'
else
	_mak_sword2='# DISABLE_SWORD2 = 1'
fi

if test "$_build_queen" = no ; then
	_mak_queen='DISABLE_QUEEN = 1'
else
	_mak_queen='# DISABLE_QUEEN = 1'
fi

if test "$_build_kyra" = no ; then
	_mak_kyra='DISABLE_KYRA = 1'
else
	_mak_kyra='# DISABLE_KYRA = 1'
fi

if test "$_build_saga" = no ; then
	_mak_saga='DISABLE_SAGA = 1'
else
	_mak_saga='# DISABLE_SAGA = 1'
fi

if test "$_build_gob" = no ; then
	_mak_gob='DISABLE_GOB = 1'
else
	_mak_gob='# DISABLE_GOB = 1'
fi

if test "$_build_hq_scalers" = no ; then
	_mak_hq_scalers='DISABLE_HQ_SCALERS = 1'
else
	_mak_hq_scalers='# DISABLE_HQ_SCALERS = 1'
fi

if test -n "$_host"; then
	# Cross-compiling mode - add your target here if needed
	case "$_host" in
		linupy|arm-riscos)
			echo "Cross-compiling to $_host, forcing endianness, alignment and type sizes"
			DEFINES="$DEFINES -DUNIX"
			_def_endianness='#define SCUMM_LITTLE_ENDIAN'
			_def_align='#define SCUMM_NEED_ALIGNMENT'
			_def_linupy="#define DLINUPY"
			type_1_byte='char'
			type_2_byte='short'
			type_4_byte='int'
			;;
		arm-linux)
			echo "Cross-compiling to $_host, forcing endianness, alignment and type sizes"
			DEFINES="$DEFINES -DUNIX"
			#not true for all ARM systems, but the interesting ones are all LE. Most (if not all) BE arm devices don't have a screen
			_def_endianness='#define SCUMM_LITTLE_ENDIAN'
			_def_align='#define SCUMM_NEED_ALIGNMENT'
			type_1_byte='char'
			type_2_byte='short'
			type_4_byte='int'
			;;
		ppc-amigaos)
			echo "Cross-compiling to $_host, forcing endianness, alignment and type sizes"
			_def_endianness='#define SCUMM_BIG_ENDIAN'
			_def_align='#define	SCUMM_NEED_ALIGNMENT'
			type_1_byte='char'
			type_2_byte='short'
			type_4_byte='long'
			CXXFLAGS="$CFLAGS -newlib -mstrict-align -mcpu=750 -mtune=7400"
			LDFLAGS="$LDFLAGS -newlib"
			;;
		*)
			echo "Cross-compiling to unknown target $_host, please add your target to configure."
			exit 1
			;;
	esac
	
else
	#
	# Determine build settings
	#
	# TODO - also add an command line option to override this?!?
	echo_n "Checking hosttype... "
	echo $_host_os
	case $_host_os in
		linux* | openbsd* | freebsd* | netbsd* | bsd* | sunos* | hpux* | beos*)
			DEFINES="$DEFINES -DUNIX"
			;;
		irix*)
			DEFINES="$DEFINES -DUNIX"
			_ranlib=:
			;;
		darwin*)
			DEFINES="$DEFINES -DUNIX -DMACOSX"
			LIBS="$LIBS -framework QuickTime -framework AudioUnit -framework AudioToolbox -framework Carbon -framework CoreMIDI"
			# TODO: Add proper check for Altivec support in the compiler...
			DEFINES="$DEFINES -DHAS_ALTIVEC"
			CXXFLAGS="$CXXFLAGS -faltivec"
			;;
		mingw*)
			DEFINES="$DEFINES -DWIN32"
			LIBS="$LIBS -lmingw32 -lwinmm"
			OBJS="$OBJS scummvmico.o"
			;;
		cygwin*)
			DEFINES="$DEFINES -mno-cygwin -DWIN32"
			LIBS="$LIBS -mno-cygwin -lmingw32 -lwinmm"
			OBJS="$OBJS scummvmico.o"
			;;
                os2-emx*)
                        DEFINES="$DEFINES -DUNIX"
                        ;;
		# given this is a shell script assume some type of unix
		*)
			echo "WARNING: could not establish system type, assuming unix like"
			DEFINES="$DEFINES -DUNIX"
			;;
	esac

	#
	# Check for endianness
	#
	echo_n "Checking endianness... "
	cat <<EOF >tmp_endianness_check.cpp
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char **argv)
{
	unsigned int data = 0x01234567;
	char *ptr = (char *)&data;
	if (ptr[0] == 0x01 && ptr[1] == 0x23 && ptr[2] == 0x45 && ptr[3] == 0x67)
		printf("big\n");
	else if (ptr[3] == 0x01 && ptr[2] == 0x23 && ptr[1] == 0x45 && ptr[0] == 0x67)
		printf("little\n");
	else
		printf("unknown\n");
	return 0;
}
EOF
	$CXX -o tmp_endianness_check$EXEEXT tmp_endianness_check.cpp
	endianness=`./tmp_endianness_check`
	echo $endianness;
	case $endianness in
		big)
			_def_endianness='#define SCUMM_BIG_ENDIAN'
			;;
		little)
			_def_endianness='#define SCUMM_LITTLE_ENDIAN'
			;;
		*)
			exit 1
			;;
	esac
	rm -f tmp_endianness_check$EXEEXT tmp_endianness_check.cpp

	#
	# Check whether we can use x86 asm routines
	#
	echo_n "Running on x86... "
	case $_host_cpu in
		i386|i486|i586|i686)
			_have_x86=yes
			;;
		*)
			_have_x86=no
			;;
	esac

	if test "$_have_x86" = yes ; then
		_def_x86='#define HAVE_X86'
	else
		_def_x86='#undef HAVE_X86'
	fi
	echo "$_have_x86"

	#
	# Check whether memory alignment is required
	#
	echo_n "Alignment required... "
	case $_host_cpu in
		arm*)
			_need_memalign=yes
			;;
		alpha*)
			# Hardcode alignment requirements for Alpha processsors
			_need_memalign=yes
			;;
		*)
			# Try to auto-detect....
			cat > $TMPC << EOF
#include <stdlib.h>
#include <signal.h>
int main(int argc, char **argv)
{
	unsigned char test[8] = { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88 };
	signal(SIGBUS, exit);
	signal(SIGABRT, exit);
	signal(SIGSEGV, exit);
	if (*((unsigned int *)(test + 1)) != 0x55443322 && *((unsigned int *)(test + 1)) != 0x22334455) {
		return 1;
	}
	return 0;
}
EOF
 		   _need_memalign=yes
			cc_check && $TMPO && _need_memalign=no
			;;
	esac

	if test "$_need_memalign" = yes ; then
		_def_align='#define SCUMM_NEED_ALIGNMENT'
	else
		_def_align='#undef SCUMM_NEED_ALIGNMENT'
	fi
	echo "$_need_memalign"

	#
	# Determine data type sizes
	# TODO: proper error checking
	# TODO: Actually, we should check individually for both signed & unsigned
	# data types - there are systems on which the size of an unsigned int
	# differs from that of a signed int!
	# However, so far we haven't encountered one of those, so we can live with
	# the limited check for now.
	#
	echo_n "Type with 1 byte... "
	type_1_byte=`find_type_with_size 1`
	echo "$type_1_byte"
	
	echo_n "Type with 2 bytes... "
	type_2_byte=`find_type_with_size 2`
	echo "$type_2_byte"
	
	echo_n "Type with 4 bytes... "
	type_4_byte=`find_type_with_size 4`
	echo "$type_4_byte"
	
fi

#
# Check whether plugin support is requested and possible
#
echo_n "Checking whether building plugins was requested... "
echo "$_build_plugins"
_mak_plugins=
_def_plugin=

if test "$_build_plugins" = yes ; then
    echo_n "Checking whether building plugins is supported... "
    case $_host_os in
	linux*)
_def_plugin='
#define PLUGIN_PREFIX	"lib"
#define PLUGIN_SUFFIX	".so"
'
_mak_plugins='
BUILD_PLUGINS := 1
PLUGIN_PREFIX := lib
PLUGIN_SUFFIX := .so
PLUGIN_EXTRA_DEPS = $(EXECUTABLE)
CXXFLAGS      += -DDYNAMIC_MODULES
CXXFLAGS        += -fpic
PLUGIN_LDFLAGS  += -shared
PRE_OBJS_FLAGS  := -Wl,-export-dynamic -Wl,-whole-archive
POST_OBJS_FLAGS := -Wl,-no-whole-archive
LIBS            += -ldl
'
	    ;;
	freebsd*)
_def_plugin='
#define PLUGIN_PREFIX	"lib"
#define PLUGIN_SUFFIX	".so"
'
_mak_plugins='
BUILD_PLUGINS := 1
PLUGIN_PREFIX := lib
PLUGIN_SUFFIX := .so
PLUGIN_EXTRA_DEPS = $(EXECUTABLE)
CXXFLAGS      += -DDYNAMIC_MODULES
CXXFLAGS        += -fpic
PLUGIN_LDFLAGS  += -shared
PRE_OBJS_FLAGS  := -Wl,-export-dynamic -Wl,-whole-archive
POST_OBJS_FLAGS := -Wl,-no-whole-archive
'
	    ;;
	darwin*)
_def_plugin='
#define PLUGIN_PREFIX	""
#define PLUGIN_SUFFIX	".plugin"
'
_mak_plugins='
BUILD_PLUGINS := 1
PLUGIN_PREFIX := 
PLUGIN_SUFFIX := .plugin
PLUGIN_EXTRA_DEPS = $(EXECUTABLE)
CXXFLAGS      += -DDYNAMIC_MODULES
PLUGIN_LDFLAGS  += -bundle -bundle_loader $(EXECUTABLE) -exported_symbols_list "$(srcdir)/plugin.exp"
PRE_OBJS_FLAGS  := -all_load
POST_OBJS_FLAGS :=
LIBS            += -ldl
'
	    ;;
	*)
	    _build_plugins=no
		_mak_plugins=
		_def_plugin=
	    ;;
    esac
    echo "$_build_plugins"
fi


#
# Check whether integrated MT-32 emulator support is requested
#
if test "$_mt32emu" = no ; then
	_def_mt32emu='#undef USE_MT32EMU'
	_mak_mt32emu='# USE_MT32EMU = 1'
else
	_def_mt32emu='#define USE_MT32EMU'
	_mak_mt32emu='USE_MT32EMU = 1'
fi

#
# Check for Ogg Vorbis
#
echocheck "Ogg Vorbis"
if test "$_vorbis" = auto ; then
	_vorbis=no
	cat > $TMPC << EOF
#include <vorbis/codec.h>
int main(void) { vorbis_packet_blocksize(0,0); return 0; }
EOF
	cc_check $LDFLAGS $CXXFLAGS $OGG_CFLAGS $OGG_LIBS $VORBIS_CFLAGS $VORBIS_LIBS \
	-lvorbis -logg -lm && _vorbis=yes
fi
if test "$_vorbis" = yes ; then
	_def_vorbis='#define USE_VORBIS'
	LIBS="$LIBS $OGG_LIBS $VORBIS_LIBS -lvorbisfile -lvorbis -logg"
	INCLUDES="$INCLUDES $OGG_CFLAGS $VORBIS_CFLAGS"
else
	_def_vorbis='#undef USE_VORBIS'
fi
echo "$_vorbis"

#
# Check for Tremor
#
echocheck "Tremor"
if test "$_tremor" = auto ; then
  _tremor=no
  cat > $TMPC << EOF
#include <tremor/ivorbiscodec.h>
int main(void) { vorbis_packet_blocksize(0,0); return 0; }
EOF
cc_check $LDFLAGS $CXXFLAGS $TREMOR_CFLAGS $TREMOR_LIBS -lvorbisidec && \
  _tremor=yes
fi
if test "$_tremor" = yes && test "$_vorbis" = no; then
  _def_tremor='#define USE_TREMOR'
  _def_vorbis='#define USE_VORBIS'
  LIBS="$LIBS $TREMOR_LIBS -lvorbisidec"
  INCLUDES="$INCLUDES $TREMOR_CFLAGS"
else
  if test "$_vorbis" = yes; then
    _tremor="no (Ogg Vorbis/Tremor support is mutually exclusive)"
  fi
  _def_tremor='#undef USE_TREMOR'
fi
echo "$_tremor"

echocheck "FLAC >= 1.0.1"
if test "$_flac" = auto ; then
	_flac=no
	cat > $TMPC << EOF
#include <FLAC/seekable_stream_decoder.h>
int main(void) { FLAC__seekable_stream_decoder_init( 0 ); return 0; }
EOF
	cc_check $LDFLAGS $CXXFLAGS $FLAC_CFLAGS $FLAC_LIBS \
	-lFLAC -lm && _flac=yes
fi
if test "$_flac" = yes ; then
	_def_flac='#define USE_FLAC'
	LIBS="$LIBS $FLAC_LIBS -lFLAC"
	INCLUDES="$INCLUDES $FLAC_CFLAGS"
else
	_def_flac='#undef USE_FLAC'
fi
echo "$_flac"

#
# Check for MAD (MP3 library)
#
echocheck "MAD"
if test "$_mad" = auto ; then
	_mad=no
	cat > $TMPC << EOF
#include <mad.h>
int main(void) {return 0; }
EOF
	cc_check $LDFLAGS $CXXFLAGS $MAD_CFLAGS $MAD_LIBS -lmad && _mad=yes
fi
if test "$_mad" = yes ; then
	_def_mad='#define USE_MAD'
	LIBS="$LIBS $MAD_LIBS -lmad"
	INCLUDES="$INCLUDES $MAD_CFLAGS"
else
	_def_mad='#undef USE_MAD'
fi
echo "$_mad"

#
# Check for ALSA
#
echocheck "ALSA >= 0.9"
if test "$_alsa" = auto ; then
	_alsa=no
	cat > $TMPC << EOF
#include <alsa/asoundlib.h>
int main(void) { return (!(SND_LIB_MAJOR==0 && SND_LIB_MINOR==9)); }
EOF
	cc_check $LDFLAGS $CXXFLAGS $ALSA_CFLAGS $ALSA_LIBS -lasound && _alsa=yes
fi
if test "$_alsa" = yes ; then
	_def_alsa='#define USE_ALSA'
	LIBS="$LIBS $ALSA_LIBS -lasound"
	INCLUDES="$INCLUDES $ALSA_CFLAGS"
else
	_def_alsa='#undef USE_ALSA'
fi
echo "$_alsa"

#
# Check for ZLib
#
echocheck "zlib"
if test "$_zlib" = auto ; then
	_zlib=no
	cat > $TMPC << EOF
#include <string.h>
#include <zlib.h>
int main(void) { return strcmp(ZLIB_VERSION, zlibVersion()); }
EOF
	cc_check $LDFLAGS $CXXFLAGS $ZLIB_CFLAGS $ZLIB_LIBS -lz && _zlib=yes
fi
if test "$_zlib" = yes ; then
	_def_zlib='#define USE_ZLIB'
	LIBS="$LIBS $ZLIB_LIBS -lz"
	INCLUDES="$INCLUDES $ZLIB_CFLAGS"
else
	_def_zlib='#undef USE_ZLIB'
fi
echo "$_zlib"

#
# Check for LibMPEG2
#
echocheck "libmpeg2 >= 0.3.2"
if test "$_mpeg2" = auto ; then
	_mpeg2=no
	cat > $TMPC << EOF
typedef signed $type_1_byte int8_t;
typedef signed $type_2_byte int16_t;
typedef signed $type_4_byte int32_t;

typedef unsigned $type_1_byte uint8_t;
typedef unsigned $type_2_byte uint16_t;
typedef unsigned $type_4_byte uint32_t;

#include <mpeg2dec/mpeg2.h>
int main(void) {
	/* mpeg2_state_t first appears in 0.4.0 */
	mpeg2_state_t state;

        #ifdef MPEG2_RELEASE
		if (MPEG2_RELEASE >= MPEG2_VERSION(0, 3, 2))
			return 0;
	#endif
	return 1;
}
EOF
	cc_check $LDFLAGS $CXXFLAGS $MPEG2_CFLAGS $MPEG2_LIBS -lmpeg2 && $TMPO && _mpeg2=yes
fi
if test "$_mpeg2" = yes ; then
	_def_mpeg2='#define USE_MPEG2'
	INCLUDES="$INCLUDES $MPEG2_CFLAGS"
	LIBS="$LIBS $MPEG2_LIBS -lmpeg2"
else
	_def_mpeg2='#undef USE_MPEG2'
fi
echo "$_mpeg2"
rm -f $TMPC $TMPO$EXEEXT

#
# Check for libfluidsynth
#
echocheck "libfluidsynth"
if test "$_fluidsynth" = auto ; then
	_fluidsynth=no
	cat > $TMPC << EOF
#include <fluidsynth.h>
int main(void) { return 0; }
EOF
	cc_check $LDFLAGS $CXXFLAGS $FLUIDSYNTH_CFLAGS $FLUIDSYNTH_LIBS -lfluidsynth && _fluidsynth=yes
fi
if test "$_fluidsynth" = yes ; then
	_def_fluidsynth='#define USE_FLUIDSYNTH'
	LIBS="$LIBS $FLUIDSYNTH_LIBS -lfluidsynth"
	INCLUDE="$INCLUDES $FLUIDSYNTH_CFLAGS"
else
	_def_fluidsynth='#undef USE_FLUIDSYNTH'
fi
echo "$_fluidsynth"
rm -f $TMPC $TMPO$EXEEXT

#
# Check for nasm
#
if test "$_have_x86" = yes ; then
    CheckNASM
fi

if test "$_nasm" = yes ; then
	_def_nasm='#define USE_NASM'
	_make_def_HAVE_NASM='HAVE_NASM = 1'
else
	_def_nasm='#undef USE_NASM'
	_make_def_HAVE_NASM='# HAVE_NASM = 1'
fi

#
# figure out installation directories
#
test -z "$_bindir" && _bindir="$_prefix/bin"
test -z "$_mandir" && _mandir="$_prefix/man"

#
# Check which engines ("frontends") are to be built
#
echo
echo "Engines:"
if test "$_build_scumm" = yes ; then
	echo_n "    SCUMM"
	if test "$_build_scumm_7_8" = yes ; then
		echo_n " [v7 & v8 games]"
	fi
	if test "$_build_he" = yes ; then
		echo_n " [HE70+ games]"
	fi
	echo
fi
if test "$_build_simon" = yes ; then
	echo "    Simon the Sorcerer"
fi
if test "$_build_sky" = yes ; then
	echo "    Beneath a Steel Sky"
fi
if test "$_build_sword1" = yes ; then
	echo_n "    Broken Sword 1"
	if test "$_mpeg2" = yes ; then
		echo " (w/ mpeg2 cutscenes)"
	else
		echo "  (without mpeg2 cutscenes)"
	fi
fi
if test "$_build_sword2" = yes ; then
	echo_n "    Broken Sword 2"
	if test "$_mpeg2" = yes ; then
		echo " (w/ mpeg2 cutscenes)"
	else
		echo " (without mpeg2 cutscenes)"
	fi
fi
if test "$_build_queen" = yes ; then
	echo "    Flight of the Amazon Queen"
fi
if test "$_build_saga" = yes ; then
	echo "    SAGA"
fi
if test "$_build_kyra" = yes ; then
	echo "    Legend of Kyrandia"
fi
if test "$_build_gob" = yes ; then
	echo "    Gobli*ns"
fi

echo

echo_n "Backend... "
echo_n "$_backend"

if test "$_nasm" = yes ; then
	echo_n ", assembly routines"
fi

if test "$_build_hq_scalers" = yes ; then
	echo_n ", HQ scalers"
fi

if test "$_mt32emu" = yes ; then
	echo ", MT-32 emu"
else
	echo
fi
#
# Backend related stuff
#
case $_backend in
	null)
		DEFINES="$DEFINES -DUSE_NULL_DRIVER"
		OBJS="$OBJS backends/null/null.o"
		;;
	sdl)
		find_sdlconfig
		INCLUDES="$INCLUDES `$_sdlconfig --cflags`"
		LIBS="$LIBS `$_sdlconfig --libs`"
		MODULES="$MODULES backends/sdl"
		;;
	x11)
		INCLUDES="$INCLUDES -I/usr/X11R6/include"
		LIBS="$LIBS -lpthread -lXext -lX11"
		LDFLAGS="$LDFLAGS -L/usr/X11R6/lib -L/usr/local/lib"
		OBJS="$OBJS backends/x11/x11.o"
		DEFINES="$DEFINES -DX11_BACKEND"
		MODULES="$MODULES backends/x11"
		MODULE_DIRS="$MODULE_DIRS backends/x11"
		;;
	*)
		echo "support for $_backend backend not implemented in configure script yet"
		exit 1
		;;
esac

echo
echo "Creating config.h"
cat > config.h << EOF
/* This file is automatically generated by configure */
/* DO NOT EDIT MANUALLY */

#ifndef CONFIG_H
#define CONFIG_H

$_def_endianness
$_def_align
$_def_x86

$_def_linupy

/* Data types */
typedef unsigned $type_1_byte byte;
typedef unsigned int uint;
typedef unsigned $type_1_byte uint8;
typedef unsigned $type_2_byte uint16;
typedef unsigned $type_4_byte uint32;
typedef signed $type_1_byte int8;
typedef signed $type_2_byte int16;
typedef signed $type_4_byte int32;

/* Libs */
$_def_vorbis
$_def_tremor
$_def_flac
$_def_mad
$_def_alsa
$_def_zlib
$_def_mpeg2
$_def_fluidsynth
$_def_mt32emu

/* Whether we should use i386 assembly routines */
$_def_nasm

/* Plugin settings */
$_def_plugin

#endif /* CONFIG_H */
EOF

echo "Creating config.mak"
cat > config.mak << EOF
# -------- Generated by configure -----------

CXX := $CXX
CXXFLAGS := $CXXFLAGS
LIBS += $LIBS
RANLIB := $_ranlib
INSTALL := $_install
AR := $_ar
MKDIR := $_mkdir
ECHO := $_echo
CAT := $_cat
RM := $_rm
RM_REC := $_rm_rec
ZIP := $_zip
CP := $_cp
WIN32PATH=$_win32path

BACKEND := $_backend
MODULES += $MODULES
MODULE_DIRS += $MODULE_DIRS
EXEEXT := $EXEEXT
NASM := $NASM
NASMFLAGS := $NASMFLAGS

PREFIX := $_prefix
BINDIR := $_bindir
MANDIR := $_mandir

$_mak_plugins
$_make_def_HAVE_GCC3
$_make_def_HAVE_NASM
$_mak_scumm
$_mak_scumm_7_8
$_mak_he
$_mak_simon
$_mak_sky
$_mak_sword1
$_mak_sword2
$_mak_queen
$_mak_kyra
$_mak_saga
$_mak_gob
$_mak_mt32emu

$_mak_hq_scalers

INCLUDES += $INCLUDES
OBJS += $OBJS
DEFINES += $DEFINES
LDFLAGS += $LDFLAGS
EOF

#
# Create a custom Makefile when building outside the source tree
# TODO: Add a better check than just looking for 'Makefile'
#
if test ! -f Makefile ; then
echo "Creating Makefile"

cat > Makefile << EOF
# -------- Generated by configure -----------
srcdir = $_srcdir
vpath %.cpp \$(srcdir)
vpath %.h \$(srcdir)
include \$(srcdir)/Makefile
EOF

fi