endian=`echo $endian | tr [:lower:] [:upper:]`

	os=`echo $os | tr [:lower:] [:upper:]`

	# Check if all params have valid values

	# Endian only allows AUTO, LE and, BE

	if ! echo $endian | grep -Eq "^(AUTO|LE|BE)$"; then

		echo "configure: error: invalid option --endian=$endian"

		echo " Available options are: --endian=[AUTO|LE|BE]"

		exit 1

	fi

		echo "configure: error: invalid option --os=$os"

		exit 1

	fi

	# enable_debug should be between 0 and 4

	if ! echo $enable_debug | grep -q "^[0123]$"; then

		echo "configure: error: invalid option --enable-debug=$enable_debug"

		echo " Available options are: --enable-debug[=0123]"

		exit 1

	fi

	check_build

	check_host

			with_makedepend="0"

			return

		fi

	fi

	rm -f makedepend.tmp makedepend.tmp.bak

	log 1 "checking makedepend... $makedepend"

}

detect_os() {

	if [ $os = "DETECT" ]; then

		# Try first via dumpmachine, then via uname

		os=`echo "$host" | tr [:upper:] [:lower:] | awk '

					/linux/        { print "UNIX";    exit}

					/darwin/       { print "OSX";     exit}

					/freebsd/      { print "FREEBSD"; exit}

					/morphos/      { print "MORPHOS"; exit}

					/beos/         { print "BEOS";    exit}

					/sunos/        { print "SUNOS";   exit}

					/cygwin/       { print "CYGWIN";  exit}

					/mingw/        { print "MINGW";   exit}

					/os2/          { print "OS2";     exit}

					/wince/        { print "WINCE";   exit}

		'`

		if [ -z "$os" ]; then

			os=`LC_ALL=C uname | tr [:upper:] [:lower:] | awk '

					/linux/        { print "UNIX";    exit}

					/darwin/       { print "OSX";     exit}

					/freebsd/      { print "FREEBSD"; exit}

					/morphos/      { print "MORPHOS"; exit}

					/beos/         { print "BEOS";    exit}

					/sunos/        { print "SUNOS";   exit}

					/cygwin/       { print "CYGWIN";  exit}

					/mingw/        { print "MINGW";   exit}

					/os\/2/        { print "OS2";     exit}

			'`

		fi

		if [ -z "$os" ]; then

			log 1 "detecting OS... none detected"

			log 1 "I couldn't detect your OS. Please use --with-os=OS to force one"

			exit 1

		fi

		log 1 "detecting OS... $os"

	else

		log 1 "forcing OS... $os"

	fi

}

detect_sdl() {

	# 0 means no, 1 is auto-detect, 2 is force

	if [ "$with_sdl" = "0" ]; then

	echo "Configuration:"

	echo "  -h, --help                     display this help and exit"

	echo ""

	echo "System types:"

	echo "  --build=BUILD                  configure for building on BUILD [guessed]"

	echo "  --host=HOST                    cross-compile to build programs to run"

	echo "                                 on HOST [BUILD]"

	echo "  --windres=WINDRES              the windres to use [HOST-windres]"

	echo "  --strip=STRIP                  the strip to use [HOST-strip]"

	echo "  --lipo=LIPO                    the lipo to use (OSX ONLY) [HOST-lipo]"

	echo "  --os=OS                        the OS we are compiling for [DETECT]"

	echo "                                 DETECT/UNIX/OSX/FREEBSD/MORPHOS/BEOS/"

	echo "  --endian=ENDIAN                set the endian of the HOST (AUTO/LE/BE)"

	echo "  --revision=rXXXX               overwrite the revision detection."

	echo "                                 Use with care!"

	echo ""

	echo "Paths:"

	echo "  --prefix-dir=dir               specifies the prefix for all installed"

	echo "                                 files [/usr/local]"

	echo "  --binary-dir=dir               location of the binary. Will be prefixed"

	echo "                                 with the prefix-dir [games]"

	echo "  --data-dir=dir                 location of data files (lang, data, gm)."

	echo "                                 Will be prefixed with the prefix-dir"

	echo "                                 [share/games/openttd]"

	/^(	*)#else/ { if (deep == skip) { skip -= 1; } else if (deep - 1 == skip) { skip += 1; } next; }

	/^(	*)#if/   {

		gsub("	", "", $0);

		gsub("^#if ", "", $0);

		if (deep != skip) { deep += 1; next; }

		deep += 1;

		if ($0 == "SDL"         && "'$sdl_config'" == "")          { next; }

		if ($0 == "OSX"         && "'$os'" != "OSX")               { next; }

		if ($0 == "OS2"         && "'$os'" != "OS2")               { next; }

		if ($0 == "DEDICATED"   && "'$enable_dedicated'" != "1")   { next; }

		if ($0 == "COCOA"       && "'$with_cocoa'" == "0")         { next; }

		if ($0 == "BEOS"        && "'$os'" != "BEOS")              { next; }

		if ($0 == "WIN32"       && "'$os'" != "MINGW" &&

		                "'$os'" != "CYGWIN" && "'$os'" != "MSVC" ) { next; }

		if ($0 == "WINCE"       && "'$os'" != "WINCE")             { next; }

		if ($0 == "MSVC"        && "'$os'" != "MSVC")              { next; }

		if ($0 == "DIRECTMUSIC" && "'$with_direct_music'" == "0")  { next; }

		skip += 1;

		next;