# Public domain

REGISTER("--enable-lockdebug",	"Expensive threads debugging [default: no]")
REGISTER("--enable-warnings",	"Suggested compiler warnings [default: no]")
REGISTER("--enable-threads",	"Thread safety [default: check]")
REGISTER("--enable-gui",	"Build Agar-GUI [default: yes]")
REGISTER("--enable-utf8",	"Unicode text/input support [default: yes]")
REGISTER("--enable-8bpp",	"Support for 8 bpp display [default: yes]")
REGISTER("--enable-16bpp",	"Support for 16 bpp display [default: yes]")
REGISTER("--enable-24bpp",	"Support for 24 bpp display [default: yes]")
REGISTER("--enable-32bpp",	"Support for 32 bpp display [default: yes]")
REGISTER("--enable-network",	"Build network client library [default: check]")
REGISTER("--enable-server",	"Build network server library [default: no]")
REGISTER("--with-gl",		"OpenGL rendering support [default: check]")
REGISTER("--with-jpeg",		"JPEG screenshot support [default: check]")
REGISTER("--with-freetype",	"GUI: Enable FreeType support [default: check]")

# Agar version
HDEFINE(VERSION, "1.3.2")
HDEFINE(RELEASE, "Landscapes Turn To Ash")

# Installation directories
MDEFINE(SHAREDIR, "\${PREFIX}/share/agar")
HDEFINE(SHAREDIR, "$PREFIX/share/agar")
MDEFINE(LOCALEDIR, "\${PREFIX}/share/agar/locale")
HDEFINE(LOCALEDIR, "$PREFIX/share/agar/locale")
MDEFINE(TTFDIR, "\${PREFIX}/share/agar/fonts")
HDEFINE(TTFDIR, "$PREFIX/share/agar/fonts")
MDEFINE(INCLDIR, "\${PREFIX}/include/agar")
HDEFINE(INCLDIR, "$PREFIX/include/agar")

CHECK(cc)
CHECK(sys_types)
CHECK(stdlib_h)
CHECK(unistd_h)
CHECK(limits_h)
CHECK(progname)
CHECK(free_null)
CHECK(math)
CHECK(gethostname)
CHECK(getpwuid)
CHECK(getuid)
CHECK(getenv)
CHECK(setenv)
CHECK(strsep)
CHECK(snprintf)
CHECK(vsnprintf)
CHECK(vasprintf)
CHECK(arc4random)
CHECK(md5)
CHECK(sha1)
CHECK(rmd160)
CHECK(x11)
CHECK(signal)
CHECK(setjmp)
CHECK(strtoll)
CHECK(strtold)
CHECK(altivec)
CHECK(byte_order)

C_DEFINE(_AGAR_INTERNAL)
C_DEFINE(_BSD_SOURCE)
C_INCDIR($SRC)
C_NO_SECURE_WARNINGS()
#C_EXTRA_WARNINGS()
#C_FATAL_WARNINGS()

if [ "${enable_warnings}" = "yes" ]; then
	C_OPTION(-Wall)
	C_OPTION(-Werror)
	C_OPTION(-Wmissing-prototypes)
	MDEFINE(WNO_UNINITIALIZED, "-Wno-uninitialized")
else
	MDEFINE(WNO_UNINITIALIZED, "")
fi

if [ "${enable_lockdebug}" = "yes" ]; then
	HDEFINE(LOCKDEBUG, 1)
else
	HUNDEF(LOCKDEBUG)
fi

# SDL is required.
CHECK(sdl, 1.2.0)
if [ "${HAVE_SDL}" != "yes" ]; then
	echo "*"
	echo "* Agar-GUI requires the SDL library. You can download it "
	echo "* from: http://www.libsdl.org/"
	echo "*"
	exit 1
fi

#
# Check GUI-specific dependencies.
#
if [ "${enable_gui}" != "no" ]; then
	HDEFINE(ENABLE_GUI, 1)

	# Enable Freetype support if the Freetype library is found. Otherwise
	# fall back to the bitmap font engine.
	if [ "${with_freetype}" != "no" ]; then
		CHECK(freetype, 7.0.1)
		if [ "${HAVE_FREETYPE}" != "yes" ]; then
			echo "*"
			echo "* Agar needs FreeType to display vector fonts"
			echo "* (http://www.freetype.org/)."
			echo "*"
			echo "* If you really want to use Agar's built-in low"
			echo "* quality bitmap font engine, run the configure"
			echo "* script again using the --without-freetype flag."
			echo "*"
			echo "* Note that the bundled bitmap font only includes"
			echo "* the basic US-ASCII characters and is not meant"
			echo "* to be used except for porting to new platforms."
			echo "*"
			exit 1
		fi
	else
		HUNDEF(HAVE_FREETYPE)
		MDEFINE(FREETYPE_CFLAGS, "")
		MDEFINE(FREETYPE_LIBS, "")
	fi

	# Enable OpenGL support if an OpenGL library is found.
	if [ "${with_gl}" != "no" ]; then
		CHECK(opengl)
		if [ "${HAVE_OPENGL}" = "yes" ]; then
			MDEFINE(SDL_CFLAGS, "$SDL_CFLAGS $OPENGL_CFLAGS")
		else
			if [ "${with_gl}" = "yes" ]; then
				echo "*"
				echo "* --with-gl was requested, but no OpenGL"
				echo "* library was found. Try running the"
				echo "* configure script again without this"
				echo "* option."
				echo "*"
				exit 1
			else
				HUNDEF(HAVE_OPENGL)
			fi
		fi
	else
		HUNDEF(HAVE_OPENGL)
		MDEFINE(OPENGL_CFLAGS, "")
		MDEFINE(OPENGL_LIBS, "")
	fi

	# Enable JPEG support if libjpeg is found (only used for screenshots).
	if [ "${with_jpeg}" != "no" ]; then
		CHECK(jpeg)
		if [ "${HAVE_JPEG}" != "yes" ]; then
			if [ "${with_jpeg}" = "yes" ]; then
				echo "*"
				echo "* --with-jpeg was requested, but libjpeg"
				echo "* was not found. Try running configure"
				echo "* again without this option."
				echo "*"
				exit 1
			else
				HUNDEF(HAVE_JPEG)
			fi
		fi
	else
		HUNDEF(HAVE_JPEG)
		MDEFINE(JPEG_CFLAGS, "")
		MDEFINE(JPEG_LIBS, "")
	fi
else
	HUNDEF(ENABLE_GUI)

	HUNDEF(HAVE_FREETYPE)
	MDEFINE(FREETYPE_CFLAGS, "")
	MDEFINE(FREETYPE_LIBS, "")
	HUNDEF(HAVE_OPENGL)
	MDEFINE(OPENGL_CFLAGS, "")
	MDEFINE(OPENGL_LIBS, "")
	HUNDEF(HAVE_JPEG)
	MDEFINE(JPEG_CFLAGS, "")
	MDEFINE(JPEG_LIBS, "")
fi

# Enable network support if system supports getaddrinfo().
# XXX Should enable check by default
if [ "${enable_network}" = "yes" ]; then
	CHECK(getaddrinfo)
	if [ "${HAVE_GETADDRINFO}" = "yes" ]; then
		HDEFINE(NETWORK, 1)
	else
		if [ "${enable_network}" = "yes" ]; then
			echo "*"
			echo "* --enable-network was requested, but this system"
			echo "* does not support getaddrinfo(). Try running the"
			echo "* configure script again without this option."
			echo "*"
			exit 1
		else
			HUNDEF(NETWORK)
		fi
	fi
else
	HUNDEF(NETWORK)
	HUNDEF(HAVE_GETADDRINFO)
fi

# Enable network server code only if requested explicitely.
# TODO: other checks
if [ "${enable_server}" = "yes" ]; then
	if [ "${HAVE_GETADDRINFO}" = "yes" ]; then
		HDEFINE(SERVER, 1)
	else
		if [ "${enable_server}" = "yes" ]; then
			echo "*"
			echo "* --enable-server was requested, but this system"
			echo "* does not support getaddrinfo(). Try running the"
			echo "* configure script again without this option."
			echo "*"
			exit 1
		else
			HUNDEF(SERVER)
		fi
	fi
else
	HUNDEF(SERVER)
	HUNDEF(HAVE_GETADDRINFO)
fi

# Enable threads support if POSIX threads are available.
if [ "${enable_threads}" != "no" ]; then
	CHECK(pthreads)
	if [ "${HAVE_PTHREADS}" = "yes" ];
	then
		if [ "${HAVE_PTHREADS_XOPEN}" = "no" ]; then
		if [ "${HAVE_PTHREAD_MUTEX_RECURSIVE}" = "no" ]; then
		if [ "${HAVE_PTHREAD_MUTEX_RECURSIVE_NP}" = "no" ]; then
			if [ "${enable_threads}" = "yes" ]; then
				echo "*"
				echo "* --enable-threads was given, but your"
				echo "* pthreads library lacks support for"
				echo "* recursive mutexes. Try running the"
				echo "* configure script again without this"
				echo "* option."
				echo "*"
				exit 1
			fi
		fi
		fi
		fi
		HDEFINE(THREADS, 1)
	else
		if [ "${enable_threads}" = "yes" ]; then
			echo "*"
			echo "* --enable-threads was given, but no pthreads"
			echo "* library was found on your system. Try running"
			echo "* the configure script again without this option."
			echo "*"
			exit 1
		fi
	fi
else
	HUNDEF(THREADS)
	HUNDEF(HAVE_PTHREADS)
	HUNDEF(HAVE_PTHREADS_XOPEN)
	MDEFINE(PTHREADS_CFLAGS, "")
	MDEFINE(PTHREADS_LIBS, "")
	MDEFINE(PTHREADS_XOPEN_CFLAGS, "")
	MDEFINE(PTHREADS_XOPEN_LIBS, "")
	#
	# Lock macros expand to no-ops when compiled !THREADS, which may
	# result in unused variables in some places.
	#
	if [ "${enable_warnings}" = "yes" ]; then
		C_OPTION(-Wno-unused)
	fi
fi

# Enable UTF8 support by default.
if [ "${enable_utf8}" != "no" ]; then
	HDEFINE(UTF8, 1)
else
	HUNDEF(UTF8)
fi

# Disable astronomical units (constants are too large for some compilers).
# TODO test
HUNDEF(ASTRONOMICAL_UNITS)

# Enable conversion of historical units.
HDEFINE(HISTORICAL_UNITS, 1)

# Support 8/16/24/32bpp video displays by default.
# Disable unused modes to reduce code size and gain some cycles.
if [ "${enable_8bpp}" != "no" ]; then
	HDEFINE(VIEW_8BPP, 1)
else
	HUNDEF(VIEW_8BPP)
fi
if [ "${enable_16bpp}" != "no" ]; then
	HDEFINE(VIEW_16BPP, 1)
else
	HUNDEF(VIEW_16BPP)
fi
if [ "${enable_24bpp}" != "no" ]; then
	HDEFINE(VIEW_24BPP, 1)
else
	HUNDEF(VIEW_24BPP)
fi
if [ "${enable_32bpp}" != "no" ]; then
	HDEFINE(VIEW_32BPP, 1)
else
	HUNDEF(VIEW_32BPP)
fi

# Enable NLS if requested explicitely.
if [ "${enable_nls}" = "yes" ]; then
	CHECK(gettext)
	if [ "${HAVE_GETTEXT}" != "yes" ]; then
		echo "*"
		echo "* --enable-nls was given but gettext was not found. Try"
		echo "* running configure again without this option."
		echo "*"
		exit 1
	fi
fi