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dnl ----------------------------------------------------------------
dnl append git revision to the version number

dnl determine the git revision number
dnl note: the configure scripts needs to be regenerated to update the version number 
define([gitversion], esyscmd([sh -c "echo -n 'git'; git rev-parse --short HEAD | tr -d '\n'"]))

AC_INIT([osirion],[0.2.8-gitversion])

AC_CONFIG_HEADERS(src/config.h)

AC_LANG([C++])
AC_PROG_CXX
LT_INIT

AM_INIT_AUTOMAKE

dnl KDE_FIND_PATH(programm-name, variable-name, list of directories,
dnl     if-not-found, test-parameter)
AC_DEFUN([KDE_FIND_PATH],
[
   AC_MSG_CHECKING([for $1])
   if test -n "$$2"; then
        kde_cv_path="$$2";
   else
        kde_cache=`echo $1 | sed 'y%./+-%__p_%'`

        AC_CACHE_VAL(kde_cv_path_$kde_cache,
        [
        kde_cv_path="NONE"
        dirs="$3"
        kde_save_IFS=$IFS
        IFS=':'
        for dir in $PATH; do
          dirs="$dirs $dir"
        done
        IFS=$kde_save_IFS

        for dir in $dirs; do
          if test -x "$dir/$1"; then
            if test -n "$5"
            then
              evalstr="$dir/$1 $5 2>&1 "
              if eval $evalstr; then
                kde_cv_path="$dir/$1"
                break
              fi
            else
                kde_cv_path="$dir/$1"
                break
            fi
          fi
        done

        eval "kde_cv_path_$kde_cache=$kde_cv_path"

        ])

      eval "kde_cv_path=\"`echo '$kde_cv_path_'$kde_cache`\""

   fi

   if test -z "$kde_cv_path" || test "$kde_cv_path" = NONE; then
      AC_MSG_RESULT(not found)
      $4
   else
      AC_MSG_RESULT($kde_cv_path)
      $2=$kde_cv_path

   fi
])

dnl ----------------------------------------------------------------
dnl HOST dependend variables
dnl 

AC_MSG_CHECKING([host type])
case "$host" in
	*-apple-darwin*)
		HOST_LIBS=""
		HOST_GL_LIBS="-framework OpenGL"
		HOST_AL_LIBS="-framework OpenAL"
		ICON_CLIENT=""
		ICON_SERVER=""
		SDLMAIN="SDLMain.o"
		INSTALLTYPE="application bundle"
		OS=OSX
		AC_MSG_RESULT(OS X)
		AC_DEFINE_UNQUOTED(_OSX, 1, [Define this if you are building for native OS X])

dnl
dnl Do not rely on AC_PROG_OBJC presence (e.g. autoconf 2.59)
dnl http://www.mail-archive.com/xine-cvslog@lists.sourceforge.net/msg01693.html
dnl

		m4_ifdef(
			[AC_PROG_OBJC],
			[AC_PROG_OBJC],
			[AC_CHECK_TOOL([OBJC], [gcc])
			AC_SUBST(OBJC)
			AC_SUBST(OBJCFLAGS)]
		)
		;;

        *-*-mingw*)
		HOST_LIBS="-lws2_32"
		HOST_GL_LIBS="-lopengl32 -lglu32"
		HOST_AL_LIBS="-lopenal32"
		ICON_CLIENT="osirion-res.o"
		ICON_SERVER="osiriond-res.o"
		SDLMAIN=""
		INSTALLTYPE="single directory"
		OS=WIN32
                AC_MSG_RESULT(win32)
                ;;

        *)
                HOST_LIBS=""
                HOST_GL_LIBS="-lGL -lGLU"
		HOST_AL_LIBS="-lopenal"
		ICON_CLIENT=""
		ICON_SERVER=""
		SDLMAIN=""
		INSTALLTYPE="standard"
                AC_MSG_RESULT(generic unix)
		OS=UNIX
                ;;
esac

dnl
dnl Make Objective-C work with automake 1.7.x
dnl http://mlblog.osdir.com/sysutils.automake.general/2003-05/msg00030.shtml
dnl
AM_CONDITIONAL([am__fastdepOBJC], false)

AC_SUBST(OS)
AC_SUBST(HOST_LIBS)
AC_SUBST(ICON_CLIENT)
AC_SUBST(ICON_SERVER)
AC_SUBST(SDLMAIN)

AC_DEFINE(OS, $OS, [Operating System])

dnl ----------------------------------------------------------------
dnl enable compiler warnings or not
dnl

AC_MSG_CHECKING(whether to abort on compiler warnings)
WARN_CFLAGS="$WARN_CLFAGS -Wall"
AC_ARG_ENABLE(error,
        AS_HELP_STRING([--disable-error],[do not abort on compiler warnings]),
        AC_MSG_RESULT(no),
        AC_MSG_RESULT(yes)
        WARN_CFLAGS="$WARN_CFLAGS -Werror"
)
AC_SUBST(WARN_CFLAGS)

dnl ----------------------------------------------------------------
dnl enable DEBUG messages or not
dnl

AC_MSG_CHECKING(whether to include debug messages)
AC_ARG_ENABLE(debug_messages,
	AS_HELP_STRING([--disable-debug-messages],[build without extra debug messages]),
	AC_MSG_RESULT(no),
	AC_MSG_RESULT(yes)
	AC_DEFINE_UNQUOTED(HAVE_DEBUG_MESSAGES, 1, [Define this to enable debug messages])
)

dnl ----------------------------------------------------------------
dnl static libc
dnl

AC_ARG_ENABLE(static_stdlib,
	AS_HELP_STRING([--enable-static-stdlib],[staticly link with libgcc and libstdc++]),
	AC_MSG_RESULT(yes)
	STATIC_LDADD="-static-libgcc -static-libstdc++",
	AC_MSG_RESULT(no)
	STATIC_LDADD=""
)

AC_SUBST(STATIC_LDADD)

dnl ----------------------------------------------------------------
dnl curses
dnl

HAVE_CURSES=no

AC_ARG_WITH(curses,
        AS_HELP_STRING([--without-curses],[do not include curses support])
)

if test "x${with_curses}" != "xno"; then
        save_CPPFLAGS="$CPPFLAGS"
        CPPFLAGS="$CPPFLAGS $CURSES_CFLAGS"

	AC_CHECK_HEADER(curses.h,
		HAVE_CURSES="maybe",
		HAVE_CURSES="no"
	)

	if test "x${HAVE_CURSES}" = "xmaybe"; then
		AC_CHECK_LIB(ncurses, initscr,
			HAVE_CURSES="ncurses"
			AC_DEFINE(HAVE_CURSES, ncurses, [Define this if you have the curses library])
			CURSES_LIBS="-lncurses",
			HAVE_CURSES="maybe"
		)
	fi

	if test "x${HAVE_CURSES}" = "xmaybe"; then
		AC_CHECK_LIB(pdcurses, initscr,
			HAVE_CURSES="pdcurses"
			AC_DEFINE(HAVE_CURSES, pdcurses, [Define this if you have the curses library])
			CURSES_LIBS="-lpdcurses",
			HAVE_CURSES="maybe"
		)
	fi

	if test "x${HAVE_CURSES}" = "xmaybe"; then
		AC_CHECK_LIB(curses, initscr,
			HAVE_CURSES="curses"
			AC_DEFINE(HAVE_CURSES, curses, [Define this if you have the curses library])
			CURSES_LIBS="-lcurses",
			HAVE_CURSES="maybe"
		)
	fi


	if test "x${HAVE_CURSES}" = "xmaybe"; then
		HAVE_CURSES=no
	fi

	CPPFLAGS="$save_CPPFLAGS"
fi
AC_SUBST(CURSES_CFLAGS)
AC_SUBST(CURSES_LIBS)

dnl ----------------------------------------------------------------
dnl bullet
dnl

HAVE_BULLET=no

AC_ARG_ENABLE(static_bullet,
	AS_HELP_STRING([--enable-static-bullet],[staticly link with bullet physics libraries]),
	AC_MSG_RESULT(yes),
	AC_MSG_RESULT(no)
)

AC_ARG_WITH(bullet,
        AS_HELP_STRING([--with-bullet=PREFIX],[link with bullet physics library installed in PREFIX])
)

LDFLAGS_save="$LDFLAGS"
CPPFLAGS_save="$CPPFLAGS"

BULLET_DIR="/usr"
if test "x${with_bullet}" != "x"; then
	BULLET_DIR="${with_bullet}"
fi

CPPFLAGS="-I${BULLET_DIR}/include/bullet"

AC_CHECK_HEADER(btBulletDynamicsCommon.h,
	[],
	AC_MSG_ERROR([bullet physics library not found in ${BULLET_DIR}])
)

AC_MSG_CHECKING([if static linking of the bullet libraries is requested])
if test "x${enable_static_bullet}" = "xyes"; then
	BULLET_CPPFLAGS="-I${BULLET_DIR}/include/bullet"
	BULLET_LIBS="${BULLET_DIR}/lib/libBulletDynamics.a $BULLET_DIR/lib/libBulletCollision.a $BULLET_DIR/lib/libLinearMath.a"
	AC_MSG_RESULT([yes])
else
	BULLET_CPPFLAGS="-I${BULLET_DIR}/include/bullet"
	BULLET_LIBS="-lBulletDynamics -lBulletCollision -lLinearMath"
	AC_MSG_RESULT([no])
fi

CPPFLAGS="$CPPFLAGS_save $BULLET_CPPFLAGS"
LDFLAGS="$LDFLAGS_save $BULLET_LIBS"

CPPFLAGS="$CPPFLAGS_save"
LDFLAGS="$LDFLAGS_save"

AC_SUBST(BULLET_CPPFLAGS)
AC_SUBST(BULLET_LIBS)

dnl ----------------------------------------------------------------
dnl zlib
dnl

LIBS_save="$LIBS"
LDFLAGS_save="$LDFLAGS"

AC_CHECK_HEADER(zlib.h, 
	[],
	AC_MSG_ERROR([zlib.h not found])
)

AC_CHECK_LIB(z, compress,
	[],
	AC_MSG_ERROR([zlib not found])
)

LDFLAGS="$LDFLAGS_save"
LIBS="$LIBS_save"

LIBZ_LIBS="-lz"
AC_SUBST(LIBZ_LIBS)


dnl ----------------------------------------------------------------
dnl build client and server or dedicated server only
dnl
BUILD_CLIENT=no

AC_ARG_WITH(client,
	AS_HELP_STRING([--without-client],[do not build the client application])
)

AC_MSG_CHECKING(whether to build client)

if test "x${with_client}" = xno; then

	AC_MSG_RESULT(no)

else
	AC_MSG_RESULT(yes)

	LDFLAGS_save="$LDFLAGS"

	dnl ---------------------------------------------------------------
	dnl OpenGL
	dnl
	
	if test "x${OS}" = "xOSX"; then
		AC_CHECK_HEADER(OpenGL/gl.h,
			[],
			[AC_MSG_ERROR([OpenGL/gl.h not found])]
		)
		AC_CHECK_HEADER(OpenGL/glu.h,
			[],
			[AC_MSG_ERROR([OpenGL/glu.h not found])]
		)
	else
		AC_CHECK_HEADER(GL/gl.h,
			[],
			[AC_MSG_ERROR([GL/gl.h not found])]
		)
		AC_CHECK_HEADER(GL/glu.h,
			[],
			[AC_MSG_ERROR([GL/glu.h not found])]
		)
	fi
	
	LDFLAGS="$LDFLAGS_save"
	GL_LIBS="$HOST_GL_LIBS"
	AC_SUBST(GL_LIBS)
	AC_SUBST(GL_CFLAGS)

	dnl ---------------------------------------------------------------
	dnl OpenAL
	
	if test "x${OS}" = "xOSX"; then
		AC_CHECK_HEADER(OpenAL/al.h,
			[],
			[AC_MSG_ERROR([OpenAL/al.h not found])]
		)
	else
		AC_CHECK_HEADER(AL/al.h,
			[],
			[AC_MSG_ERROR([AL/al.h not found])]
		)
	fi
	
	LDFLAGS="$LDFLAGS_save"
	AL_LIBS="$HOST_AL_LIBS"
	AC_SUBST(AL_LIBS)
	AC_SUBST(AL_CFLAGS)
	
	dnl ---------------------------------------------------------------
	dnl libpng
	dnl
	
	LIBS_save="$LIBS"
	LIBS="$LIBZ_LIBS"

	AC_CHECK_HEADER(png.h, 
		[],
		[AC_MSG_ERROR([png.h not found])]
	)
	AC_CHECK_LIB(png, png_create_info_struct,
		HAVE_LIBPNG=yes,
		[AC_MSG_ERROR([libpng not found])]
	)
	
	LIBS="$LIBS_save"
	LIBPNG_LIBS="-lpng"
	AC_SUBST(LIBPNG_LIBS)

	dnl ---------------------------------------------------------------
	dnl libjpeg
	dnl
	
	AC_CHECK_HEADER(jpeglib.h,
			[],
			[AC_MSG_ERROR([jpeglib.h not found])]
	)
	AC_CHECK_LIB(jpeg, jpeg_start_decompress,
		HAVE_LIBJPEG=yes
		AC_DEFINE_UNQUOTED(HAVE_LIBJPEG, 1, [Define this if you have libjpeg]),
		AC_MSG_ERROR([libjpeg not found])
	)
	LIBJPG_LIBS="-ljpeg"
	AC_SUBST(LIBJPG_LIBS)

	dnl ---------------------------------------------------------------
	dnl Ogg Vorbis
	dnl

	LIBS_save="$LIBS"
	LIBS="$LIBS -lvorbis -logg"

	AC_CHECK_HEADER(vorbis/vorbisfile.h,
			[],
			[AC_MSG_ERROR([vorbis/vorbisfile.h not found])]
	)
	AC_CHECK_HEADER(vorbis/codec.h,
			[],
			[AC_MSG_ERROR([vorbis/codec.h not found])]
	)

	AC_CHECK_LIB(vorbisfile, ov_fopen,
		HAVE_VORBISFILE=yes
		AC_DEFINE_UNQUOTED(HAVE_VORBISFILE, 1, [Define this if you have libvorbisfile]),
		AC_MSG_ERROR([libvorbisfile not found])
	)
	
	LIBS="$LIBS_SAVE"
	LIBVORBISFILE_LIBS="-lvorbisfile -lvorbis -logg"
	AC_SUBST(LIBVORBISFILE_LIBS)

	dnl ---------------------------------------------------------------
	dnl SDL2
	dnl

	AC_MSG_CHECKING([looking for SDL2])
	KDE_FIND_PATH(sdl2-config, LIBSDL2_CONFIG, [${prefix}/bin ${exec_prefix}/bin /usr/local/bin /opt/local/bin], [
			AC_MSG_ERROR([SDL2 not found])
	])
		
	if test -n "$LIBSDL2_CONFIG"; then
		LIBSDL2_LIBS="`$LIBSDL2_CONFIG --libs`"
		LIBSDL2_RPATH=
		for args in $LIBSDL2_LIBS; do
		case $args in
			-L*)
			LIBSDL2_RPATH="$LIBSDL2_RPATH $args"
			;;
		esac
		done
		
		LIBSDL2_RPATH=`echo $LIBSDL2_RPATH | sed -e "s/-L/-R/g"`
		LIBSDL2_CFLAGS="`$LIBSDL2_CONFIG --cflags`"
	fi
		
	AC_MSG_RESULT($HAVE_LIBSDL)
		
	AC_SUBST(LIBSDL2_LIBS)
	AC_SUBST(LIBSDL2_CFLAGS)
	AC_SUBST(LIBSDL2_RPATH)

	BUILD_CLIENT=yes
	AC_DEFINE_UNQUOTED(BUILD_CLIENT, 1, [Define this to build the client])
fi

CXXFLAGS="-pipe $DEBUG_CFLAGS $WARN_CFLAGS $CXXFLAGS"
AC_SUBST(CXXFLAGS)

CPPFLAGS="$CPPFLAGS $BULLET_CPPFLAGS"
AC_SUBST(CPPFLAGS)

dnl ---------------------------------------------------------------
dnl   Installation paths

AC_MSG_CHECKING(installation type)
AC_ARG_ENABLE(single_directory,
        AS_HELP_STRING([--enable-single-directory],[install everything in a single directory]),
        AC_MSG_RESULT(single directory)
	INSTALLTYPE="single directory",
        AC_MSG_RESULT(standard)
	INSTALLTYPE="standard"
)

if test "x${INSTALLTYPE}" = xstandard; then
	test "$prefix" = "NONE" && prefix="/usr/local"
	bindir="$prefix/bin"
	pkgdatadir="$prefix/share/${PACKAGE}"
	docdir="$pkgdatadir/doc"
else
	test "$prefix" = "NONE" && prefix="/opt/games/$PACKAGE"
	bindir="$prefix"
	pkgdatadir="$prefix"
	docdir="$prefix/doc"
fi

PACKAGE_DATADIR="$pkgdatadir/data"

AC_DEFINE(PACKAGE_DATADIR, "$PACKAGE_DATADIR",
	[Define this to the path containing the game data.]
)

dnl ---------------------------------------------------------------
dnl    Write makefiles and config.h

AM_CONDITIONAL(BUILD_CLIENT, test "x$BUILD_CLIENT" = xyes)
AM_CONDITIONAL(BUILD_DEDICATED, test "x$BUILD_CLIENT" = xno)

AC_CONFIG_FILES([src/auxiliary/Makefile src/math/Makefile src/sys/Makefile src/filesystem/Makefile src/model/Makefile src/core/Makefile src/dedicated/Makefile src/audio/Makefile src/render/Makefile src/ui/Makefile src/client/Makefile src/game/base/Makefile src/game/example/Makefile src/game/intro/Makefile src/game/Makefile src/Makefile Makefile])

AC_OUTPUT

dnl ---------------------------------------------------------------
dnl   Configuration summary

AC_MSG_RESULT([
Project::OSiRiON $VERSION

Configuration summary:

platform ........... $host
flags .............. $CPPFLAGS $CXXFLAGS
libraries .......... $HOST_LIBS $LIBJPG_LIBS $LIBPNG_LIBS $LIBZ_LIBS $CURSES_LIBS $STATIC_LDADD
bullet ............. $BULLET_LIBS
curses ............. $HAVE_CURSES
build client ....... $BUILD_CLIENT])

if test "x$BUILD_CLIENT" = xyes; then
AC_MSG_RESULT([SDL2 ............... $LIBSDL2_LIBS
opengl ............. $GL_LIBS
openal ............. $AL_LIBS]
vorbisfile ......... $LIBVORBISFILE_LIBS)
fi

AC_MSG_RESULT([
Installation directories:

installation type .. $INSTALLTYPE
prefix ............. $prefix
binaries ........... $bindir
documentation ...... $docdir
game data .......... $PACKAGE_DATADIR
])