mutter/configure.in

AC_PREREQ(2.50)

m4_define([mutter_major_version], [2])
m4_define([mutter_minor_version], [91])
m4_define([mutter_micro_version], [0])

m4_define([mutter_version],
          [mutter_major_version.mutter_minor_version.mutter_micro_version])

m4_define([mutter_plugin_api_version], [3])

AC_INIT([mutter], [mutter_version],
        [http://bugzilla.gnome.org/enter_bug.cgi?product=mutter])

AC_CONFIG_SRCDIR(src/core/display.c)
AC_CONFIG_HEADERS(config.h)

AM_INIT_AUTOMAKE([dist-bzip2 no-dist-gzip])
m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])],)
AM_MAINTAINER_MODE

MUTTER_MAJOR_VERSION=mutter_major_version
MUTTER_MINOR_VERSION=mutter_minor_version
MUTTER_MICRO_VERSION=mutter_micro_version
MUTTER_PLUGIN_API_VERSION=mutter_plugin_api_version
AC_SUBST(MUTTER_MAJOR_VERSION)
AC_SUBST(MUTTER_MINOR_VERSION)
AC_SUBST(MUTTER_MICRO_VERSION)
AC_SUBST(MUTTER_PLUGIN_API_VERSION)

MUTTER_PLUGIN_DIR="$libdir/$PACKAGE/plugins"
AC_SUBST(MUTTER_PLUGIN_DIR)

# Honor aclocal flags
AC_SUBST(ACLOCAL_AMFLAGS, "\${ACLOCAL_FLAGS}")

GETTEXT_PACKAGE=mutter
AC_SUBST(GETTEXT_PACKAGE)
AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE,"$GETTEXT_PACKAGE",[Name of default gettext domain])

IT_PROG_INTLTOOL([0.34.90])
AC_PROG_CC
AC_ISC_POSIX
AC_HEADER_STDC
AC_LIBTOOL_WIN32_DLL
AM_PROG_LIBTOOL

# Sets GLIB_GENMARSHAL and GLIB_MKENUMS
AM_PATH_GLIB_2_0()

#### Integer sizes

AC_CHECK_SIZEOF(char)
AC_CHECK_SIZEOF(short)
AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(void *)
AC_CHECK_SIZEOF(long long)
AC_CHECK_SIZEOF(__int64)

## byte order
AC_C_BIGENDIAN

#### Warnings

# Stay command-line compatible with the gnome-common configure option. Here
# minimum/yes/maximum are the same, however.
AC_ARG_ENABLE(compile_warnings,
  AS_HELP_STRING([--enable-compile-warnings=@<:@no/minimum/yes/maximum/error@:>@],[Turn on compiler warnings]),,
  enable_compile_warnings=error)

changequote(,)dnl
if test "$enable_compile_warnings" != no ; then
  if test "x$GCC" = "xyes"; then
    case " $CFLAGS " in
    *[\ \	]-Wall[\ \	]*) ;;
    *) CFLAGS="$CFLAGS -Wall" ;;
    esac

#   case " $CFLAGS " in
#   *[\ \	]-Wshadow[\ \	]*) ;;
#   *) CFLAGS="$CFLAGS -Wshadow" ;;
#   esac

    case " $CFLAGS " in
    *[\ \	]-Wchar-subscripts[\ \	]*) ;;
    *) CFLAGS="$CFLAGS -Wchar-subscripts" ;;
    esac

    case " $CFLAGS " in
    *[\ \	]-Wmissing-declarations[\ \	]*) ;;
    *) CFLAGS="$CFLAGS -Wmissing-declarations" ;;
    esac

    case " $CFLAGS " in
    *[\ \	]-Wmissing-prototypes[\ \	]*) ;;
    *) CFLAGS="$CFLAGS -Wmissing-prototypes" ;;
    esac

    case " $CFLAGS " in
    *[\ \	]-Wnested-externs[\ \	]*) ;;
    *) CFLAGS="$CFLAGS -Wnested-externs" ;;
    esac

    case " $CFLAGS " in
    *[\ \	]-Wpointer-arith[\ \	]*) ;;
    *) CFLAGS="$CFLAGS -Wpointer-arith" ;;
    esac

    case " $CFLAGS " in
    *[\ \	]-Wcast-align[\ \	]*) ;;
    *) CFLAGS="$CFLAGS -Wcast-align" ;;
    esac

    case " $CFLAGS " in
    *[\ \	]-Wsign-compare[\ \	]*) ;;
    *) CFLAGS="$CFLAGS -Wsign-compare" ;;
    esac

    if test "$enable_compile_warnings" = error; then
      case " $CFLAGS " in
      *[\ \	]-Werror[\ \	]*) ;;
      *) CFLAGS="$CFLAGS -Werror" ;;
      esac
    fi
  fi
fi
changequote([,])dnl

AC_MSG_CHECKING([which gtk+ version to compile against])
AC_ARG_WITH([gtk],
  AC_HELP_STRING([--with-gtk=3.0|2.0],
                 [which gtk+ version to compile against (default: 3.0)]),
  [case "$with_gtk" in
      2.0|3.0) ;;
      *) AC_MSG_ERROR([invalid gtk+ version specified]);;
  esac],
  [with_gtk=3.0])
AC_MSG_RESULT([$with_gtk])

case "$with_gtk" in
  2.0) GTK_API_VERSION=2.0
       GTK_MIN_VERSION=2.18
       CANBERRA_GTK=libcanberra-gtk
       CANBERRA_GTK_VERSION=0.24
       ;;
  3.0) GTK_API_VERSION=3.0
       GTK_MIN_VERSION=2.90.7
       CANBERRA_GTK=libcanberra-gtk3
       CANBERRA_GTK_VERSION=0.26
       AC_DEFINE(USE_CAIRO_REGION, 1, [Use cairo_region_t instead of GdkRegion])
       ;;
esac

AM_CONDITIONAL(INSTALL_LIBMUTTER_PRIVATE, test "$with_gtk" = "3.0")

MUTTER_PC_MODULES="gtk+-$GTK_API_VERSION >= $GTK_MIN_VERSION pango >= 1.2.0"
AC_SUBST(GTK_API_VERSION)

AC_ARG_ENABLE(gconf,
  AC_HELP_STRING([--disable-gconf],
                 [disable gconf usage, for embedded/size-sensitive non-GNOME builds]),,
  enable_gconf=yes)

if test x$enable_gconf = xyes; then
    AC_DEFINE(HAVE_GCONF,1,[Build with gconf support])
    MUTTER_PC_MODULES="$MUTTER_PC_MODULES gconf-2.0 >= 1.2.0"
fi

AC_ARG_ENABLE(verbose-mode,
  AC_HELP_STRING([--disable-verbose-mode],
                 [disable mutter's ability to do verbose logging, for embedded/size-sensitive custom builds]),,
  enable_verbose_mode=yes)

if test x$enable_verbose_mode = xyes; then
    AC_DEFINE(WITH_VERBOSE_MODE,1,[Build with verbose mode support])
fi

AC_ARG_ENABLE(sm,
  AC_HELP_STRING([--disable-sm],
                 [disable mutter's session management support, for embedded/size-sensitive custom non-GNOME builds]),,
  enable_sm=auto)

AC_ARG_ENABLE(startup-notification,
  AC_HELP_STRING([--disable-startup-notification],
                 [disable mutter's startup notification support, for embedded/size-sensitive custom non-GNOME builds]),,
  enable_startup_notification=auto)

AC_ARG_WITH(introspection,
  AC_HELP_STRING([--without-introspection],
                 [disable the use of GObject introspection]),,
  with_introspection=auto)

AC_ARG_WITH(libcanberra,
  AC_HELP_STRING([--without-libcanberra],
                 [disable the use of libcanberra for playing sounds]),,
  with_libcanberra=auto)

AC_ARG_ENABLE(xsync,
  AC_HELP_STRING([--disable-xsync],
                 [disable mutter's use of the XSync extension]),,
  enable_xsync=auto)

AC_ARG_ENABLE(shape,
  AC_HELP_STRING([--disable-shape],
                 [disable mutter's use of the shaped window extension]),,
  enable_shape=auto)

## try definining HAVE_BACKTRACE
AC_CHECK_HEADERS(execinfo.h, [AC_CHECK_FUNCS(backtrace)])

AM_GLIB_GNU_GETTEXT

## here we get the flags we'll actually use
# GRegex requires Glib-2.14.0
PKG_CHECK_MODULES(ALL, glib-2.0 >= 2.14.0)
# gtk_window_set_icon_name requires gtk2+-2.6.0
PKG_CHECK_MODULES(MUTTER_MESSAGE, gtk+-$GTK_API_VERSION >= $GTK_MIN_VERSION)
PKG_CHECK_MODULES(MUTTER_WINDOW_DEMO, gtk+-$GTK_API_VERSION >= $GTK_MIN_VERSION)

# Unconditionally use this dir to avoid a circular dep with gnomecc
GNOME_KEYBINDINGS_KEYSDIR="${datadir}/gnome-control-center/keybindings"
AC_SUBST(GNOME_KEYBINDINGS_KEYSDIR)

STARTUP_NOTIFICATION_VERSION=0.7
AC_MSG_CHECKING([Startup notification library >= $STARTUP_NOTIFICATION_VERSION])
if $PKG_CONFIG --atleast-version $STARTUP_NOTIFICATION_VERSION libstartup-notification-1.0; then
   have_startup_notification=yes
else
   have_startup_notification=no
fi
AC_MSG_RESULT($have_startup_notification)

if test x$enable_startup_notification = xyes; then
   have_startup_notification=yes
   echo "startup-notification support forced on"
elif test x$enable_startup_notification = xauto; then
   true
else
   have_startup_notification=no
fi

if test x$have_startup_notification = xyes; then
  echo "Building with libstartup-notification"
  MUTTER_PC_MODULES="$MUTTER_PC_MODULES libstartup-notification-1.0 >= $STARTUP_NOTIFICATION_VERSION"
  AC_DEFINE(HAVE_STARTUP_NOTIFICATION, , [Building with startup notification support])
else
  echo "Building without libstartup-notification"
fi

have_libcanberra=no
AC_MSG_CHECKING([libcanberra-gtk])
if test x$with_libcanberra = xno ; then
  AC_MSG_RESULT([disabled])
else
  if $PKG_CONFIG --exists $CANBERRA_GTK '>=' $CANBERRA_GTK_VERSION; then
    have_libcanberra=yes
    AC_MSG_RESULT(yes)
    MUTTER_PC_MODULES="$MUTTER_PC_MODULES $CANBERRA_GTK"
    AC_DEFINE([HAVE_LIBCANBERRA], 1, [Building with libcanberra for playing sounds])
  else
    AC_MSG_RESULT(no)
    if test x$with_libcanberra = xyes ; then
      AC_MSG_ERROR([libcanberra forced and libcanberra-gtk was not found])
    fi
  fi
fi

XCOMPOSITE_VERSION=0.2

AC_MSG_CHECKING([Xcomposite >= $XCOMPOSITE_VERSION])
if $PKG_CONFIG --atleast-version $XCOMPOSITE_VERSION xcomposite; then
  MUTTER_PC_MODULES="$MUTTER_PC_MODULES xcomposite >= $XCOMPOSITE_VERSION xfixes xrender xdamage"
  AC_DEFINE(HAVE_COMPOSITE_EXTENSIONS, 1, [Building with compositing manager support])
  echo "Building with compositing manager"

  ## force on render also
  have_xrender=yes
else
  AC_MSG_ERROR([no. Mutter requires the Xcomposite extension to build.])
fi

CLUTTER_VERSION=1.2.0
CLUTTER_PACKAGE=clutter-1.0
AC_SUBST(CLUTTER_PACKAGE)
if $PKG_CONFIG --atleast-version $CLUTTER_VERSION $CLUTTER_PACKAGE ; then
  MUTTER_PC_MODULES="$MUTTER_PC_MODULES $CLUTTER_PACKAGE "
  PKG_CHECK_MODULES(CLUTTER, $CLUTTER_PACKAGE)
  AC_DEFINE(WITH_CLUTTER, , [Building with Clutter compositor])

  dnl Check for the clutter-glx-texture-pixmap header
  mutter_save_cppflags="$CPPFLAGS"
  CPPFLAGS="$CPPFLAGS $CLUTTER_CFLAGS"
  AC_CHECK_HEADER([clutter/glx/clutter-glx-texture-pixmap.h],
                  [have_glx_texture_pixmap=yes],
                  [have_glx_texture_pixmap=no])
  CPPFLAGS="$mutter_save_cppflags"

  if test x$have_glx_texture_pixmap = xyes; then
    AC_DEFINE(HAVE_GLX_TEXTURE_PIXMAP, ,
              [Is ClutterGLXTexturePixmap available?])
  fi
else
  AC_MSG_ERROR([no. Mutter requires Clutter version $CLUTTER_VERSION.])
fi

if test x$with_introspection != xno; then
  PKG_CHECK_MODULES(INTROSPECTION, gobject-introspection-1.0 >= 0.9.5, have_introspection=yes, have_introspection=no)
  if test x$have_introspection=xyes; then
    MUTTER_PC_MODULES="$MUTTER_PC_MODULES gobject-introspection-1.0"
    AC_DEFINE(HAVE_INTROSPECTION, 1, [Define if GObject introspection is available])
    G_IR_SCANNER=`$PKG_CONFIG --variable=g_ir_scanner gobject-introspection-1.0`
    AC_SUBST(G_IR_SCANNER)
    G_IR_COMPILER=`$PKG_CONFIG --variable=g_ir_compiler gobject-introspection-1.0`
    AC_SUBST(G_IR_COMPILER)
    G_IR_GENERATE=`$PKG_CONFIG --variable=g_ir_generate gobject-introspection-1.0`
    AC_SUBST(G_IR_GENERATE)
    GIRDIR=`$PKG_CONFIG --variable=girdir gobject-introspection-1.0`
    AC_SUBST(GIRDIR)
    TYPELIBDIR="$($PKG_CONFIG --variable=typelibdir gobject-introspection-1.0)"
    AC_SUBST(TYPELIBDIR)
  fi
fi
AM_CONDITIONAL(WITH_INTROSPECTION, test "$have_introspection" = "yes")

AC_MSG_CHECKING([Xcursor])
if $PKG_CONFIG xcursor; then
     have_xcursor=yes
  else
     have_xcursor=no
  fi
  AC_MSG_RESULT($have_xcursor)

if test x$have_xcursor = xyes; then
  echo "Building with Xcursor"
  MUTTER_PC_MODULES="$MUTTER_PC_MODULES xcursor"
  AC_DEFINE(HAVE_XCURSOR, , [Building with Xcursor support])
fi

PKG_CHECK_MODULES(MUTTER, $MUTTER_PC_MODULES)

AC_PATH_XTRA

ALL_X_LIBS="$X_LIBS $X_PRE_LIBS -lX11 $X_EXTRA_LIBS"

# Check for Xinerama extension (Solaris impl or Xfree impl)
mutter_save_cppflags="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS $X_CFLAGS"

AC_ARG_ENABLE(xinerama,
  AC_HELP_STRING([--disable-xinerama],
                 [disable mutter's use of the Xinerama extension]),
  try_xinerama=$enable_xinerama,try_xinerama=yes)

use_solaris_xinerama=no
use_xfree_xinerama=no
if test "${try_xinerama}" != no; then
    case "$host" in
        *-*-solaris*)
            # Check for solaris
            use_solaris_xinerama=yes
            AC_CHECK_LIB(Xext, XineramaGetInfo,
                         use_solaris_xinerama=yes, use_solaris_xinerama=no,
                         $ALL_X_LIBS)
            if test "x$use_solaris_xinerama" = "xyes"; then
                AC_CHECK_HEADER(X11/extensions/xinerama.h,
                                if test -z "`echo $ALL_X_LIBS | grep "\-lXext" 2> /dev/null`"; then
                                    X_EXTRA_LIBS="-lXext $X_EXTRA_LIBS"
                                fi
                                AC_DEFINE(HAVE_SOLARIS_XINERAMA, , [Have Solaris-style Xinerama])
                                AC_DEFINE(HAVE_XINERAMA, , [Have some version of Xinerama]),
                                use_solaris_xinerama=no,
                                [#include <X11/Xlib.h>])
            fi
            AC_MSG_CHECKING(for Xinerama support on Solaris)
            AC_MSG_RESULT($use_solaris_xinerama);
            ;;
        *)
            # Check for XFree
            use_xfree_xinerama=yes
            AC_CHECK_LIB(Xinerama, XineramaQueryExtension,
                [AC_CHECK_HEADER(X11/extensions/Xinerama.h,
                                 X_EXTRA_LIBS="-lXinerama $X_EXTRA_LIBS"
                                 if test -z "`echo $ALL_X_LIBS | grep "\-lXext" 2> /dev/null`"; then
                                     X_EXTRA_LIBS="-lXext $X_EXTRA_LIBS"
                                 fi
                                 AC_DEFINE(HAVE_XFREE_XINERAMA, , [Have XFree86-style Xinerama])
                                 AC_DEFINE(HAVE_XINERAMA,, [Have some version of Xinerama]),
                                 use_xfree_xinerama=no,
                                 [#include <X11/Xlib.h>])],
                use_xfree_xinerama=no, -lXext $ALL_X_LIBS)
            AC_MSG_CHECKING(for Xinerama support on XFree86)
            AC_MSG_RESULT($use_xfree_xinerama);
            ;;
    esac
fi

CPPFLAGS="$mutter_save_cppflags"

SHAPE_LIBS=
found_shape=no
AC_CHECK_LIB(Xext, XShapeQueryExtension,
               [AC_CHECK_HEADER(X11/extensions/shape.h,
                                SHAPE_LIBS=-lXext found_shape=yes)],
               , $ALL_X_LIBS)

if test x$enable_shape = xno; then
   found_shape=no
fi

if test x$enable_shape = xyes; then
   if test "$found_shape" = "no"; then
      AC_MSG_ERROR([--enable-shape forced and Shape not found])
      exit 1
   fi
fi

if test "x$found_shape" = "xyes"; then
   AC_DEFINE(HAVE_SHAPE, , [Have the shape extension library])
fi

found_xkb=no
AC_CHECK_LIB(X11, XkbQueryExtension,
               [AC_CHECK_HEADER(X11/XKBlib.h,
                                found_xkb=yes)],
	, $ALL_X_LIBS)

if test "x$found_xkb" = "xyes"; then
   AC_DEFINE(HAVE_XKB, , [Have keyboard extension library])
fi


RANDR_LIBS=
found_randr=no
AC_CHECK_LIB(Xrandr, XRRUpdateConfiguration,
               [AC_CHECK_HEADER(X11/extensions/Xrandr.h,
                                RANDR_LIBS=-lXrandr found_randr=yes,,
				[#include <X11/Xlib.h>])],
               , -lXrender -lXext $ALL_X_LIBS)

if test "x$found_randr" = "xyes"; then
   AC_DEFINE(HAVE_RANDR, , [Have the Xrandr extension library])
fi

XSYNC_LIBS=
found_xsync=no
AC_CHECK_LIB(Xext, XSyncQueryExtension,
               [AC_CHECK_HEADER(X11/extensions/sync.h,
                                found_xsync=yes,,
				[#include <X11/Xlib.h>])],
               , $ALL_X_LIBS)

if test x$enable_xsync = xno; then
   found_xsync=no
fi

if test x$enable_xsync = xyes; then
   if test "$found_xsync" = "no"; then
      AC_MSG_ERROR([--enable-xsync forced and XSync not found])
      exit 1
   fi
fi

if test "x$found_xsync" = "xyes"; then
   XSYNC_LIBS=-lXext
   AC_DEFINE(HAVE_XSYNC, , [Have the Xsync extension library])
fi

MUTTER_LIBS="$MUTTER_LIBS $XSYNC_LIBS $RANDR_LIBS $SHAPE_LIBS $X_LIBS $X_PRE_LIBS -lX11 $X_EXTRA_LIBS -lm"
MUTTER_MESSAGE_LIBS="$MUTTER_MESSAGE_LIBS $X_LIBS $X_PRE_LIBS -lX11 $X_EXTRA_LIBS"
MUTTER_WINDOW_DEMO_LIBS="$MUTTER_WINDOW_DEMO_LIBS $X_LIBS $X_PRE_LIBS -lX11 $X_EXTRA_LIBS -lm"
MUTTER_PROPS_LIBS="$MUTTER_PROPS_LIBS $X_LIBS $X_PRE_LIBS -lX11 $X_EXTRA_LIBS"

found_sm=no
case "$MUTTER_LIBS" in
 *-lSM*)
    found_sm=yes
    ;;
 *)
  AC_CHECK_LIB(SM, SmcSaveYourselfDone,
               [AC_CHECK_HEADERS(X11/SM/SMlib.h,
                                MUTTER_LIBS="-lSM -lICE $MUTTER_LIBS" found_sm=yes)],
               , $MUTTER_LIBS)
    ;;
esac

if test x$enable_sm = xno; then
   found_sm=no
fi

if test x$enable_sm = xyes; then
   if test "$found_sm" = "no"; then
      AC_MSG_ERROR([--enable-sm forced and -lSM not found])
      exit 1
   fi
fi

if test "$found_sm" = "yes"; then
   AC_DEFINE(HAVE_SM, , [Building with SM support])
fi

AM_CONDITIONAL(HAVE_SM, test "$found_sm" = "yes")

HOST_ALIAS=$host_alias
AC_SUBST(HOST_ALIAS)

AC_PATH_PROG(GDK_PIXBUF_CSOURCE, gdk-pixbuf-csource, no)

if test x"$GDK_PIXBUF_CSOURCE" = xno; then
  AC_MSG_ERROR([gdk-pixbuf-csource executable not found in your path - should be installed with GTK])
fi

AC_SUBST(GDK_PIXBUF_CSOURCE)

if test x$enable_gconf = xyes; then
   AC_PATH_PROG(GCONFTOOL, gconftool-2, no)
   if test x"$GCONFTOOL" = xno; then
     AC_MSG_ERROR([gconftool-2 executable not found in your path - should be installed with GConf])
   fi

   AM_GCONF_SOURCE_2
else
  GCONF_SCHEMAS_INSTALL_TRUE='#'
  GCONF_SCHEMAS_INSTALL_FALSE=
fi

AC_PATH_PROG(ZENITY, zenity, no)
if test x"$ZENITY" = xno; then
  AC_MSG_ERROR([zenity not found in your path - needed for dialogs])
fi

AC_ARG_ENABLE(debug,
	[  --enable-debug		enable debugging],,
	enable_debug=no)
if test "x$enable_debug" = "xyes"; then
	CFLAGS="$CFLAGS -g -O"
fi

# For fix-meta-rectangle.py
AM_PATH_PYTHON([2.5])

# Use gnome-doc-utils:
GNOME_DOC_INIT([0.8.0])

AC_CONFIG_FILES([
Makefile
doc/Makefile
doc/man/Makefile
src/Makefile
src/wm-tester/Makefile
src/libmutter-private.pc
src/mutter-plugins.pc
src/tools/Makefile
src/compositor/plugins/Makefile
po/Makefile.in
])

AC_OUTPUT

if test x$enable_gconf = xno; then
        echo "*** WARNING WARNING WARNING WARNING WARNING"
        echo "*** Building without GConf.  This means there's no"
        echo "*** way to change prefs except hacking source code."
        echo "*** This is intended for embedded systems etc., not for normal use."
fi

if test x$enable_verbose_mode = xno; then
        echo "*** WARNING WARNING WARNING WARNING WARNING"
        echo "*** Building without verbose mode"
        echo "*** This means there's no way to debug mutter problems."
        echo "*** Please build normal desktop versions of mutter"
        echo "*** with verbose mode enabled so users can use it when they report bugs."
fi

dnl ==========================================================================
echo "
mutter-$VERSION (using gtk+-${GTK_API_VERSION}):

	prefix:                   ${prefix}
	source code location:	  ${srcdir}
	compiler:		  ${CC}

	GConf:                    ${enable_gconf}
	XFree86 Xinerama:         ${use_xfree_xinerama}
	Solaris Xinerama:         ${use_solaris_xinerama}
	Startup notification:     ${have_startup_notification}
	libcanberra:              ${have_libcanberra}
	Introspection:            ${have_introspection}
	Session management:       ${found_sm}
	Shape extension:          ${found_shape}
	Xsync:                    ${found_xsync}
	Xcursor:                  ${have_xcursor}
"


MUTTER_MINOR_VERSION=mutter_minor_version
if expr $MUTTER_MINOR_VERSION % 2 > /dev/null ; then
   stable_version=`expr $MUTTER_MINOR_VERSION - 1`
   echo "This is the UNSTABLE branch of mutter"
   echo -n "Use 2.$stable_version.x for stable "
   echo    "(gnome-2-$stable_version branch in Subversion)"
else
   echo "This is the stable branch of mutter"
fi