[gnome-power-manager] Allow compiling --with-gtk=2.0

[Richard Hughes <rhughes src gnome org>]

commit ce47870692c57d567c4123c5617528499c9339e3
Author: Richard Hughes <richard hughsie com>
Date:   Fri Aug 6 18:02:27 2010 +0100

    Allow compiling --with-gtk=2.0

 configure.ac |   47 ++++++++++++++++++++++++++++++++++-------------
 1 files changed, 34 insertions(+), 13 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 2a6b32f..655d5ab 100644
--- a/configure.ac
+++ b/configure.ac
@@ -33,7 +33,6 @@ CPPFLAGS="$CPPFLAGS -DGSEAL_ENABLE"
 dnl ---------------------------------------------------------------------------
 dnl - Use strict options (default enabled for devs, disabled in releases)
 dnl ---------------------------------------------------------------------------
-dnl if .git directory is present, considering we are working in the repository
 if test -d ".git"; then
 	default_strict=yes
 else
@@ -110,23 +109,45 @@ dnl - Check library dependencies
 dnl ---------------------------------------------------------------------------
 PKG_CHECK_MODULES(GLIB, glib-2.0 >= 2.13.0 gobject-2.0 gio-2.0 >= 2.25.9)
 
-PKG_CHECK_MODULES(CANBERRA, libcanberra-gtk3 >= 0.10)
+dnl **** We can compile against GTK2 or GTK3 ****
+AC_MSG_CHECKING([which gtk+ version to compile against])
+AC_ARG_WITH([gtk],
+  [AS_HELP_STRING([--with-gtk=2.0|3.0],[which gtk+ version to compile against (default: 3.0)])],
+  [case "$with_gtk" in
+     2.0|3.0) ;;
+     *) AC_MSG_ERROR([invalid gtk version specified]) ;;
+   esac],
+  [with_gtk=2.0])
+AC_MSG_RESULT([$with_gtk])
+
+case "$with_gtk" in
+2.0)
+	PKG_CHECK_MODULES(GNOME, [
+	 gconf-2.0 >= 2.31.1
+	 gnome-keyring-1 >= 0.6.0
+	 cairo >= 1.0.0
+	 gtk+-2.0 >= 2.21.5
+	 gdk-x11-2.0])
+	PKG_CHECK_MODULES(NOTIFY, libnotify >= 0.4.0, has_libnotify=yes, has_libnotify=no)
+	PKG_CHECK_MODULES(CANBERRA, libcanberra-gtk >= 0.10)
+	;;
+3.0)
+	PKG_CHECK_MODULES(GNOME, [
+	 gconf-2.0 >= 2.31.1
+	 gnome-keyring-1 >= 0.6.0
+	 cairo >= 1.0.0
+	 gtk+-3.0 >= 2.90.3
+	 gdk-x11-3.0])
+	PKG_CHECK_MODULES(NOTIFY, libnotify >= 0.5.0, has_libnotify=yes, has_libnotify=no)
+	PKG_CHECK_MODULES(CANBERRA, libcanberra-gtk3 >= 0.10)
+       ;;
+esac
 
 PKG_CHECK_MODULES(DBUS,[
  dbus-glib-1 >= 0.70
  dbus-1 >= 1.0
  gthread-2.0])
 
-PKG_CHECK_MODULES(GNOME, [
- gtk+-3.0 >= 2.90.3
- gconf-2.0 >= 2.31.1
- gnome-keyring-1 >= 0.6.0
- cairo >= 1.0.0])
-
-PKG_CHECK_MODULES(GDK, [
- gdk-3.0 >= 2.90.3
- gdk-x11-3.0])
-
 PKG_CHECK_MODULES(X11, [
  xrandr >= 1.2.0
  xrender x11 xext xproto])
@@ -140,7 +161,6 @@ PKG_CHECK_EXISTS(
 PKG_CHECK_MODULES(UPOWER, upower-glib >= 0.9.1)
 
 dnl **** Check for NOTIFY ****
-PKG_CHECK_MODULES(NOTIFY, libnotify >= 0.5.0, has_libnotify=yes, has_libnotify=no)
 AM_CONDITIONAL(HAVE_NOTIFY, test x$libnotify = xyes)
 if test x$has_libnotify = xyes; then
 	AC_DEFINE(HAVE_NOTIFY,1,[Use session notifications])
@@ -329,6 +349,7 @@ echo "
         datadir:                   ${datadir}
         compiler:                  ${CC}
         cflags:                    ${CFLAGS}
+        GTK version:               ${with_gtk}
         Building extra applets:    ${enable_applets}
         Self test support:         ${have_tests}
         Docbook support:           ${enable_docbook_docs}