diff -up gnome-screensaver-2.29.90/configure.ac.linker-fixes gnome-screensaver-2.29.90/configure.ac
--- gnome-screensaver-2.29.90/configure.ac.linker-fixes	2010-02-08 10:50:19.000000000 -0500
+++ gnome-screensaver-2.29.90/configure.ac	2010-02-09 09:48:39.880808232 -0500
@@ -42,6 +42,7 @@ GLIB_REQUIRED_VERSION=2.15.0
 GCONF_REQUIRED_VERSION=2.6.1
 GDK_REQUIRED_VERSION=2.14.0
 GTK_REQUIRED_VERSION=2.11.5
+X11_REQUIRED_VERSION=1.3
 LIBGNOME_MENU_REQUIRED_VERSION=2.11.1
 GNOME_DESKTOP_REQUIRED_VERSION=2.29.0
 
@@ -56,6 +57,7 @@ AC_TYPE_UID_T
 
 AC_CHECK_FUNCS([setresuid setenv unsetenv clearenv])
 PKG_CHECK_MODULES(GNOME_SCREENSAVER,
+        x11 >= $X11_REQUIRED_VERSION
         gtk+-2.0 >= $GTK_REQUIRED_VERSION
         dbus-glib-1 >= $DBUS_REQUIRED_VERSION
         gconf-2.0 >= $GCONF_REQUIRED_VERSION
diff -up gnome-screensaver-2.29.90/savers/Makefile.am.linker-fixes gnome-screensaver-2.29.90/savers/Makefile.am
--- gnome-screensaver-2.29.90/savers/Makefile.am.linker-fixes	2010-02-09 10:14:46.863797660 -0500
+++ gnome-screensaver-2.29.90/savers/Makefile.am	2010-02-09 10:17:25.877811125 -0500
@@ -87,6 +87,7 @@ floaters_SOURCES =	\
 floaters_LDADD =		       \
 	libgs-theme-engine.a		\
 	$(GNOME_SCREENSAVER_SAVER_LIBS) \
+	-lm                             \
 	$(NULL)
 
 popsquares_SOURCES = 		\