+PKG_CHECK_MODULES(GLIB, glib-2.0 >= 2.14 gobject-2.0 gthread-2.0)
+PKG_CHECK_MODULES(CAIRO, cairo)
+PKG_CHECK_MODULES(GTK, gtk+-2.0 >= 2.16 gtkglext-1.0)
+PKG_CHECK_MODULES(SOUP, libsoup-2.4 >= 2.26)
+
+# Check for glut for example plugin
+AC_CHECK_LIB(glut, glutSolidTeapot, GLUT_LIBS="-lglut")
+AM_CONDITIONAL(HAVE_GLUT, test "$GLUT_LIBS" != "")
+AC_SUBST(GLUT_LIBS)