diff -Naur glib-2.34.1.orig/configure glib-2.34.1/configure
--- glib-2.34.1.orig/configure	2012-10-28 17:44:08.315638699 -0400
+++ glib-2.34.1/configure	2012-10-28 17:45:21.155638814 -0400
@@ -27268,7 +27268,7 @@
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ! ac_fn_c_try_compile "$LINENO"; then :
   as_fn_error $? "GLib must be build with -march=i486 or later." "$LINENO" 5
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext