diff -ru pkg-config-0.25.orig/pkg.m4 pkg-config-0.25/pkg.m4
--- pkg-config-0.25.orig/pkg.m4	2009-12-06 15:39:02.000000000 -0500
+++ pkg-config-0.25/pkg.m4	2010-08-25 11:29:21.000000000 -0400
@@ -72,7 +72,8 @@
     pkg_cv_[]$1="$$1"
  elif test -n "$PKG_CONFIG"; then
     PKG_CHECK_EXISTS([$3],
-                     [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`],
+                     [AS_IF([pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3"`],
+		            [],[pkg_failed=yes])],
 		     [pkg_failed=yes])
  else
     pkg_failed=untried