--- ./scripts/rfs-pkg-config.orig	2009-06-01 22:55:28.000000000 +0800
+++ ./scripts/rfs-pkg-config	2012-09-28 22:08:50.000000000 +0800
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 # Tt runs pkg-config in a way that everything is searched under RFS
 # but reported including full path. Suitable for cross-compiling
@@ -28,7 +28,7 @@ fi
 var=$(pkg-config --silence-errors "$@")
 [ "$?" -ne 0 ] && exit 1
 if [ -n "$RFS" ]; then
-    sed -e "s/\\(^\\|[[:space:]]\\)-\(I\|L\)/\\1-\\2${RFS//\//\\/}/g" <<< "$var"
+    echo "$var" | sed -e "s/\\(^\\|[[:space:]]\\)-\(I\|L\)/\\1-\\2${RFS//\//\\/}/g"
 else
     echo "$var"
 fi