--- gcc-4_6-branch/gcc/Makefile.in.orig	2012-03-06 01:10:15.277196930 -0600
+++ gcc-4_6-branch/gcc/Makefile.in	2012-03-06 01:10:54.083378912 -0600
@@ -4170,6 +4170,9 @@
 	else \
 	  set -e; for ml in `cat fixinc_list`; do \
 	    sysroot_headers_suffix=`echo $${ml} | sed -e 's/;.*$$//'`; \
+            if test "x$${sysroot_headers_suffix}" = "x"; then \
+              continue; \
+            fi; \
 	    multi_dir=`echo $${ml} | sed -e 's/^[^;]*;//'`; \
 	    fix_dir=include-fixed$${multi_dir}; \
 	    if ! $(inhibit_libc) && test ! -d ${SYSTEM_HEADER_DIR}; then \