--- configure.ac.orig	Sun Mar 15 21:45:29 2015
+++ configure.ac	Sun Mar 15 21:59:45 2015
@@ -490,7 +490,7 @@
 	# we ensure that we can compile _and_ link an assembly file containing an @unwind section
 	# since the compiler can support it and not the linker (ie old binutils)
 	if $CC -Wa,--fatal-warnings $CFLAGS -c conftest1.s > /dev/null 2>&1 && \
-           $CC conftest2.c conftest1.o > /dev/null 2>&1 ; then
+           $CC $CFLAGS conftest2.c conftest1.o > /dev/null 2>&1 ; then
 	    libffi_cv_as_x86_64_unwind_section_type=yes
 	fi
 	])