Index: libffi/ChangeLog
===================================================================
--- libffi.orig/ChangeLog
+++ libffi/ChangeLog
@@ -1,3 +1,8 @@
+2011-02-08  Rafael Avila de Espindola  <respindola@mozilla.com>
+
+	* configure.ac: Fix x86 test for pc related relocs.
+	* confifure: Rebuilt.
+
 2011-02-07  Joel Sherrill <joel.sherrill@oarcorp.com>
 
 	* libffi/src/m68k/ffi.c: Add RTEMS support for cache flushing.
Index: libffi/configure
===================================================================
--- libffi.orig/configure
+++ libffi/configure
@@ -14517,10 +14517,10 @@ if test "${libffi_cv_as_x86_pcrel+set}" 
   $as_echo_n "(cached) " >&6
 else
 
-	libffi_cv_as_x86_pcrel=yes
+	libffi_cv_as_x86_pcrel=no
 	echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
-	if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
-	    libffi_cv_as_x86_pcrel=no
+	if $CC $CFLAGS -c conftest.s > /dev/null; then
+	   libffi_cv_as_x86_pcrel=yes
 	fi
 
 fi
Index: libffi/configure.ac
===================================================================
--- libffi.orig/configure.ac
+++ libffi/configure.ac
@@ -283,10 +283,10 @@ fi
 if test x$TARGET = xX86 || test x$TARGET = xX86_WIN32 || test x$TARGET = xX86_64; then
     AC_CACHE_CHECK([assembler supports pc related relocs],
 	libffi_cv_as_x86_pcrel, [
-	libffi_cv_as_x86_pcrel=yes
+	libffi_cv_as_x86_pcrel=no
 	echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
-	if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
-	    libffi_cv_as_x86_pcrel=no
+	if $CC $CFLAGS -c conftest.s > /dev/null; then
+	   libffi_cv_as_x86_pcrel=yes
 	fi
 	])
     if test "x$libffi_cv_as_x86_pcrel" = xyes; then