--- /dev/null
+configure.ac: Verify that the Loongson MMI code can link
+
+The Loongson MMI code modifies -march and as a result it breaks linking
+when the rest of the code is built with a different -match/-mtune.
+This patch fixes the problem by trying to link the code instead of just
+compiling it. This patch is already committed upstream.
+
+Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
+
+From d77d75cc6e5de14d027d22b70389a4d0c71048b9 Mon Sep 17 00:00:00 2001
+From: Markos Chandras <markos.chandras@imgtec.com>
+Date: Wed, 15 May 2013 16:51:20 +0000
+Subject: Use AC_LINK_IFELSE to check if the Loongson MMI code can link
+
+The Loongson code is compiled with -march=loongson2f to enable the MMI
+instructions, but binutils refuses to link object code compiled with
+different -march settings, leading to link failures later in the
+compile. This avoids that problem by checking if we can link code
+compiled for Loongson.
+
+Reviewed-by: Matt Turner <mattst88@gmail.com>
+Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
+---
+diff --git a/configure.ac b/configure.ac
+index c43a0d2..221179f 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -279,7 +279,7 @@ AC_MSG_CHECKING(whether to use Loongson MMI assembler)
+
+ xserver_save_CFLAGS=$CFLAGS
+ CFLAGS=" $LS_CFLAGS $CFLAGS -I$srcdir"
+-AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
++AC_LINK_IFELSE([AC_LANG_SOURCE([[
+ #ifndef __mips_loongson_vector_rev
+ #error "Loongson Multimedia Instructions are only available on Loongson"
+ #endif
+--
+cgit v0.9.0.2-2-gbebe