x264: for x32, disable asm and pass -mx32

We should probably patch it to stop adding the -m argument to CFLAGS/LDFLAGS
in the first place, since we pass it in via CC, but this will do for now.

(From OE-Core rev: 5d2b0816a92965cdbbb2dca5d3009fbd5064b9ca)

Signed-off-by: Christopher Larson <chris_larson@mentor.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-multimedia/x264/x264/Fix-X32-build-by-disabling-asm.patch

@@ -0,0 +1,53 @@
+From 66b120079fb21ed38cab0900c63360b0a7853eaa Mon Sep 17 00:00:00 2001
+From: Christopher Larson <chris_larson@mentor.com>
+Date: Tue, 13 Dec 2016 14:22:32 -0700
+Subject: [PATCH] Fix X32 build by disabling asm
+
+This applies gentoo's x32 patch, adjusted slightly, which disables asm support
+for x32 as well as correcting -m.
+
+Debian has a different patch which does the same, and there's a superior yet
+out of date patch series on the x264 list which keeps asm support enabled, but
+doesn't successfully build at this time, and my assembly is very rusty.
+
+Upstream-Status: Pending
+Signed-off-by: Christopher Larson <chris_larson@mentor.com>
+---
+ configure | 14 ++++++++++++--
+ 1 file changed, 12 insertions(+), 2 deletions(-)
+
+diff --git a/configure b/configure
+index 3109ec4..844aeae 100755
+--- a/configure
++++ b/configure
+@@ -703,7 +703,13 @@ case $host_cpu in
+         AS_EXT=".asm"
+         ASFLAGS="$ASFLAGS -DARCH_X86_64=1 -I\$(SRCPATH)/common/x86/"
+         stack_alignment=16
+-        [ $compiler = GNU ] && CFLAGS="-m64 $CFLAGS" && LDFLAGS="-m64 $LDFLAGS"
++        if [ $compiler = GNU ]; then
++            if cpp_check "" "" "__ILP32__" ; then
++                CFLAGS="-mx32 $CFLAGS" && LDFLAGS="-mx32 $LDFLAGS"
++            else
++                CFLAGS="-m64 $CFLAGS" && LDFLAGS="-m64 $LDFLAGS"
++            fi
++        fi
+         if [ "$SYS" = MACOSX ]; then
+             ASFLAGS="$ASFLAGS -f macho64 -DPIC -DPREFIX"
+             if cc_check '' "-arch x86_64"; then
+@@ -722,7 +728,11 @@ case $host_cpu in
+                 RCFLAGS="--target=pe-x86-64 $RCFLAGS"
+             fi
+         else
+-            ASFLAGS="$ASFLAGS -f elf64"
++            if cpp_check "" "" "__ILP32__" ; then
++                asm=no
++            else
++                ASFLAGS="$ASFLAGS -f elf64"
++            fi
+         fi
+         ;;
+     powerpc*)
+-- 
+2.8.0
+

meta/recipes-multimedia/x264/x264_git.bb

@@ -10,6 +10,7 @@ DEPENDS = "yasm-native"
 
 SRC_URI = "git://github.com/mirror/x264;branch=stable \
            file://don-t-default-to-cortex-a9-with-neon.patch \
+           file://Fix-X32-build-by-disabling-asm.patch \
            "
 
 SRCREV = "86b71982e131eaa70125f8d0e725fcade9c4c677"