gstreamer1.0-libav: fix build for i586 with gcc

Backport a patch from debian to fix the build for i586 with gcc, the
patch is similar to libav's
workaround-to-build-libav-for-i586-with-gcc.patch.

(From OE-Core rev: 186df51c49987b44bfcf21d133ad9fe80f0790bb)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 27 insertions, 0 deletions

diff --git a/meta/recipes-multimedia/gstreamer/gstreamer1.0-libav/workaround-to-build-gst-libav-for-i586-with-gcc.patch b/meta/recipes-multimedia/gstreamer/gstreamer1.0-libav/workaround-to-build-gst-libav-for-i586-with-gcc.patch
new file mode 100644
index 0000000000..ccadea4d5c
--- /dev/null
+++ b/meta/recipes-multimedia/gstreamer/gstreamer1.0-libav/workaround-to-build-gst-libav-for-i586-with-gcc.patch
@@ -0,0 +1,26 @@
+Description: Workaround to build libav for i586 with gcc 4.9.2 by avoiding memset
+Author: Bernhard Übelacker <bernhardu@vr-web.de>
+
+---
+Bug-Debian: https://bugs.debian.org/783082
+Last-Update: 2015-04-28
+
+Upstream-Status: Backport [debian]
+
+Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
+
+--- gst-libav-1.4.5.orig/gst-libs/ext/libav/libavcodec/h264_cabac.c
++++ gst-libav-1.4.5/gst-libs/ext/libav/libavcodec/h264_cabac.c
+@@ -2020,7 +2020,11 @@ decode_intra_mb:
+         // In deblocking, the quantizer is 0
+         h->cur_pic.qscale_table[mb_xy] = 0;
+         // All coeffs are present
+-        memset(h->non_zero_count[mb_xy], 16, 48);
++        /*memset(h->non_zero_count[mb_xy], 16, 48);*/
++            /* avoiding this memset because it leads at least with gcc4.9.2 to error: 'asm' operand has impossible constraints */
++        for (size_t i = 0; i < 48; i++) {
++            ( (unsigned char*)(h->non_zero_count[mb_xy]) ) [i] = 16;
++        }
+         h->cur_pic.mb_type[mb_xy] = mb_type;
+         h->last_qscale_diff = 0;
+         return 0;
diff --git a/meta/recipes-multimedia/gstreamer/gstreamer1.0-libav_1.4.5.bb b/meta/recipes-multimedia/gstreamer/gstreamer1.0-libav_1.4.5.bb
index 11b1cfb08d..97fc7ec3f8 100644
--- a/meta/recipes-multimedia/gstreamer/gstreamer1.0-libav_1.4.5.bb
+++ b/meta/recipes-multimedia/gstreamer/gstreamer1.0-libav_1.4.5.bb
@@ -12,6 +12,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=b234ee4d69f5fce4486a80fdaf4a4263 \
 SRC_URI = " \
     http://gstreamer.freedesktop.org/src/gst-libav/gst-libav-${PV}.tar.xz \
     file://0001-Disable-yasm-for-libav-when-disable-yasm.patch \
+    file://workaround-to-build-gst-libav-for-i586-with-gcc.patch \
 "
 SRC_URI[md5sum] = "f4922a46adbcbe7bd01331ff5dc7979d"
 SRC_URI[sha256sum] = "605c62624604f3bb5c870844cc1f2711779cc533b004c2aa1d8c0d58557afbbc"