[Buildroot] [PATCH v2 1/1] package/ffmpeg: Fix i586 compilation with gcc5

[Buildroot] [PATCH v2 1/1] package/ffmpeg: Fix i586 compilation with gcc5

[Bernd Kuhls]

In file included from libavcodec/cabac_functions.h:46:0,
                 from libavcodec/h264_cabac.c:37:
libavcodec/h264_cabac.c: In function 'ff_h264_decode_mb_cabac':
libavcodec/x86/cabac.h:192:5: error: 'asm' operand has impossible constraints
     __asm__ volatile(

To reproduce the bug use this defconfig:

BR2_GCC_VERSION_5_1_X=y
BR2_PACKAGE_FFMPEG=y
BR2_PACKAGE_FFMPEG_GPL=y
BR2_PACKAGE_FFMPEG_NONFREE=y
BR2_PACKAGE_FFMPEG_FFPLAY=y
BR2_PACKAGE_FFMPEG_FFSERVER=y
BR2_PACKAGE_FFMPEG_FFPROBE=y
BR2_PACKAGE_FFMPEG_AVRESAMPLE=y
BR2_PACKAGE_FFMPEG_POSTPROC=y

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
---
v2: bug only occurs with a i586 target cpu

 package/ffmpeg/ffmpeg.mk |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/package/ffmpeg/ffmpeg.mk b/package/ffmpeg/ffmpeg.mk
index 787dbb1..83c3cfb 100644
--- a/package/ffmpeg/ffmpeg.mk
+++ b/package/ffmpeg/ffmpeg.mk
@@ -261,6 +261,9 @@ ifeq ($(BR2_X86_CPU_HAS_MMX),y)
 FFMPEG_CONF_OPTS += --enable-yasm
 FFMPEG_DEPENDENCIES += host-yasm
 else
+ifeq ($(BR2_x86_i586),y)
+FFMPEG_CONF_OPTS += --disable-inline-asm
+endif
 FFMPEG_CONF_OPTS += --disable-yasm
 FFMPEG_CONF_OPTS += --disable-mmx
 endif
-- 
1.7.10.4

[Buildroot] [PATCH v2 1/1] package/ffmpeg: Fix i586 compilation with gcc5

[Thomas Petazzoni]

Dear Bernd Kuhls,

On Sat, 20 Jun 2015 21:44:55 +0200, Bernd Kuhls wrote:
> In file included from libavcodec/cabac_functions.h:46:0,
>                  from libavcodec/h264_cabac.c:37:
> libavcodec/h264_cabac.c: In function 'ff_h264_decode_mb_cabac':
> libavcodec/x86/cabac.h:192:5: error: 'asm' operand has impossible constraints
>      __asm__ volatile(
> 
> To reproduce the bug use this defconfig:
> 
> BR2_GCC_VERSION_5_1_X=y
> BR2_PACKAGE_FFMPEG=y
> BR2_PACKAGE_FFMPEG_GPL=y
> BR2_PACKAGE_FFMPEG_NONFREE=y
> BR2_PACKAGE_FFMPEG_FFPLAY=y
> BR2_PACKAGE_FFMPEG_FFSERVER=y
> BR2_PACKAGE_FFMPEG_FFPROBE=y
> BR2_PACKAGE_FFMPEG_AVRESAMPLE=y
> BR2_PACKAGE_FFMPEG_POSTPROC=y
> 
> Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
> ---
> v2: bug only occurs with a i586 target cpu

Applied, thanks. Did you submit a bug report to ffmpeg upstream?

Thanks,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com