[libav-bugs] [Bug 850] New: libavcodec/h264_cabac.c fails to compile with --cpu=i586

bugzilla at aruru.libav.org bugzilla at aruru.libav.org
Thu Apr 23 13:16:08 CEST 2015


https://bugzilla.libav.org/show_bug.cgi?id=850

            Bug ID: 850
           Summary: libavcodec/h264_cabac.c fails to compile with
                    --cpu=i586
           Product: Libav
           Version: git HEAD
          Hardware: X86
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: ---
         Component: libavcodec
          Assignee: bugzilla at libav.org
          Reporter: sramacher at debian.org

Current git HEAD (9b2c57bef5e2f3f61a5fd708ba7d5351f5b3f386) fails to compile if
configure is run with --cpu=i586. The error is:

In file included from libavcodec/cabac_functions.h:42:0,
                 from libavcodec/h264_cabac.c:35:
libavcodec/h264_cabac.c: In function 'ff_h264_decode_mb_cabac':
libavcodec/x86/cabac.h:173:5: error: 'asm' operand has impossible constraints
     __asm__ volatile(
     ^
libavcodec/x86/cabac.h:173:5: error: 'asm' operand has impossible constraints
     __asm__ volatile(
     ^
Makefile:44: recipe for target 'libavcodec/h264_cabac.o' failed


This is with gcc 4.9 on a current Debian unstable system. If you need more
info, please let me know.

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