[FFmpeg-devel] [PATCH] libavcodec: fix building without asm

[Hendrik Leppkes]

On Fri, Feb 5, 2016 at 9:33 PM, Michael Bradshaw <mjbshaw at gmail.com> wrote:
> Hi,
>
> Attached patch fixes building ffmpeg on OS X with the following
> configuration: --disable-optimizations --disable-asm
>
> Without this patch the following error is observed:
>
> LD ffmpeg_g
> Undefined symbols for architecture x86_64:
>   "_ff_spatial_idwt_init_mmx", referenced from:
>       _ff_spatial_idwt_init2 in libavcodec.a(dirac_dwt.o)
> ld: symbol(s) not found for architecture x86_64
> clang: error: linker command failed with exit code 1 (use -v to see
> invocation)
> make: *** [ffmpeg_g] Error 1
>
>

Clang fails to figure out that if (x && 0) is dead code? Oh my.

- Hendrik