[FFmpeg-devel] Patch for Mac OS X assembly-language support in trunk/libavcodec/fft_altivec_s.S

[Måns Rullgård]

Don't top-post.

Paul Sterne <make4ppc at gmail.com> writes:

> The following features of the current fft_altivec_s.S code are incompatible
> with Mac OS X:
>
> -- attempt to reference external symbol ff_cos_tab without a leading
> underscore.

It does not.

> -- attempt to load r6 with address of locally defined symbol fft_data
> through the global offset table.
> -- attempt to load r12 with address of externally defined symbol ff_cos_tabs
> through the global offset table.

Are you forcing PIC or using ppc64?  I couldn't find a ppc64 osx
machine to test on, and 32-bit doesn't use PIC (and hence not the GOT)
by default.

> gas-preprocessor.pl doesn't address these issues, and they can't easily be
> addressed by gas-preprocessor.pl because the mach-o binary format requires
> section-difference calculations instead of using the global offset table.

Can you point me at some documentation for how this should be done?

-- 
M?ns Rullg?rd
mans at mansr.com