[FFmpeg-devel] [PATCH v2 1/2] swscale: Replace illegal vector keyword usage in altivec code

[Carl Eugen Hoyos]

Am Mi., 7. Aug. 2019 um 19:39 Uhr schrieb Daniel Kolesa <daniel at octaforge.org>:
>
> While this technically compiles in current ffmpeg, this is only
> because ffmpeg is compiled in strict ISO C mode, which disables
> the builtin 'vector' keyword for AltiVec/VSX. Instead this gets
> replaced with a macro inside altivec.h, which defines vector to
> be actually __vector, which accepts random types.
>
> Normally, the vector keyword should be used only with plain
> scalar non-typedef types, such as unsigned int. But we have the
> vec_(s|u)(8|16|32) macros, which can be used in a portable manner,
> in util_altivec.h in libavutil.
>
> This is also consistent with other AltiVec/VSX code elsewhere in
> the tree.
>
> Fixes #7861.

Since I cannot reproduce any issue with current FFmpeg on Power8
using gcc-8.3.1, at least the commit message has to be changed,
same for the other patch.

Carl Eugen