Bug#842513: vlc: immediate crash on launch on powerpc

[Adrian Bunk]

On Tue, Nov 08, 2016 at 03:29:43PM -0500, Lennart Sorensen wrote:
>...
> -    CFLAGS="${CFLAGS} -maltivec"
> +    CFLAGS="${CFLAGS} -maltivec -fno-tree-vectorize"
>...
> And I realized the reason it was broken is that when using -maltivec and
> -O4 (which vlc uses), you get -ftree-vectorize automatically enabled
> which means gcc starts to automatically generate vector instructions
> all over the place, which is not desired in this case.  It rather defeats
> the purpose of having a cpu feature check after all.

I do not understand this part.

-maltivec should only be set for the code that is behind the runtime 
feature check, so this code is only run on hardware that has AltiVec.

cu
Adrian

[1] 

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