[pulseaudio-discuss] webrtc: build failures on i386

[Rex Dieter]

Rex Dieter wrote:

> Felipe Sateler wrote:
> 
>>> Is there some reason you can't /build/ with SSE2 support on the
>>> compiler? Or were you suggesting that we needed to add  compiler flags
>>> to make this work?
>> 
>> My fear is that enabling SSE2 support globally for the library might
>> induce gcc to use SSE2 instructions in its generated code. See the
>> -msse section in the gcc manual[1]:
>> 
>>> In particular, the file containing the CPU detection code should be
>>> compiled without these options.
>> 
>> So, I think what is needed is to split sse-using functions to a
>> separate file and add -msse2 only to that file. However, I am not very
>> confident I understand this very well, so this may not be optimal
>> either.
> 
> Ah, sneaky, if that's true, the approach I took in the initial patches I
> posted elsewhere in this thread aren't ideal either.
> 
> I'll go back and see if I can work up something better.

OK, this version applies the -msse2 flag only to the source objects that 
need it, and it at least compiles.  No runtime testing done yet.

(I'll do more testing, and followup if I find anything more is needed)

-- Rex
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