[pulseaudio-discuss] webrtc: build failures on i386

Arun Raghavan arun at arunraghavan.net
Wed Jun 1 04:06:26 UTC 2016

On Fri, 27 May 2016, at 10:07 PM, Rex Dieter wrote:
> 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)

Were you able to test this out? The approach looks okay to me,.

-- Arun

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