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Re: gcc 4.7: -march=corei7-avx bug?


On Thu, 29 Mar 2012 04:53:45 -0300
Dâniel Fraga <fragabr@gmail.com> wrote:

> 	I tried to compile Firefox 11 with gcc 4.7 optimized with:
> 
> -O3 -march=corei7-avx (I have a core i7 2700k)
> 
> 	But Firefox segfaults (backtrace provided, although it seems
> not very useful):
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52762
> 
> 	If I compile with -march=corei7 it runs perfectly.
> 
> 	Maybe a gcc bug?
> 
> 	How can I help you to debug this?

We've had to disable -mavx for firefox builds due to numerous issues like
this.  Search the mozilla bugzilla for stack alignment issues.


-- 
fonts, gcc-porting
toolchain, wxwidgets
@ gentoo.org

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