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Date: Tue, 27 Jul 2010 07:29:48 +0800
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Subject: Re: Runtime SEGV from gcc -O3 -march=native
From: Huang Bambo <bambo DOT huang AT gmail DOT com>
To: cygwin AT cygwin DOT com
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Use -O2 instead, I also have trouble on use -O3.

2010/7/27 Joseph Quinsey <jquinsey AT entrenet DOT com>:
> Again, just FYI, with a simpler example, and with -march=3Dnative replace=
d by
> k8 or athlon64.
>
> Source code:
>
> int main(void) {
> =A0 =A0static int foo[4];
> =A0 =A0int i;
> =A0 =A0for (i =3D 0; i < 4; i++)
> =A0 =A0 =A0 =A0foo[i] =3D 0;
> =A0 =A0return 0;
> }
>
> Compile and run, using Cygwin's current gcc version 4.3.4:
>
> =A0 =A0gcc -O3 -march=3Dathlon64 foobar.c
> =A0 =A0./a.exe
> =A0 =A0Segmentation fault (core dumped)
>
>
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