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Re: [Help-gsl] Target machine defined by gsl-1.15 ? Or by gcc ?

From: Rhys Ulerich
Subject: Re: [Help-gsl] Target machine defined by gsl-1.15 ? Or by gcc ?
Date: Mon, 24 Sep 2012 11:34:14 -0500

Hi Richard,

> I did a build of gsl-1.15 using gcc.exe (tdm64-1) 4.6.1 under MSYS, and I 
> used the following command line for configure:
> ./configure CFLAGS="-g -O2 -march=native -fexceptions" 
> --prefix=/c/gsl-1.15_64_-g_O2 &> gsl-1.15_configure.out
> ...
> ...the config.log has the following line in the "Platform" section display:
> uname -m = i686

I would have expected something different from 'uname -m'.  But I know
nothing about MSYS.

Do the compilation messages echoed by 'make' omit the -march=native
flag you supplied?

If not, can you compile a small test binary with -march=nature and -S
that should contain, say, SSE instructions and observe them in the
output assembly.

If so, then I'd dig into the reason behind the weird 'uname -m' output.

- Rhys

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