Re: [RFC PATCH] glibc doesn't build with "gcc -march=i686"

[Mike Frysinger <vapier at gentoo dot org>]

On Friday 23 May 2008, Paul Pluzhnikov wrote:
> Attempting to build glibc (cvs) with CC='gcc -march=i686' results in
> errors:
>
> ../sysdeps/i386/fpu/s_frexp.S: Assembler messages:
> ../sysdeps/i386/fpu/s_frexp.S:66: Error: invalid identifier for ".ifdef"
> ../sysdeps/i386/fpu/s_frexp.S:66: Error: junk at end of line, first
> unrecognized character is `1'
> ../sysdeps/i386/fpu/s_frexp.S:66: Error: junk at end of line, first
> unrecognized character is `1'
> ../sysdeps/i386/fpu/s_frexp.S:66: Error: junk at end of line, first
> unrecognized character is `1'
> ../sysdeps/i386/fpu/s_frexp.S:66: Error: unrecognized symbol type ""
>
> This is because gcc defines __i686 to 1 when -march=i686
>
> Attached patch fixes that, but perhaps there is a better way?

this has come up a couple of times (search the mailing list and bugzilla) and 
a few diff methods have been proposed.  modifying any specific .S file to 
#undef something certainly is not the direction to take things though.
-mike

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