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

[Paul Pluzhnikov]

Greetings,

[Sorry, my first message had wrong attachment type.]

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?

Thanks,
--
Paul Pluzhnikov

2008-05-23  Paul Pluzhnikov  <ppluzhnikov@google.com>

       * sysdeps/i386/sysdep.h: Undef __i686 before using.
       * sysdeps/i386/i686/memcmp.S: Likewise.
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