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

From: "Paul Pluzhnikov" <ppluzhnikov at google dot com>
To: libc-alpha at sourceware dot org
Date: Fri, 23 May 2008 14:42:02 -0700
Subject: Re: [RFC PATCH] glibc doesn't build with "gcc -march=i686"
References: <8ac60eac0805231437v6fc087e4t72c7d1a663d5c9d3@mail.gmail.com>

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.

Attachment: libc-i686.patch.txt
Description: Text document

Follow-Ups:
- Re: [RFC PATCH] glibc doesn't build with "gcc -march=i686"
  - From: Ulrich Drepper

References:
- [RFC PATCH] glibc doesn't build with "gcc -march=i686"
  - From: Paul Pluzhnikov

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