Robert P. J. DAY says:
According to Mike Frysinger, this patch was removed from Gentoo in the
2.3.x series and didn't seem to cause any adverse effects. So toss it
from the patch directories for glibc 2.5 and up.
1 2007-02-15 Khem Raj <kraj@xxxxxxxxxx>
3 * sysdeps/unix/sysv/linux/i386/sysdep.h: Re-define __i686.
4 * nptl/sysdeps/pthread/pt-initfini.c: Ditto.
8 Index: glibc-2.4/sysdeps/unix/sysv/linux/i386/sysdep.h
9 ===================================================================
10 --- glibc-2.4/sysdeps/unix/sysv/linux/i386/sysdep.h (revision 1469)
11 +++ glibc-2.4/sysdeps/unix/sysv/linux/i386/sysdep.h (working copy)
13 #include <dl-sysdep.h>
16 +#if defined __i686 && defined __ASSEMBLER__
18 +#define __i686 __i686
21 /* For Linux we can use the system call table in the header file
22 /usr/include/asm/unistd.h
23 Index: glibc-2.4/nptl/sysdeps/pthread/pt-initfini.c
24 ===================================================================
25 --- glibc-2.4/nptl/sysdeps/pthread/pt-initfini.c (revision 1469)
26 +++ glibc-2.4/nptl/sysdeps/pthread/pt-initfini.c (working copy)
28 /* Embed an #include to pull in the alignment and .end directives. */
29 asm ("\n#include \"defs.h\"");
31 +asm ("\n#if defined __i686 && defined __ASSEMBLER__");
32 +asm ("\n#undef __i686");
33 +asm ("\n#define __i686 __i686");
36 /* The initial common code ends here. */
37 asm ("\n/*@HEADER_ENDS*/");