c/547: __i686__ macros have disappeared

[Joseph Myers]

>Number:         547
>Category:       c
>Synopsis:       __i686__ macros have disappeared
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Sep 18 02:26:00 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     Joseph S. Myers
>Release:        2.96
>Organization:
none
>Environment:
System: Linux decomino 2.2.17 #1 Mon Sep 4 20:22:16 UTC 2000 i686 unknown
Architecture: i686

	
host: i686-pc-linux-gnu
build: i686-pc-linux-gnu
target: i686-pc-linux-gnu
>Description:

When building on x86 with -mcpu=pentiumpro -march=pentiumpro, GCC
predefines macros including __pentiumpro__ and __tune_pentiumpro__.
However, CVS GCC does not define __i686__ or __i686, which were
defined by GCC 2.95.2.  Glibc uses the macro __i686__.

I think the macros __i686__ and __i686 should be defined again when
building for arch=i686, and the macros __i586__ and __i586 for
arch=i586 (in addition to the current __pentiumpro__ and __pentium__
macros).

>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: