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Re: Don't use linux.h for non-Linux targets

From: "Joseph S. Myers" <joseph at codesourcery dot com>
To: Thomas Schwinge <thomas at schwinge dot name>
Cc: gcc-patches at gcc dot gnu dot org, rmh at gnu dot org, rth at redhat dot com, jh at suse dot cz, ubizjak at gmail dot com
Date: Wed, 27 Apr 2011 10:04:17 +0000 (UTC)
Subject: Re: Don't use linux.h for non-Linux targets
References: <Pine.LNX.4.64.1104121836210.24956@digraph.polyomino.org.uk> <87wrig8x2u.fsf@kepler.schwinge.homeip.net>

On Wed, 27 Apr 2011, Thomas Schwinge wrote:

> One (minor) additional idea: for clarity, shouldn't it now be possible to
> remove any #undef GNU_USER_TARGET_OS_CPP_BUILTINS, #undef
> GNU_USER_DYNAMIC_LINKER, #undef GNU_USER_LINK_EMULATION, etc. from
> *gnu.h?  I don't expect you to test this; I'll have a look later on.

Yes, if those were only to undefine macros defined in linux.h.  In general 
there is no consistent rule about whether headers use #undef in cases 
where it is not needed.

-- 
Joseph S. Myers
joseph@codesourcery.com

References:
- Don't use linux.h for non-Linux targets
  - From: Joseph S. Myers
- Re: Don't use linux.h for non-Linux targets
  - From: Thomas Schwinge

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