[PATCH 1/7] Fix __PTHREAD_MUTEX_HAVE_ELISION -Wundef warning

[Joseph S. Myers]

On Tue, 18 Mar 2014, Roland McGrath wrote:

> I haven't examined that particular set of macros, so I don't have something
> specific in mind.  It's just the general rule that we should organize our
> macros (including wholesale reshuffling of what we have today, if need be)
> so that every use under our control if typo-proof.

Typo-proofing also provides another case for replacing the __need_* 
scheme, as I suggested in 
<https://sourceware.org/ml/libc-alpha/2012-08/msg00510.html> and 
<https://sourceware.org/ml/libc-alpha/2012-11/msg00045.html>, so that we 
do

#include <bits/time_t.h>

instead of

#define __need_time_t
#include <time.h>

(the former being typo-proof, the latter not).

-- 
Joseph S. Myers
joseph@codesourcery.com