[PATCH] math.h: Warn about an already-defined log macro

[Joseph Myers]

On Mon, 4 Sep 2017, Florian Weimer wrote:

> This is a common programming error, and the cause of the problem is not
> always obvious.
> 
> <tgmath.h> defines a log macro, but it includes <math.h> before that, so
> that is compatible with the warning.
> 
> 2017-09-04  Florian Weimer  <fweimer@redhat.com>
> 
> 	* math/math.h: Issue warning if log is defined.

OK.

-- 
Joseph S. Myers
joseph@codesourcery.com