Re: [PATCH] Calling AC_USE_SYSTEM_EXTENSIONS through several of its aliases should not issue a cryptic warning

[Ralf Wildenhues]

Hello, and sorry for the delay,

* Eric Blake wrote on Fri, Oct 10, 2008 at 02:42:24PM CEST:
> According to Stepan Kasal on 10/8/2008 11:11 AM:
> > 
> > * lib/autoconf/specific.m4 (AC_USE_SYSTEM_EXTENSIONS): Move
> > the body to ...
> > (_AC_USE_SYSTEM_EXTENSIONS): ... this new macro and require it
> > from the original and ...
> > (AC_GNU_SOURCE, AC_AIX, AC_MINIX): ... from all of these.
> 
> I think it looks sound; it ensures that the code is expanded only once,
> instead of once for each variant spelling.  If you wouldn't mind, can you
> also write up a NEWS item before applying?

Doesn't it break

  AC_DEFUN([FOO], 
  [
    CC=$some_override...
    AC_PROG_CC
    AC_USE_SYSTEM_EXTENSIONS
  ])

and wasn't that part of an earlier bug report?

Cheers,
Ralf