Re: #if vs. #ifdef -- again (was: AC_CHECK_SIZEOF failing on undefined HAVE_STDINT_H with -Werror)

[Stepan Kasal]

Hello,

On Tue, Aug 15, 2006 at 03:45:13PM +0200, Ralf Wildenhues wrote:
> Neither can I, but there has been a move in some GNU packages (Autoconf,
> Gnulib) from #ifdef to #if, which I've never understood.  If we want a
> move back, we need to know the incentives that caused it in the first
> place, and see whether the reasons for it are (still) valid, to avoid
> bouncing back and forth.

that's why asked here.  Let's wait for an answer from Paul.

> I believe the feedback loop on some of the more obscure issues w.r.t.
> Autoconf can easily execed a couple of years.  Not sure if this is one
> of them.

Well, the move from #ifdef to #if happened sometimes around 2000.

Autoconf 2.50 already used #if in all code (w/ 1 exception).
Autoconf 2.13 used #ifdef in the code almost exclusively (w/ one
exception), but the manual used #if.

Stepan