Re: inline related build failures on MacOS X 10.5

[Bruno Haible]

Ralf Wildenhues cited me:
> > This should ideally be solved through autoconf (let autoconf try
> > "-std=gnu99 -D__GNUC_STDC_INLINE__" instead of "-std=gnu99")

Actually, autoconf should define __GNUC_STDC_INLINE__ together with
"-std=gnu99" *only* if the compiler is an __APPLE_CC__ >= 5465. It must
not define __GNUC_STDC_INLINE__ when the compiler is a mainline gcc of
version < 4.2.

> > but since I
> > don't know when the next autoconf release will be, I'm adding this to 
> > gnulib.
> 
> Well, that isn't a reason not to put it in Autoconf now, right?
> FWIW, I don't know either, but I guess we both have a certain amount of
> influence we are able to exert.  ;-)

Yes ;-) Actually I wanted to sort out the issue at the gnulib level first,
so that it becomes more clear what autoconf should do about it at all.

Bruno