On Tue, Sep 04, 2007 at 12:20:28PM +0200, Jean-Marc Lasgouttes wrote:
> Enrico Forestieri <[EMAIL PROTECTED]> writes:
>
> > So, no, that is correct, because you could
> >
> > #define HAVE_FONTCONFIG_FONTCONFIG_H 0
>
> But this is not what autoconf does.
Because it has not to. Reading the cpp info page:
* Identifiers that are not macros, which are all considered to be the
number zero. This allows you to write `#if MACRO' instead of
`#ifdef MACRO', if you know that MACRO, when defined, will always
have a nonzero value. Function-like macros used without their
function call parentheses are also treated as zero.
I personally prefer the "#if HAVE_FOO" form but have no problems if
you force me to change it to "#if defined(HAVE_FOO)" ;-)
--
Enrico
