Re: How to get AC_DEFINE to generate a macro, e.g., #define incr(x) ((x)+1) ?

[Fred Proctor]

Hi All,

Thanks for your replies on AC_DEFINE for a macro with arguments. I used 
an increment function as a simple example but I don't really have a 
problem with an increment function. My real problem was with the 
"floorf()" math function, a float version of the double "floor()" 
function in math.h. This works for me:

   [AC_CHECK_DECL(floorf, ,
       AH_TEMPLATE([floorf], [Math function 'floor' for floats])
       AC_DEFINE([floorf(x)], [((float) floor((double) (x)))]),
       [#include <math.h>])]

Thanks.

--Fred