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From: bxpfac@umiami.ir.miami.edu
Newsgroups: comp.lang.c
Subject: Is there a NULL pointer to functions?
Message-ID: <1991May21.125639.10052@umiami.ir.miami.edu>
Date: 21 May 91 16:56:39 GMT
Reply-To: devebw9f@miavax.ir.miami.edu
Distribution: na
Organization: Univ of Miami IR
Lines: 20

As the subject heading says, is there a NULL pointer to functions?
The program shown below when compiled with gcc generated 
the following message:

In function foo:
warning: ANSI C forbids comparison of `void *' with function pointer

/*-- Program --*/

#define NULL ((void *) 0)

void  foo (void (*fun) (void))
{
      if (fun != NULL)            /* Line with the warning. */
           fun ();   
}

Thanks for any suggestions to fix this.

Bimal / devebw9f@miavax.ir.miami.edu