[cc65] cc65 pointer-to-func problems

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From: B. Watson (atari_at_hardcoders.org)
Date: 2001-07-16 07:56:24 

I'm new to the list, I didn't see any mention of this in the archives...

The following code won't compile with either cc65-2.6.1 or the 7/15 snapshot:


#include <stdio.h>

int foo(void) {
	char j=1;
	return(j);
}

main() {
	int (*func)(void) = foo; /* compiler chokes here */
	printf("%d\n",func());
}

The compiler chokes at the marked line, with Error: Incompatible pointer types
(however, it compiles just fine with gcc, and doesn't produce warnings with
 -Wall)

However, this code compiles just fine:


#include <stdio.h>

int real_foo(void) {
	char j=1;
	return(j);
}

int foo(void) {
	return real_foo();
}

main() {
	int (*func)(void) = real_foo;
	printf("%d\n",func());
}

...and runs properly (prints `1')... More generally, I don't seem to be able
to assign a pointer to a function, if that function declares any local storage
at all. 

Of course, the problem can be worked around by declaring `wrapper' functions
like the second example above, but this seems like a bug to me (and no, I'm
not enough of a C coder to figure it out in a reasonable amount of time,
or I'd submit a patch...)

In case it matters, I've tried it on both a Linux (Slackware 7.0) and a
Solaris 2.6 sparc machine, with identical results (side note: you can add
Solaris to the list of platforms cc65 runs on, on the web site... So
far, identical behavior on Linux and Solaris)

B. Watson

---
If a trainstation is the place where trains stop, what is a workstation?


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