From: Glynn Clements <glynn@gclements.plus.com>
To: leslie.polzer@gmx.net
Cc: linux-c-programming@vger.kernel.org
Subject: Re: Problem with pointer to external function
Date: Fri, 1 Jul 2005 17:41:01 +0100 [thread overview]
Message-ID: <17093.29213.526059.430091@gargle.gargle.HOWL> (raw)
In-Reply-To: <20050701103026.GA2965@paktahn.black.cat>
leslie.polzer@gmx.net wrote:
> why do it get the segfault below? What's wrong?
>
>
> [sky@paktahn ~/code/cbtest]% cat main.c
> #include <stdio.h>
>
> typedef void (*callback)();
>
> extern callback cb;
Is "cd" really a pointer to a function? Or is it a function? If it's
the latter, you need to create a variable of type "callback" and then
make it point to the function, e.g.:
typedef void (*callback)();
extern void cb();
static callback cbp = &cb;
More generally, you have to ensure that the types of "extern"
declarations are correct. The compiler can't check it for you.
--
Glynn Clements <glynn@gclements.plus.com>
prev parent reply other threads:[~2005-07-01 16:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-01 10:30 Problem with pointer to external function leslie.polzer
2005-07-01 10:54 ` Rechberger Markus
2005-07-01 11:17 ` Steve Graegert
2005-07-01 16:41 ` Glynn Clements [this message]
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