What you have to look for on 64 bit

Corinna Vinschen corinna-cygwin@cygwin.com
Tue Mar 19 17:46:00 GMT 2013


On Mar 19 13:12, Ken Brown wrote:
> On 3/19/2013 6:48 AM, Corinna Vinschen wrote:
> ><annoying lecturing>
> >
> >Bottom line is, when building packages for 64 bit, make sure to
> >switch on warnings for missing prototypes and if you get these
> >warnings, make sure to include the right headers to get the prototype.
> >Otherwise, SEGV ensues.
> >
> ></annoying lecturing>
> 
> I tried your printf example, and as you said, it compiled but
> crashed. But gcc didn't report the missing prototype, even though I
> compiled with `gcc -Wmissing-prototypes'.  Did I do something wrong?
> Here's the source file:
> 
> #include <stdio.h>
> #include <errno.h>
> int
> main ()
> {
>   printf ("%s\n", strerror (EINVAL));
> }

Sorry, I didn't notice that.  Try -Wimplicit-function-declaration
instead.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat



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