On 16-Jun-06, 08:18 (CDT), Henning Makholm <[EMAIL PROTECTED]> wrote:
> Another related bug type that I found lurking in my packages when I
> investigated the warnings in this list, is trying to format a size_t
> value with a %u or %d format string, which will break if size_t is 64
> bits (unless the actual number is small and it is the last argument
> and the endianness of the architecture happens to match its stack
> growth direction). This too produces a warning on all relevant gcc
> versions, but only when compiling to a 64-bit target.
Actually, it will provide a warning on 32-bit platforms too, if one chooses the
appropriate options (-Wall, or specifically -Wformat):
$ cat tprint.c
#include <stdio.h>
int main(void) {
int i;
size_t st;
printf("%d %lu\n", i, st);
return 0;
}
$ gcc -Wall tprint.c
tprint.c: In function 'main':
tprint.c:8: warning: format '%lu' expects type 'long unsigned int', but
argument 3 has type 'size_t'
Steve
--
Steve Greenland
The irony is that Bill Gates claims to be making a stable operating
system and Linus Torvalds claims to be trying to take over the
world. -- seen on the net
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