-Wformat-sign-mismatch?

[Dan Kegel]

At our company, Gimpel's PC-Lint flagged an warning
in code similar to this:
         unsigned long iResult;
         sscanf(s, "%ld", &iResult);

Do we want gcc to detect such mismatches, too?
I don't think it could as of the gcc 3.2 I tried.

If this is something gcc should be checking,
it might be good to let users control this warning
independently of other -Wformat warnings
(e.g. with a new option -Wformat-sign-mismatch).
- Dan

#include <stdio.h>

int main(int argc, char **argv)
{
         unsigned long iResult;
         int result = 1;
         /* This does not trigger any warning in gcc <= 3.2 (20020903 from rh8),
          * but does trigger a warning in Gimpel's PC-Lint
          */
         sscanf(argv[1], "%ld", &iResult);
         /* Trigger -Wformat */
         sscanf(argv[1], "%s", &iResult);
         /* Trigger -Wsign-mismatch */
         if (result != iResult)
                 printf("Not equal to 1\n");
         return (int) iResult;
}