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Comments on Warn of implicit cast in a function's arguments with GCC?
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Warn of implicit cast in a function's arguments with GCC?
In the C program below, I make a mistake and call the function with (ld, ld) instead of (d, ld).
#include <stdio.h>
#include <limits.h>
void print_int_long(int n, long l){
printf("%+d %+ld\n", n, l);
}
int main(){
int d = 0;
long ld = INT_MAX + 1L;
print_int_long(ld, ld);
return(d);
}
If lucky, such mistakes may be innocuous, but here it is not: Instead of +0 +2147483648 I get -2147483648 +2147483648 because of an integer overflow.
Of course, this is but a dumb example, but I would like to be warned if I make such mistake in a real program. Is there any GCC flag that will detect and warn about this kind of implicit cast? I am used to -Wall -Wpedantic -Wextra but those did not raise a warning. I have also looked in GCC warning options but I failed to find something.
Always open to other approaches too.
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