https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86102
Bug ID: 86102
Summary: Include argument name in warning
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: jg at jguk dot org
Target Milestone: ---
Could GCC list the parameter name please?
Current output
$ gcc -O2 -Wall -Wextra -Wpedantic -o main main.c
main.c: In function ‘main’:
main.c:9:12: warning: format ‘%zu’ expects argument of type ‘size_t’, but
argument 3 has type ‘char *’ [-Wformat=]
printf("result: %zu %zu %zu\n", value, "test", str);
^
main.c:9:12: warning: format ‘%zu’ expects argument of type ‘size_t’, but
argument 4 has type ‘char *’ [-Wformat=]
Improved output:
$ gcc -O2 -Wall -Wextra -Wpedantic -o main main.c
main.c: In function ‘main’:
main.c:9:12: warning: format ‘%zu’ expects argument of type ‘size_t’, but
argument 3 '"test"' has type ‘char *’ [-Wformat=]
printf("result: %zu %zu %zu\n", value, "test", str);
^
main.c:9:12: warning: format ‘%zu’ expects argument of type ‘size_t’, but
argument 4 'str' has type ‘char *’ [-Wformat=]
This example as a string-litteral (as I believe it is called) in arg 3, and a
char* pointer as arg 4.
//gcc -O2 -Wall -Wextra -Wpedantic -o main main.c
#include <stdio.h>
int main (void)
{
size_t value = 0;
char * str = "other";
printf("result: %zu %zu %zu\n", value, "test", str);
return 0;
}
