https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111513
--- Comment #4 from Thomas Weißschuh <g...@t-8ch.de> ---
Thanks for the quick response Andrew!
I'll probably disable -Werror then.
FYI:
If I drop the `#include <libintl.h>` and instead declare `dcgettext` on my own,
adding `__attribute__((returns_nonnull)), the issue persists.
Maybe the special handling for gettext() in GCC with regards to format_arg
conflicts here.
/* test.c
*
* compile with:
* gcc -Wall -fsanitize=undefined -O2 test.c
*/
#include <stdio.h>
__attribute__((format_arg(2), returns_nonnull))
extern char *dcgettext (const char *__domainname, const char *__msgid, int
__category);
int main(void)
{
FILE *out = stdout;
fputs("\n", out);
printf(dcgettext(NULL, "foo\n", 0));
fputs("\n", out);
}
$ gcc -Wall -fsanitize=undefined -O2 test.c -Wextra
test.c: In function ‘main’:
test.c:16:9: warning: null format string [-Wformat-overflow=]
16 | printf(dcgettext(NULL, "foo\n", 0));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test.c:16:9: warning: null format string [-Wformat-overflow=]
