Could someone (Keith?) please remind me how to avoid the following compiler warning: D:\usr\eli>gcc -Wall -pedantic -c tsnprintf.c tsnprintf.c: In function 'foo': tsnprintf.c:8:22: warning: ISO C does not support the 'I64' mingw_printf length modifier [-Wformat=] 8 | snprintf (buf, 40, "%" PRIu64, bar); | ^~~ The test program is attached below. One way of getting rid of this is to use _snprintf instead, but is there a cleaner way? I thought some function attribute could solve this, perhaps? (And please don't suggest not to use -pedantic: that's out of my hands, since this is how the libiberty library is compiled, e.g. as part of GNU Binutils. Which is where I bumped into this annoyance.) TIA. Here's the test program I used: #include <stdio.h> #include <inttypes.h> char * foo (uint64_t bar) { static char buf[80]; snprintf (buf, 40, "%" PRIu64, bar); return buf; }