#ifndef NTRACE
-static void itrace(unsigned mask, const char *fmt, ...)
+static void PRINTF_LIKE(2, 3) itrace(unsigned mask, const char *fmt, ...)
{
va_list ap;
dstr d = DSTR_INIT;
#define A_END ((char *)0)
-static void warn(const char *fmt, ...)
+static void EXECL_LIKE(0) IGNORABLE warn(const char *fmt, ...)
{
va_list ap;
dstr d = DSTR_INIT, dd = DSTR_INIT;