warning_mksh
extern void warning_mksh(char *, ...);
warning_mksh("I'm in await(), and status is 0.");
warning_mksh("I'm in await(), and status is *NOT* 0.");
warning_mksh("I'm in await(), and exit_status is %d.", exit_status);
warning_mksh("I'm in await(), returning failed.");
warning_mksh(gettext("Conditional macro `%s' referenced in file `%ws', line %d"),
warning_mksh(gettext("newline is not last character in file %s"),