On Thu, Aug 30, 2018 at 01:11:23PM -0500, Ian Bruene wrote: > > Hello > > I am one of the developers on NTPsec and we are getting warnings on NetBSD > 8.0 in the form: > > ../../ntpd/ntp_io.c:1962:14: warning: %m is only allowed in syslog(3) like > functions [-Wformat=] > > This feature appears to have been added here: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67956 > > From googling I have been able to find the flag that is set for this warning > to be suppressed, but we have not been able to find any documentation on how > to properly identify a function as "syslog like"
Well, it is essentially (v)syslog. The point is that %m is not a generic format string for all printf-like functions. That's a GNUism. Portable code should use strerror explicitly. Joerg
