void log_fmt( log_sev_t sev,  const char *fmt,... ) __attribute__((format(printf, 2, 3)));

#define LOG_FMT(sev, args...)                           \
   do { if (log_sev_on(sev)) { log_fmt(sev, ## args); } } while (0)

void foo()
{
try {}
catch (...) // <== HERE
{}
}