#undef sys_nsig
#ifndef NULL
-# ifdef __STDC__
+# ifdef ANSI_PROTOTYPES
# define NULL (void *) 0
# else
# define NULL 0
/*
-@deftypefn Extension int signo_max ()
+@deftypefn Extension int signo_max (void)
Returns the maximum signal value for which a corresponding symbolic
name or message is available. Note that in the case where we use the