usr/src/lib/libast/common/features/isoc99

   1 if tst -D_ISOC99_SOURCE -lm note{ _ISOC99_SOURCE plays nice }end link{
   2                 #include <sys/types.h>
   3                 #include <sys/stat.h>
   4                 #include <stdlib.h>
   5                 #include <unistd.h>
   6                 #include <math.h>
   7                 int main() { return signbit(-0.0); }
   8         }end {
   9                 #ifndef _ISOC99_SOURCE
  10                 #define _ISOC99_SOURCE  1
  11                 #endif
  12         }
  13 endif