trapping SIGFPE

[Peter Jay Salzman]

dear all,

i can't seem to trap any kind of floating point exception:

   #include <stdio.h>
   #include <signal.h>
   static void Exception(int signum);
   
   int main(void)
   {
        float bignum = 9E350;
        float smallnum = 9E-350;
   
        signal(SIGFPE, Exception);
   
        printf("%p\n", sigreturn);
        printf("%Lf\n", 2.0L / 0.0L);
        printf("%Le\n", bignum / smallnum);
        return 0;
   }
   
   
   void Exception(int signum)
   {
        printf("Caught SIGFPE: %d.\n", signum);
        exit(0);
   }

SIGFPE isn't being caught, even though (i believe) i correctly installed
a signal handler.

what's going on here?   how would i modify this program to catch an
overflow, underflow or divide by zero?

pete