VMS Help CC, Run-time functions, gsignal  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Generates a specified software signal.  Generating a signal causes
  the action routine established by the signal, ssignal, or sigvec
  function to be invoked.

  Syntax:

       #include <signal.h>

       int gsignal(int sig [, int sigcode]);