Allows you to call the C RTL from other languages or to
    use the C RTL when your main function is not in C. It
    initializes the run-time environment and establishes both an exit
    and condition handler. VAXC$CRTL_INIT is a synonym for DECC$CRTL_
    INIT. Either name invokes the same routine.

    Format

      #include  <signal.h>

      void DECC$CRTL_INIT(void);