When you add the +h flag to CC, and compile C++ source code on
the sequent containing references to the functions S_LOCK and S_UNLOCK,
you will be warned that these functions are undeclared functions.
Don't worry about this.  S_LOCK and S_UNLOCK are Sequent C compiler
assembly language macros, and their definitions cannot be passed
through CC.  That's what +h is for.

Other warnings reported by CC may or may not be cause for alarm.
