/usr/src/servers/pm/proto.h

In the section for file misc.c add a PROTOTYPE declaration for the new do_xxxx. The PROTOTYPE macro generatess ANSI prototypes or KR prototypes depending on the compiler used to build minix. Yuk.

For example,

  _PROTOTYPE( int do_mygetpid, (void)                           );
  _PROTOTYPE( void setreply, (int proc_nr, int result)          );

The _PROTOTYPE macro is define like this:

#ifdef ANSI
#define _PROTOTYPE(a,b) a##b
#else
#define _PROTOTYPE(a,b) a()
#endif

When the preprocessor sees the two macro calls above it generates

If ANSI is defined, standard ANSI declarations are generated

     int do_mygetpid (void);
     void setreply (int proc_nr, int result);

else old style Kernighan-Ritchie declarations with parameter list omitted:

     int do_mygetpid();
     void setreply();