main.h
// "Public" Symbols from main.c

// Decide whether "PUBLIC" is to provide a definition or a declaration
#if defined DO_MAIN_DEFINITIONS
// "PUBLIC" is to provide a definition
#define DOC 
#else
// "PUBLIC" is to provide an extern declaration
#define DOC extern
#endif

// Now the "Public" Symbols

PUBLIC char tom;
PUBLIC int  dick;
PUBLIC long harry;