84 #  define OS_CODE  1  macro
89 #    define OS_CODE 4  macro
91 #    define OS_CODE 11  macro
93 #    define OS_CODE 8  macro
98 #  define OS_CODE  5  macro
102 #  define OS_CODE  6  macro
109 #  define OS_CODE  7  macro
113 #  define OS_CODE 13  macro
117 #  define OS_CODE  10  macro
121 #  define OS_CODE 19  macro
137 #  define OS_CODE  3  /* assume Unix */  macro