80 #  define OS_CODE  1  macro
85 #    define OS_CODE 4  macro
87 #    define OS_CODE 11  macro
89 #    define OS_CODE 8  macro
94 #  define OS_CODE  5  macro
98 #  define OS_CODE  6  macro
102 #  define OS_CODE  7  macro
106 #  define OS_CODE 13  macro
110 #  define OS_CODE  10  macro
114 #  define OS_CODE 19  macro
120 #  define OS_CODE  3  /* assume Unix */  macro