#define bool ...

    Boolean value, and is 8-bits.  Represents value 0 or 1.  In
    C++ code this type is defined by the C++, and this definition is
    not used.

    #ifdef SILC_MACOSX
    #define bool _Bool
    #endif
    
    #ifndef __cplusplus
    #ifndef bool
    #define bool unsigned char
    #endif
    #endif