Currently the following symbols exist:
@beginDefList
+@itemdef{wxHAS_3STATE_CHECKBOX, Defined if wxCheckBox supports wxCHK_3STATE
+ flag, i.e. is capable of showing three states and not only the usual two.
+ Currently defined for almost all ports.}
@itemdef{wxHAS_ATOMIC_OPS, Defined if wxAtomicInc() and wxAtomicDec() functions
have an efficient (CPU-specific) implementation. Notice that the functions
themselves are always available but can be prohibitively slow to use when
@itemdef{wxHAS_LARGE_FFILES, Defined if wxFFile supports files more than 4GB in
size (notice that you must include @c wx/filefn.h before testing for this
symbol).}
+@itemdef{wxHAS_LONG_LONG_T_DIFFERENT_FROM_LONG, Defined if compiler supports a
+ 64 bit integer type (available as @c wxLongLong_t) and this type is
+ different from long. Notice that, provided wxUSE_LONGLONG is not turned
+ off, some 64 bit type is always available to wxWidgets programs and this
+ symbol only indicates a presence of such primitive type. It is useful to
+ decide whether some function should be overloaded for both
+ <code>long</code> and <code>long long</code> types.}
@itemdef{wxHAS_MULTIPLE_FILEDLG_FILTERS, Defined if wxFileDialog supports multiple ('|'-separated) filters.}
@itemdef{wxHAS_POWER_EVENTS, Defined if wxPowerEvent are ever generated on the current platform.}
@itemdef{wxHAS_RADIO_MENU_ITEMS,