\begin{twocollist}\itemsep=0pt
\twocolitem{\_\_WINDOWS\_\_}{any Windows, yom may also use \_\_WXMSW\_\_}
-\twocolitem{\_\_WIN16\_\_}{Win16 API}
+\twocolitem{\_\_WIN16\_\_}{Win16 API (not supported since wxWindows 2.6)}
\twocolitem{\_\_WIN32\_\_}{Win32 API}
\twocolitem{\_\_WIN95\_\_}{Windows 95 or NT 4.0 and above system (not NT 3.5x)}
+\twocolitem{\_\_WXBASE\_\_}{Only wxBase, no GUI features}
\twocolitem{\_\_WXGTK\_\_}{GTK}
\twocolitem{\_\_WXGTK12\_\_}{GTK 1.2 or higher}
\twocolitem{\_\_WXGTK20\_\_}{GTK 2.0 or higher}
\twocolitem{\_\_WXMOTIF\_\_}{Motif}
-\twocolitem{\_\_WXMAC\_\_}{MacOS}
+\twocolitem{\_\_WXMOTIF20\_\_}{Motif 2.0 or higher}
+\twocolitem{\_\_WXMAC\_\_}{Mac OS whether Classic (Mac OS 8/9 TARGET\_CARBON
+== 0) or Carbon (including Mac OS X TARGET\_CARBON == 1)}
\twocolitem{\_\_WXMGL\_\_}{SciTech Soft MGL (\_\_WXUNIVERSAL\_\_ will be also
defined)}
\twocolitem{\_\_WXMSW\_\_}{Any Windows}
\twocolitem{\_\_X\_\_}{any X11-based GUI toolkit except GTK+}
\end{twocollist}
-In fact, they should better all start with \_\_WX instead of \_\_ only. The
-only GUIs implemented for 2.0 are \_\_WXGTK\_\_, \_\_WXMSW\_\_ and
-\_\_WXMOTIF\_\_ yet. Any new ones, please start the define with \_\_WX.
+In fact, they should better all start with \_\_WX instead of \_\_ only,
+so please start any new defines with \_\_WX.
\subsection{Operating systems}
\twocolitem{\_\_AIX\_\_}{AIX}
\twocolitem{\_\_BSD\_\_}{Any *BSD system}
\twocolitem{\_\_CYGWIN\_\_}{Cygwin: Unix on Win32}
-\twocolitem{\_\_DARWIN\_\_}{Mac OS X}
+\twocolitem{\_\_DARWIN\_\_}{Mac OS X using the BSD Unix C library (as opposed to using the Metrowerks MSL C/C++ library)}
\twocolitem{\_\_DATA\_GENERAL\_\_}{DG-UX}
\twocolitem{\_\_DOS\_GENERAL\_\_}{DOS (used with wxMGL only)}
\twocolitem{\_\_FREEBSD\_\_}{FreeBSD}
\twocolitem{\_\_HPUX\_\_}{HP-UX (Unix)}
+\twocolitem{\_\_GNU\_\_}{GNU Hurd}
\twocolitem{\_\_LINUX\_\_}{Linux}
+\twocolitem{\_\_MACH\_\_}{Mach-O Architecture (Mac OS X only builds)}
\twocolitem{\_\_OSF\_\_}{OSF/1}
\twocolitem{\_\_SGI\_\_}{IRIX}
\twocolitem{\_\_SOLARIS\_\_}{Solaris}
\subsection{Miscellaneous}
\begin{twocollist}\itemsep=0pt
+\twocolitem{\_\_WXWINDOWS\_\_}{always defined in wxWindows applications, see
+also \helpref{wxCHECK\_VERSION}{wxcheckversion}}
\twocolitem{\_\_WXDEBUG\_\_}{defined in debug mode, undefined in release mode}
\twocolitem{wxUSE\_XXX}{if defined as $1$, feature XXX is active
-(the symbols of this form are always defined, use #if and not #ifdef to test
+(the symbols of this form are always defined, use \#if and not \#ifdef to test
for them)}
+\twocolitem{wxUSE\_GUI}{this particular feature test macro is defined to $1$
+when compiling or using the library with the GUI features activated, if it is
+defined as $0$, only wxBase is available.}
+\twocolitem{wxUSE\_BASE}{only used by wxWindows internally (defined as $1$ when
+building wxBase code, either as a standalone library or as part of the
+monolithic wxWindows library, defined as $0$ when building GUI library only)}
\end{twocollist}