USG
USG5_4
HAIKU Compiling on Haiku.
+__ANDROID__ Compiling for the Android operating system.
+__ANDROID_API__ A numerical "API level" indicating the version of
+ Android being compiled for; see http://apilevels.com.
** Distinguishing GUIs **
HAVE_X11 Compile support for the X11 GUI.
HAVE_PGTK Compile support for using GTK itself without directly using X Windows APIs.
HAVE_HAIKU Compile support for the Haiku window system.
-HAVE_X_WINDOWS Compile support for X Window system
- (It looks like, nowadays, if HAVE_X11 is set, HAVE_X_WINDOWS must
- be, and vice versa. At least, this is true for configure, and
- msdos; not sure about nt.)
+HAVE_X_WINDOWS Compile support for X Window system. Equivalent to HAVE_X11.
+HAVE_ANDROID Compiling the Android GUI interface. Enough of this
+ code is compiled for the build machine cross-compiling
+ the Android port to produce an Emacs binary that can
+ Lisp code in batch mode, for the purpose of compiling
+ Lisp code for packaging.
+ANDROID_STUBIFY The Android GUI interface is being compiled for the build
+ machine, as above.
** X Windows features **
HAVE_X11R6 Whether or not the system has X11R6. (Always defined.)