Refactor window-system configuration

This change streamlines the window system selection code in
configure.in and moves many common function declarations from
window-specific headers to frame.h.  It introduces a new TERM_HEADER
macro in config.h: we set this macro to the right header to use for
the window system for which we're compiling Emacs and have source
files include it indirectly.  This way, we don't have to teach every
file about every window system.

1 files changed, 8 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 228cf1d74d7..6e93b8313e7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2012-09-01  Daniel Colascione  <dan.colascione@gmail.com>
+
+        * configure.ac: Introduce term_header variable, which holds the
+        value which will become TERM_HEADER in code.  We effect our choice
+        of window system by setting term_header and WINDOW_SYSTEM_OBJ
+        instead of using ad-hoc variables and flags for each window
+        system.
+
 2012-08-26  Paul Eggert  <eggert@cs.ucla.edu>
 
         * configure.ac (CFLAGS): Prefer -g3 to -g if -g3 works