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, 2 insertions, 0 deletions

diff --git a/src/ccl.h b/src/ccl.h
index 71139175be5..cc5daf11e1c 100644
--- a/src/ccl.h
+++ b/src/ccl.h
@@ -26,6 +26,8 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #ifndef EMACS_CCL_H
 #define EMACS_CCL_H
 
+#include "character.h" /* For MAX_MULTIBYTE_LENGTH */
+
 /* Macros for exit status of CCL program.  */
 #define CCL_STAT_SUCCESS        0 /* Terminated successfully.  */
 #define CCL_STAT_SUSPEND_BY_SRC 1 /* Terminated by empty input.  */