Allow DDX to provide a main()

XQuartz already conditionally renames main() as dix_main() so it can provide
it's own main().  This isn't the ideal way of doing this, as it prevents libdix
built this way from being useful with any other DDX.

So instead, always name that function dix_main(), and also provide a stub main()
which just calls dix_main(), which can be overriden in the DDX.

Add a main() to XWin (XQuartz already has one, of course).

It's no longer neccessary to link XWin and XQuartz with libmain.

v2: Remove unneeded stub main hw/xwin/InitOutput.c

Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Reviewed-by: Julien Cristau <jcristau@debian.org>
Reviewed-by: Colin Harrison <colin.harrison@virgin.net>

configure.ac

@@ -1967,7 +1967,7 @@ if test "x$XQUARTZ" = xyes; then
 	AC_DEFINE(XQUARTZ,1,[Have Quartz])
 	AC_DEFINE(ROOTLESS,1,[Build Rootless code])
 
-	XQUARTZ_LIBS="$MAIN_LIB $FB_LIB $FIXES_LIB $XEXT_LIB $DBE_LIB $RECORD_LIB $RANDR_LIB $RENDER_LIB $DAMAGE_LIB $MIEXT_SYNC_LIB $MIEXT_DAMAGE_LIB $MIEXT_SHADOW_LIB $XI_LIB $XKB_LIB $XKB_STUB_LIB $XPSTUBS_LIB"
+	XQUARTZ_LIBS="$FB_LIB $FIXES_LIB $XEXT_LIB $DBE_LIB $RECORD_LIB $RANDR_LIB $RENDER_LIB $DAMAGE_LIB $MIEXT_SYNC_LIB $MIEXT_DAMAGE_LIB $MIEXT_SHADOW_LIB $XI_LIB $XKB_LIB $XKB_STUB_LIB $XPSTUBS_LIB"
 	AC_SUBST([XQUARTZ_LIBS])
 
 	AC_CHECK_LIB([Xplugin],[xp_init],[:])

dix/Makefile.am

@@ -4,7 +4,7 @@ AM_CPPFLAGS = -I$(top_srcdir)/include
 AM_CFLAGS = $(DIX_CFLAGS)
 
 libmain_la_SOURCES =    \
-	main.c
+	stubmain.c
 
 libdix_la_SOURCES = 	\
 	atom.c		\
@@ -14,6 +14,7 @@ libdix_la_SOURCES = 	\
 	dispatch.c	\
 	dispatch.h	\
 	dixfonts.c	\
+	main.c		\
 	dixutils.c	\
 	enterleave.c	\
 	enterleave.h	\

dix/main.c

@@ -125,14 +125,10 @@ BOOL serverRunning = FALSE;
 pthread_mutex_t serverRunningMutex = PTHREAD_MUTEX_INITIALIZER;
 pthread_cond_t serverRunningCond = PTHREAD_COND_INITIALIZER;
 
-int dix_main(int argc, char *argv[], char *envp[]);
+#endif
 
 int
 dix_main(int argc, char *argv[], char *envp[])
-#else
-int
-main(int argc, char *argv[], char *envp[])
-#endif
 {
     int i;
     HWEventQueueType alwaysCheckForInput[2];

dix/stubmain.c

@@ -0,0 +1,35 @@
+/***********************************************************
+
+Copyright 2012 Jon TURNEY
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice (including the next
+paragraph) shall be included in all copies or substantial portions of the
+Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
+
+******************************************************************/
+
+int dix_main(int argc, char *argv[], char *envp[]);
+
+/*
+  A default implementation of main, which can be overridden by the DDX
+ */
+int
+main(int argc, char *argv[], char *envp[])
+{
+    return dix_main(argc, argv, envp);
+}

hw/xwin/Makefile.am

@@ -153,7 +153,7 @@ INCLUDES = -I$(top_srcdir)/miext/rootless
 
 XWIN_SYS_LIBS += -ldxguid
 
-XWin_DEPENDENCIES = $(MULTIWINDOWEXTWM_LIBS) $(XWIN_GLX_LIBS) $(XWIN_LIBS) $(MAIN_LIB) $(XSERVER_LIBS)
+XWin_DEPENDENCIES = $(MULTIWINDOWEXTWM_LIBS) $(XWIN_GLX_LIBS) $(XWIN_LIBS) $(XSERVER_LIBS)
 XWin_LDADD = $(MULTIWINDOW_LIBS) $(MULTIWINDOWEXTWM_LIBS) $(XWIN_GLX_LIBS) $(XWIN_GLX_LINK_FLAGS) $(XWIN_LIBS) $(MAIN_LIB) $(XSERVER_LIBS) $(XSERVER_SYS_LIBS) $(XWIN_SYS_LIBS)
 XWin_LDFLAGS = -mwindows -static