[AD] make info with info about X11

[Elias Pschernig <elias@xxxxxxxxxx>]

Not sure we want this (since the aclocal.m4 gets more and more complex),
but maybe for reports like "HW cursors don't work" or "error about VT
not found", it may be useful. It adds a line to "make info" like:

X11 support: disabled

or

X11 support: enabled with: Xext Xpm Xcursor XShm XF86VidMode XDGA XIM

-- 
Elias Pschernig

Index: configure.in
===================================================================
RCS file: /cvsroot/alleg/allegro/configure.in,v
retrieving revision 1.87
diff -u -p -r1.87 configure.in
--- configure.in	13 Apr 2005 20:21:08 -0000	1.87
+++ configure.in	21 Apr 2005 16:23:25 -0000
@@ -791,6 +791,7 @@ cat > makefile.info << EOF
  Generated libraries:$_libraries
  Compiled programs: $_programs
  $_warnmode
+ $_x11
 
 EOF
 
Index: aclocal.m4
===================================================================
RCS file: /cvsroot/alleg/allegro/aclocal.m4,v
retrieving revision 1.76
diff -u -p -r1.76 aclocal.m4
--- aclocal.m4	13 Apr 2005 20:21:07 -0000	1.76
+++ aclocal.m4	21 Apr 2005 16:23:25 -0000
@@ -253,6 +253,7 @@ test "X$enableval" != "Xno" && allegro_e
 allegro_enable_xim=yes)
 
 dnl Process "--with[out]-x", "--x-includes" and "--x-libraries" options.
+_x11="X11 support: disabled"
 AC_PATH_X
 if test -z "$no_x"; then
   allegro_support_xwindows=yes
@@ -266,18 +267,22 @@ if test -z "$no_x"; then
     ALLEGRO_XWINDOWS_LIBDIR="$x_libraries"
   fi
   LIBS="-lX11 $LIBS"
+  _x11="X11 support: enabled"
+  _x11ext=""
 
   dnl Test for Xext library.
   AC_CHECK_LIB(Xext, XMissingExtension,
-    [LIBS="-lXext $LIBS"])
+    [_x11ext="$_x11ext Xext"
+    LIBS="-lXext $LIBS"])
 
   dnl Test for Xpm library.
   AC_CHECK_HEADER(X11/xpm.h, AC_CHECK_LIB(Xpm, XpmCreatePixmapFromData,
     [LIBS="-lXpm $LIBS"
+    _x11ext="$_x11ext Xpm"
     AC_DEFINE(ALLEGRO_XWINDOWS_WITH_XPM,1,[Define if xpm bitmap support is available.])
     ])
    )
-   
+
   dnl Test for Xcursor library.
   if test -n "$allegro_enable_xwin_xcursor"; then
     AC_CHECK_LIB(Xcursor, XcursorImageCreate,
@@ -288,6 +293,7 @@ if test -z "$no_x"; then
                       XcursorSupportsARGB(0);
                      ],
         [LIBS="-lXcursor $LIBS"
+        _x11ext="$_x11ext Xcursor"
         AC_DEFINE(ALLEGRO_XWINDOWS_WITH_XCURSOR,1,[Define if XCursor ARGB extension is available.])
         ])
      )
@@ -296,13 +302,15 @@ if test -z "$no_x"; then
   dnl Test for SHM extension.
   if test -n "$allegro_enable_xwin_shm"; then
     AC_CHECK_LIB(Xext, XShmQueryExtension,
-      [AC_DEFINE(ALLEGRO_XWINDOWS_WITH_SHM,1,[Define if MIT-SHM extension is supported.])])
+      [_x11ext="$_x11ext XShm"
+      AC_DEFINE(ALLEGRO_XWINDOWS_WITH_SHM,1,[Define if MIT-SHM extension is supported.])])
   fi
 
   dnl Test for XF86VidMode extension.
   if test -n "$allegro_enable_xwin_xf86vidmode"; then
     AC_CHECK_LIB(Xxf86vm, XF86VidModeQueryExtension,
       [LIBS="-lXxf86vm $LIBS"
+      _x11ext="$_x11ext XF86VidMode"
       AC_DEFINE(ALLEGRO_XWINDOWS_WITH_XF86VIDMODE,1,[Define if XF86VidMode extension is supported.])])
   fi
 
@@ -313,13 +321,19 @@ if test -z "$no_x"; then
       if test -z "$allegro_support_modules"; then
         LIBS="-lXxf86dga $LIBS"
       fi
+      _x11ext="$_x11ext XDGA"
       AC_DEFINE(ALLEGRO_XWINDOWS_WITH_XF86DGA2,1,[Define if DGA version 2.0 or newer is supported])])
   fi
 
   dnl Test for XIM support.
   if test -n "$allegro_enable_xim"; then
     AC_CHECK_LIB(X11, XOpenIM,
-      [AC_DEFINE(ALLEGRO_USE_XIM,1,[Define if XIM extension is supported.])])
+      [_x11ext="$_x11ext XIM"
+      AC_DEFINE(ALLEGRO_USE_XIM,1,[Define if XIM extension is supported.])])
+  fi
+
+  if test -n "$_x11ext"; then
+    _x11="$_x11 with:$_x11ext"
   fi
 
 fi