Add some autoconf warnings

[Francois Gouget]

I thought I had sent this patch months ago but apparently not. The idea 
is to warn the user when some often used libraries are missing and is 
based on the warnings issued for bad Mesa or X configurations. Let me 
know if the range of checks should be expanded or reduced or otherwise 
tweaked.

After applying this patch configure needs to be regenerated (duh).


Changelog:

  * configure.ac

    Warn the user when OpenGL, OSS, ALSA, ARTS or ICU are missing.


-- 
Francois Gouget         fgouget at free.fr        http://fgouget.free.fr/
                      Avoid the Gates of Hell - use Linux.
-------------- next part --------------
Index: configure.ac
===================================================================
RCS file: /var/cvs/wine/configure.ac,v
retrieving revision 1.343
diff -u -p -r1.343 configure.ac
--- configure.ac	5 Mar 2005 11:19:14 -0000	1.343
+++ configure.ac	18 Mar 2005 12:31:11 -0000
@@ -1762,6 +1762,8 @@ tools/wrc/Makefile])
 
 AC_OUTPUT
 
+echo
+echo "Notes:"
 if test "$have_x" = "no"
 then
   echo
@@ -1777,6 +1779,10 @@ then
   echo "*** Warning: old Mesa headers detected. Wine will be built without Direct3D"
   echo "*** support. Consider upgrading your Mesa libraries (http://www.mesa3d.org/)."
 fi
+if test "$with_opengl" != "no" -a -z "$OPENGL_LIBS"
+then
+  echo "*** OpenGL not detected. Building without OpenGL support."
+fi
 
 if test "$wine_cv_msg_freetype" = "yes"
 then
@@ -1787,6 +1793,26 @@ then
   echo "*** enable Wine to use TrueType fonts."
 fi
 
+if test "$ac_cv_c_opensoundsystem" = "no"
+then
+  echo "*** OSS not detected. The wineoss.drv.so sound driver will be a dummy."
+fi
+
+if test -z "$ALSALIBS"
+then
+  echo "*** Alsa not detected. The winealsa.drv.so sound driver will be a dummy."
+fi
+
+if test -z "$ARTSC_LIBS"
+then
+  echo "*** Alsa not detected. The winearts.drv.so sound driver will be a dummy."
+fi
+
+if test -z "$ICULIBS"
+then
+  echo "*** ICU not detected. Building without bi-directional text support."
+fi
+
 echo
 echo "Configure finished.  Do '${ac_make} depend && ${ac_make}' to compile Wine."
 echo