add makefiles for xlib and add toolkit option

allmakefiles.sh

@@ -46,6 +46,7 @@ base/src/Makefile
 base/src/motif/Makefile
 base/src/rhapsody/Makefile
 base/src/gtk/Makefile
+base/src/xlib/Makefile
 base/tests/Makefile
 build/package/rpm/mozilla.spec
 build/package/rpm/nspr-pthreads.spec
@@ -92,6 +93,7 @@ gfx/src/gtk/Makefile
 gfx/src/ps/Makefile
 gfx/src/motif/Makefile
 gfx/src/rhapsody/Makefile
+gfx/src/xlib/Makefile
 gfx/tests/Makefile
 htmlparser/Makefile
 htmlparser/robot/Makefile
@@ -305,6 +307,7 @@ widget/src/build/Makefile
 widget/src/motif/Makefile
 widget/src/rhapsody/Makefile
 widget/src/gtk/Makefile
+widget/src/xlib/Makefile
 widget/src/xpwidgets/Makefile
 widget/tests/Makefile
 widget/tests/scribble/Makefile

configure.in

@@ -443,12 +443,13 @@ MOZ_ARG_ENABLE_STRING(toolkit,
 [  --enable-toolkit=\$val   Enable \$val fe (defaults to gtk)],
   [if test "$enableval" = "motif" \
         -o "$enableval" = "gtk" \
+	-o "$enableval" = "xlib" \
         -o "$useRhapsody" ; then
      dnl nglayout only supports building with one toolkit,
      dnl so ignore everything after the first comma (",").
      MOZ_TOOLKIT=`echo "$enableval" | sed -e "s/,.*$//"`
    else
-     AC_MSG_ERROR(Toolkit must be either gtk or motif.)
+     AC_MSG_ERROR(Toolkit must be xlib, gtk or motif.)
    fi], 
   [if test "$useRhapsody" ; then
      MOZ_TOOLKIT="rhapsody"