Mega-kludgerific botch to fix x11/libX11 cross-build.  XXX WRONG!

Index: x11/libX11/Makefile
===================================================================
RCS file: /cvsroot/pkgsrc/x11/libX11/Makefile,v
retrieving revision 1.29
diff -p -u -r1.29 Makefile
--- x11/libX11/Makefile	29 Oct 2012 05:06:33 -0000	1.29
+++ x11/libX11/Makefile	23 Apr 2013 13:29:24 -0000
@@ -50,6 +50,21 @@ CONFIGURE_ENV+=		ac_cv_path_RAWCPP="${PR
 CONFIGURE_ENV+=		ac_cv_path_RAWCPP="cc -E -Uunix -"
 .endif
 
+.if !empty(USE_CROSS_COMPILE:M[yY][eE][sS])
+CONFIGURE_ENV+=		CC_FOR_BUILD=${NATIVE_CC:Q}
+
+SUBST_CLASSES+=			keysymdef
+SUBST_FILES.keysymdef+=		configure
+SUBST_FILES.keysymdef+=		src/Makefile.in
+SUBST_MESSAGE.keysymdef+=	Use keysymdef.h in the cross destdir.
+SUBST_STAGE.keysymdef+=		pre-configure
+SUBST_SED.keysymdef+=		-e s,'$$KEYSYMDEFDIR',${CROSS_DESTDIR:Q}'&',g
+
+# [TRC 20130328: Mega-kludgerific!  We need a better way to do this!
+# Also, does this obviate the need for the above substitution?]
+TOOL_DEPENDS+=	xproto-[0-9]*:../../x11/xproto
+.endif
+
 .include "../../x11/bigreqsproto/buildlink3.mk"
 .include "../../x11/inputproto/buildlink3.mk"
 .include "../../x11/kbproto/buildlink3.mk"