Add the #goo to allow use in C++.

Silence a few more warnings.
Strip down the mkfiles more.
Fix bug in X11 mouse handling, note groups.

src/mkone

@@ -2,43 +2,16 @@ PROG=$O.$TARG
 
 all:V:	$PROG
 
-$O.$TARG:	$OFILES $LIB
+$PROG:	$OFILES $LIB
 	$LD -o $target $prereq $LDFLAGS
 
-%.$O:	$HFILES		# don't combine with following %.$O rules
-
-%.$O:	%.c
-	$CC $CFLAGS $stem.c
-
-%.$O:	%.s
-	$AS $AFLAGS $stem.s
-
-y.tab.h y.tab.c:	$YFILES
-	$YACC $YFLAGS $prereq
-
+install:V: $TARG.install
 %.install:V:	$BIN/%
 
 $BIN/%:	$O.%
 	$INSTALL $O.$stem $BIN/$stem
 
-%.installall:V:
-	for (objtype in $CPUS)
-		mk $stem.install
+NUKEFILES=$NUKEFILES $BIN/$TARG
 
-install:V: $TARG.install
+<$PLAN9/src/mkcommon
 
-installall:V:
-	for(objtype in $CPUS)
-		mk $MKFLAGS install
-
-nuke:V:
-	rm -f *.[$OS] y.tab.? y.debug y.output [$OS].* *.acid $TARG $NUKEFILES
-
-clean:V:
-	rm -f *.[$OS] y.tab.? y.debug y.output [$OS].* $TARG $CLEANFILES
-
-%.clean:V:
-	rm -f $stem.[$OS] [$OS].$stem $stem.acid $stem
-
-%.acid: %.$O $HFILES
-	$CC $CFLAGS -a $stem.c >$target