follow-up to Makefile out-of-date checking

linux.370 and macOS.370 pass the name of the hints file
and the list of included files, that they use, to Makefile.check.

The name of the hints file is in variable HINTSFILE, the
definition of which is now inserted by setup.sh

The list of hints include files is in variable HINTSINCLFILES.

sys/unix/hints/linux.370

@@ -20,7 +20,21 @@
 #        multiw-1.370 contains sections 1 to 2
 #-INCLUDE multiw-1.370
 
+HINTSVERSION := 370
+
+ifdef MAKEFILE_TOP
+ifeq ($(MAKELEVEL),0)
 PRECHECK+=checkmakefiles
+HINTSVERSION := 370
+# all files included from this hints file get listed
+# in HINTSINCLNAMES (without suffix and without a path)
+HINTSINCLNAMES := compiler cross-pre cross-post \
+		gbdates-pre gbdates-post \
+		multiw-1 multiw-2 multiw-3 \
+		multisnd1-pre multisnd2-pre multisnd-post
+HINTSINCLFILES := $(addsuffix .$(HINTSVERSION), $(HINTSINCLNAMES))
+endif
+endif
 
 ifndef LIBXPM
 LIBXPM= -L/opt/X11/lib -lXpm
@@ -359,9 +373,14 @@ GAMEPERM = 0755
 #-INCLUDE multisnd-post.370
 #
 
+ifdef MAKEFILE_TOP
+ifeq ($(MAKELEVEL),0)
 .PHONY: checkmakefiles
 checkmakefiles:
-	( $(MAKE) -f sys/unix/Makefile.check )
+	@$(MAKE) -f sys/unix/Makefile.check \
+		HINTSFILE="$(HINTSFILE)" HINTSINCLFILES="$(HINTSINCLFILES)"
+endif
+endif
 
 ifdef WANT_LIBNH
 $(TARGETPFX)libnh.a: $(HOBJ) $(LIBNHSYSOBJ) ../lib/lua/liblua.a