Split system dependent commands to clean modular-gc

common.mk

@@ -1953,12 +1953,10 @@ modular-gc: probes.h modular-gc-precheck
 	$(CHDIR) gc/$(MODULAR_GC) && $(exec) $(MAKE) TARGET_SO_DIR=./
 	$(CP) gc/$(MODULAR_GC)/librubygc.$(MODULAR_GC).$(DLEXT) $(modular_gc_dir)
 
-clean-modular-gc:
-	- find gc -type d -mindepth 1 -maxdepth 1 -exec sh -c '$(CHDIR) "{}" && $(MAKE) TARGET_SO_DIR=./ clean || $(NULLCMD)' \; || $(NULLCMD)
-	-$(Q) $(RMDIR) gc
-distclean-modular-gc: clean-modular-gc
-	- find gc -type d -mindepth 1 -maxdepth 1 -exec sh -c '$(CHDIR) "{}" && $(MAKE) TARGET_SO_DIR=./ distclean || $(NULLCMD)' \; || $(NULLCMD)
-	- find gc -type d -mindepth 1 -maxdepth 1 -exec sh -c '$(RMDIR) "{}"' \; || $(NULLCMD)
+clean-modular-gc: gc/clean
+distclean-modular-gc: gc/distclean
+realclean-modular-gc: gc/realclean
+distclean-modular-gc realclean-modular-gc:
 	-$(Q) $(RMDIR) gc
 
 help: PHONY

template/Makefile.in

@@ -567,6 +567,12 @@ ext/distclean ext/realclean .bundle/distclean .bundle/realclean::
 .bundle/realclean::
 	@$(RMALL) $(tooldir)/bunlder/*.lock $(srcdir)/.bundle
 
+gc/clean gc/distclean gc/realclean::
+	- for gc in gc/*/; do ($(CHDIR) $$gc && exec $(MAKE) TARGET_SO_DIR=./ $(@F)); done || $(NULLCMD)
+
+gc/distclean gc/realclean::
+	- for gc in gc/*/; do $(RMDIR) $$gc; done || $(NULLCMD)
+
 clean-enc distclean-enc realclean-enc:
 	@test -f "$(ENC_MK)" || exit 0; \
 	echo $(@:-enc=ing) encodings; \

win32/Makefile.sub

@@ -1295,6 +1295,11 @@ ext/distclean gems/distclean ext/realclean gems/realclean::
 		do $(Q)(del %I & rmdir %~dpI)) || @
 		-$(Q)rmdir $(@D) 2> nul || @
 
+gc/clean gc/distclean gc/realclean::
+	- for /D %G in (gc\*) do (pushd %G && $(MAKE) TARGET_SO_DIR=./ $(@F) & popd) || $(NULLCMD)
+gc/distclean gc/realclean::
+	- for /D %G in (gc\*) do ($(RMDIR) %G) || $(NULLCMD)
+
 clean-enc distclean-enc realclean-enc:
 !if exist($(ENC_MK))
 	$(ECHO) $(@:-enc=ing) encodings