common.mk: remove explicit MFLAGS

It is unnecessary to pass MFLAGS to sub-makes, because it is
evaluated implicitly if set by make.  GNU make 4.2 sets both of
-jN and --jobserver-auth (or --jobserver-fds in older versions)
options which conflict.  And it is useless for command line macros
since Microsoft NMAKE does not set them.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57489 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

Makefile.in

@@ -423,7 +423,7 @@ clean-ext distclean-ext realclean-ext::
 	cd ..; \
 	for dir do \
 	    echo $(@:-ext=)ing "$$dir"; \
-	    (cd "ext/$$dir" && exec $(MAKE) $(MFLAGS) $(@:-ext=)) && \
+	    (cd "ext/$$dir" && exec $(MAKE) $(@:-ext=)) && \
 	    case "$@" in \
 	    *distclean-ext*|*realclean-ext*) \
 		$(RMDIRS) "ext/$$dir" 2> /dev/null || true;; \

common.mk

@@ -66,7 +66,7 @@ EXTSOLIBS     =
 MINIOBJS      = $(ARCHMINIOBJS) miniinit.$(OBJEXT) dmyext.$(OBJEXT) miniprelude.$(OBJEXT)
 ENC_MK        = enc.mk
 MAKE_ENC      = -f $(ENC_MK) V="$(V)" UNICODE_HDR_DIR="$(UNICODE_HDR_DIR)" \
-		RUBY="$(MINIRUBY)" MINIRUBY="$(MINIRUBY)" $(MFLAGS)
+		RUBY="$(MINIRUBY)" MINIRUBY="$(MINIRUBY)"
 
 COMMONOBJS    = array.$(OBJEXT) \
 		bignum.$(OBJEXT) \
@@ -227,7 +227,7 @@ ext/configure-ext.mk: $(PREP) all-incs $(MKFILES) $(RBCONFIG) $(LIBRUBY)
 configure-ext: $(EXTS_MK)
 
 build-ext: $(EXTS_MK)
-	$(Q)$(MAKE) -f $(EXTS_MK) $(MFLAGS) libdir="$(libdir)" LIBRUBY_EXTS=$(LIBRUBY_EXTS) \
+	$(Q)$(MAKE) -f $(EXTS_MK) libdir="$(libdir)" LIBRUBY_EXTS=$(LIBRUBY_EXTS) \
 	    EXTENCS="$(ENCOBJS)" UPDATE_LIBRARIES=no $(EXTSTATIC)
 
 ext/extinit.c: $(srcdir)/template/extinit.c.tmpl
@@ -244,7 +244,7 @@ objs: $(ALLOBJS)
 
 GORUBY = go$(RUBY_INSTALL_NAME)
 golf: $(LIBRUBY) $(GOLFOBJS) PHONY
-	$(Q) $(MAKE) $(MFLAGS) MAINOBJ="$(GOLFOBJS)" PROGRAM=$(GORUBY)$(EXEEXT) program
+	$(Q) $(MAKE) MAINOBJ="$(GOLFOBJS)" PROGRAM=$(GORUBY)$(EXEEXT) program
 capi: $(CAPIOUT)/.timestamp PHONY
 
 $(CAPIOUT)/.timestamp: Doxyfile $(PREP)
@@ -922,18 +922,18 @@ $(srcdir)/ext/ripper/ripper.c: $(srcdir)/parse.y id.h
 	$(ECHO) generating $@
 	$(Q) $(CHDIR) $(@D) && \
 	sed /AUTOGENERATED/q depend | \
-	$(exec) $(MAKE) -f - $(MFLAGS) \
+	$(exec) $(MAKE) -f - \
 		Q=$(Q) ECHO=$(ECHO) RM="$(RM)" top_srcdir=../.. srcdir=. VPATH="$(PWD)" \
 		RUBY="$(BASERUBY)" PATH_SEPARATOR="$(PATH_SEPARATOR)"
 
 $(srcdir)/ext/json/parser/parser.c: $(srcdir)/ext/json/parser/parser.rl
 	$(ECHO) generating $@
-	$(Q) $(CHDIR) $(@D) && $(exec) $(MAKE) -f prereq.mk $(MFLAGS) \
+	$(Q) $(CHDIR) $(@D) && $(exec) $(MAKE) -f prereq.mk \
 		Q=$(Q) ECHO=$(ECHO) top_srcdir=../../.. srcdir=. VPATH=../../.. BASERUBY="$(BASERUBY)"
 
 $(srcdir)/ext/date/zonetab.h: $(srcdir)/ext/date/zonetab.list
 	$(ECHO) generating $@
-	$(Q) $(CHDIR) $(@D) && $(exec) $(MAKE) -f prereq.mk $(MFLAGS) \
+	$(Q) $(CHDIR) $(@D) && $(exec) $(MAKE) -f prereq.mk \
 		Q=$(Q) ECHO=$(ECHO) top_srcdir=../.. srcdir=. VPATH=../.. BASERUBY="$(BASERUBY)"
 
 $(srcdir)/ext/rbconfig/sizeof/sizes.c: $(srcdir)/ext/rbconfig/sizeof/depend \
@@ -941,7 +941,7 @@ $(srcdir)/ext/rbconfig/sizeof/sizes.c: $(srcdir)/ext/rbconfig/sizeof/depend \
 	$(ECHO) generating $@
 	$(Q) $(CHDIR) $(@D) && \
 	sed '/AUTOGENERATED/q' depend | \
-	$(exec) $(MAKE) -f - $(MFLAGS) \
+	$(exec) $(MAKE) -f - \
 		Q=$(Q) ECHO=$(ECHO) top_srcdir=../../.. srcdir=. VPATH=../../.. RUBY="$(BASERUBY)" $(@F)
 
 $(srcdir)/ext/rbconfig/sizeof/limits.c: $(srcdir)/ext/rbconfig/sizeof/depend \
@@ -949,13 +949,13 @@ $(srcdir)/ext/rbconfig/sizeof/limits.c: $(srcdir)/ext/rbconfig/sizeof/depend \
 	$(ECHO) generating $@
 	$(Q) $(CHDIR) $(@D) && \
 	sed '/AUTOGENERATED/q' depend | \
-	$(exec) $(MAKE) -f - $(MFLAGS) \
+	$(exec) $(MAKE) -f - \
 		Q=$(Q) ECHO=$(ECHO) top_srcdir=../../.. srcdir=. VPATH=../../.. RUBY="$(BASERUBY)" $(@F)
 
 $(srcdir)/ext/socket/constdefs.c: $(srcdir)/ext/socket/depend
 	$(Q) $(CHDIR) $(@D) && \
 	sed '/AUTOGENERATED/q' depend | \
-	$(exec) $(MAKE) -f - $(MFLAGS) \
+	$(exec) $(MAKE) -f - \
 		Q=$(Q) ECHO=$(ECHO) top_srcdir=../.. srcdir=. VPATH=../.. RUBY="$(BASERUBY)"
 
 ##
@@ -1029,10 +1029,10 @@ dist:
 up:: update-remote
 
 up::
-	-$(Q)$(MAKE) $(MFLAGS) Q=$(Q) REVISION_FORCE=PHONY "$(REVISION_H)"
+	-$(Q)$(MAKE) Q=$(Q) REVISION_FORCE=PHONY "$(REVISION_H)"
 
 up::
-	-$(Q)$(MAKE) $(MFLAGS) Q=$(Q) after-update
+	-$(Q)$(MAKE) Q=$(Q) after-update
 
 after-update:: extract-extlibs
 
@@ -1115,7 +1115,7 @@ $(UNICODE_SRC_DATA_DIR)/$(ALWAYS_UPDATE_UNICODE:yes=.unicode-tables.time): $(UNI
 
 $(UNICODE_SRC_DATA_DIR)/.unicode-tables.time: $(srcdir)/tool/generic_erb.rb \
 		$(srcdir)/template/unicode_norm_gen.tmpl
-	$(Q) $(ALWAYS_UPDATE_UNICODE:yes=exit &&) $(MAKE) $(MFLAGS) Q=$(Q) UNICODE_VERSION=$(UNICODE_VERSION) update-unicode
+	$(Q) $(ALWAYS_UPDATE_UNICODE:yes=exit &&) $(MAKE) Q=$(Q) UNICODE_VERSION=$(UNICODE_VERSION) update-unicode
 	$(Q) $(BASERUBY) $(srcdir)/tool/generic_erb.rb \
 		-c -t$@ -o $(srcdir)/lib/unicode_normalize/tables.rb \
 		-I $(srcdir) \
@@ -1125,7 +1125,7 @@ $(UNICODE_SRC_DATA_DIR)/.unicode-tables.time: $(srcdir)/tool/generic_erb.rb \
 # UPDATE_NAME2CTYPE=    : toplevel
 # UPDATE_NAME2CTYPE=yes : sub-make to update name2ctype.h
 $(UNICODE_HDR_DIR)/$(UPDATE_NAME2CTYPE:yes=.ignore.)name2ctype.h:
-	$(Q) $(MAKE) $(MFLAGS) Q=$(Q) UPDATE_NAME2CTYPE=yes UNICODE_VERSION=$(UNICODE_VERSION) $@
+	$(Q) $(MAKE) Q=$(Q) UPDATE_NAME2CTYPE=yes UNICODE_VERSION=$(UNICODE_VERSION) $@
 
 $(UNICODE_HDR_DIR)/$(UPDATE_NAME2CTYPE:yes=name2ctype.h): \
 		$(UNICODE_SRC_DATA_DIR)/UnicodeData.txt \
@@ -1144,7 +1144,7 @@ $(UNICODE_HDR_DIR)/$(ALWAYS_UPDATE_UNICODE:yes=casefold.h): \
 		$(UNICODE_SRC_DATA_DIR)/CaseFolding.txt
 
 $(UNICODE_HDR_DIR)/casefold.h: $(srcdir)/enc/unicode/case-folding.rb
-	$(Q) $(ALWAYS_UPDATE_UNICODE:yes=exit &&) $(MAKE) $(MFLAGS) Q=$(Q) UNICODE_VERSION=$(UNICODE_VERSION) update-unicode
+	$(Q) $(ALWAYS_UPDATE_UNICODE:yes=exit &&) $(MAKE) Q=$(Q) UNICODE_VERSION=$(UNICODE_VERSION) update-unicode
 	$(MAKEDIRS) $(@D)
 	$(Q) $(BASERUBY) $(srcdir)/enc/unicode/case-folding.rb \
 		--output-file=$@ \

template/exts.mk.tmpl

@@ -111,17 +111,17 @@ distclean:
 
 % rubies.each do |ruby|
 <%= ruby %>:
-	$(Q)$(MAKE) $(MFLAGS) $(SUBMAKEOPTS) $@
+	$(Q)$(MAKE) $(SUBMAKEOPTS) $@
 % end
 
 libencs:
 	$(Q)$(MAKE) -f enc.mk V=$(V) $@
 ext/extinit.<%=objext%>:
-	$(Q)$(MAKE) $(MFLAGS) V=$(V) EXTINITS="$(EXTINITS)" $@
+	$(Q)$(MAKE) V=$(V) EXTINITS="$(EXTINITS)" $@
 
 % targets.product(macros["extensions"].map {|e|e.chomp("/.")}) do |t, e|
 <%=e%>/<%=t%>:
-	$(Q)<%= submake %> $(MFLAGS) V=$(V) $(@F)
+	$(Q)<%= submake %> V=$(V) $(@F)
 % end
 
 extso: