Update Makefiles.

Makefile

@@ -1,17 +1,21 @@
 #
-# UPX toplevel Makefile - needs GNU make 3.80 or better
+# UPX toplevel Makefile - needs GNU make 3.81 or better
 #
 
 MAKEFLAGS += -rR
 .SUFFIXES:
 export SHELL = /bin/sh
 
+ifneq ($(findstring $(firstword $(MAKE_VERSION)),3.77 3.78 3.78.1 3.79 3.79.1 3.80),)
+$(error GNU make 3.81 or better is required)
+endif
+
 srcdir = .
 top_srcdir = .
--include $(top_srcdir)/Makevars.global ./Makevars.local
+include $(wildcard $(top_srcdir)/Makevars.global ./Makevars.local)
 
 
-# info: src/stub needs GNU make 3.81 and special build tools
+# info: src/stub needs special build tools
 BUILD_STUB = 0
 ifneq ($(wildcard $(HOME)/local/bin/bin-upx/.),)
 BUILD_STUB = 1
@@ -19,9 +23,6 @@ endif
 ifneq ($(wildcard $(HOME)/bin/bin-upx/.),)
 BUILD_STUB = 1
 endif
-ifneq ($(findstring $(firstword $(MAKE_VERSION)),3.79 3.79.1 3.80),)
-BUILD_STUB = 0
-endif
 
 
 default:

src/Makefile

@@ -1,5 +1,5 @@
 #
-# UPX Makefile - needs GNU make 3.80 or better
+# UPX Makefile - needs GNU make 3.81 or better
 #
 
 MAKEFLAGS += -rR
@@ -7,6 +7,10 @@ MAKEFLAGS += -rR
 export SHELL = /bin/sh
 override e = $($1) $(EXTRA_$1) $(upx_$1) $($(basename $(notdir $@)).$1)
 
+ifneq ($(findstring $(firstword $(MAKE_VERSION)),3.77 3.78 3.78.1 3.79 3.79.1 3.80),)
+$(error GNU make 3.81 or better is required)
+endif
+
 ifndef srcdir
 srcdir := $(dir $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST)))
 srcdir := $(shell echo '$(srcdir)' | sed 's,/*$$,,')
@@ -14,7 +18,7 @@ endif
 ifndef top_srcdir
 top_srcdir := $(srcdir)/..
 endif
--include $(top_srcdir)/Makevars.global ./Makevars.local
+include $(wildcard $(top_srcdir)/Makevars.global ./Makevars.local)
 ifneq ($(srcdir),.)
 ##$(info Info: using VPATH . $(srcdir))
 VPATH := . $(srcdir)
@@ -58,7 +62,7 @@ INCLUDES += -I$(UPX_LZMADIR)
 endif
 
 
-all: .depend upx$(exeext)
+all: upx$(exeext) | .depend
 .DELETE_ON_ERROR: .depend upx$(exeext) $(upx_OBJECTS)
 
 upx$(exeext): $(upx_OBJECTS) $(upx_DEPENDENCIES)
@@ -66,13 +70,14 @@ upx$(exeext): $(upx_OBJECTS) $(upx_DEPENDENCIES)
 	$(strip $(CXXLD) $(call e,CPPFLAGS) $(call e,CXXFLAGS) $(call e,LDFLAGS) -o $@ $(upx_OBJECTS) $(call e,LDADD) $(call e,LIBS))
 	$($(notdir $@).POST_LINK_STEP)
 
-%.o : %.cpp .depend
+%.o : %.cpp | .depend
 	$(strip $(CXX) $(call e,CPPFLAGS) $(call e,CXXFLAGS) -o $@ -c $<)
 
 .depend: $(wildcard $(srcdir)/*.cpp) $(wildcard $(srcdir)/*.h) $(MAKEFILE_LIST)
 	@rm -f $@
 ifeq ($(USE_GNUC),1)
-	$(strip $(CXX) $(call e,CPPFLAGS) -MM) $(filter %.cpp,$^) > $@
+	@echo "Updating $@"
+	@$(strip $(CXX) $(call e,CPPFLAGS) -MM) $(filter %.cpp,$^) > $@
 else
 	touch $@
 endif
@@ -91,5 +96,6 @@ endif
 mostlyclean clean distclean maintainer-clean:
 	rm -f *.d *.map *.o *.obj *.res .depend upx.exe upx.out upx.ttp upx$(exeext)
 
-include $(wildcard .depend)
 .PHONY: all mostlyclean clean distclean maintainer-clean
+
+-include .depend

src/stub/Makefile

@@ -18,7 +18,7 @@ empty :=
 space := $(empty) $(empty)
 tab   := $(empty)	$(empty)
 
-ifneq ($(findstring $(firstword $(MAKE_VERSION)),3.79 3.79.1 3.80),)
+ifneq ($(findstring $(firstword $(MAKE_VERSION)),3.77 3.78 3.78.1 3.79 3.79.1 3.80),)
 $(error GNU make 3.81 or better is required)
 endif
 
@@ -29,7 +29,7 @@ endif
 ifndef top_srcdir
 top_srcdir := $(srcdir)/../..
 endif
--include $(top_srcdir)/Makevars.global ./Makevars.local
+include $(wildcard $(top_srcdir)/Makevars.global ./Makevars.local)
 
 # update $PATH for our special stub build tools
 ifneq ($(wildcard $(HOME)/local/bin/bin-upx/.),)

src/stub/src/arch/amd64/Makefile.extra

@@ -8,7 +8,7 @@ __dir_list  += ../../../../../.. ../../../../../../.. ../../../../../../../..
 __dir_search = $(firstword $(foreach v,$1,$(if $(wildcard $v/$2),$v)) $3)
 top_srcdir := $(call __dir_search,$(__dir_list),src/bele.h,NOT_FOUND)
 endif
--include $(top_srcdir)/Makevars.global ./Makevars.local
+include $(wildcard $(top_srcdir)/Makevars.global ./Makevars.local)
 vpath %.c $(top_srcdir)/src/stub/src/c
 
 STUBS =

src/stub/src/arch/arm/v4a/Makefile.extra

@@ -8,7 +8,7 @@ __dir_list  += ../../../../../.. ../../../../../../.. ../../../../../../../..
 __dir_search = $(firstword $(foreach v,$1,$(if $(wildcard $v/$2),$v)) $3)
 top_srcdir := $(call __dir_search,$(__dir_list),src/bele.h,NOT_FOUND)
 endif
--include $(top_srcdir)/Makevars.global ./Makevars.local
+include $(wildcard $(top_srcdir)/Makevars.global ./Makevars.local)
 vpath %.c $(top_srcdir)/src/stub/src/c
 
 STUBS =

src/stub/src/arch/arm/v4t/Makefile.extra

@@ -8,7 +8,7 @@ __dir_list  += ../../../../../.. ../../../../../../.. ../../../../../../../..
 __dir_search = $(firstword $(foreach v,$1,$(if $(wildcard $v/$2),$v)) $3)
 top_srcdir := $(call __dir_search,$(__dir_list),src/bele.h,NOT_FOUND)
 endif
--include $(top_srcdir)/Makevars.global ./Makevars.local
+include $(wildcard $(top_srcdir)/Makevars.global ./Makevars.local)
 vpath %.c $(top_srcdir)/src/stub/src/c
 
 STUBS =

src/stub/src/arch/i086/Makefile.extra

@@ -14,7 +14,7 @@ __dir_list  += ../../../../../.. ../../../../../../.. ../../../../../../../..
 __dir_search = $(firstword $(foreach v,$1,$(if $(wildcard $v/$2),$v)) $3)
 top_srcdir := $(call __dir_search,$(__dir_list),src/bele.h,NOT_FOUND)
 endif
--include $(top_srcdir)/Makevars.global ./Makevars.local
+include $(wildcard $(top_srcdir)/Makevars.global ./Makevars.local)
 vpath %.c $(top_srcdir)/src/stub/src/c
 
 STUBS =

src/stub/src/arch/i386/Makefile.extra

@@ -8,7 +8,7 @@ __dir_list  += ../../../../../.. ../../../../../../.. ../../../../../../../..
 __dir_search = $(firstword $(foreach v,$1,$(if $(wildcard $v/$2),$v)) $3)
 top_srcdir := $(call __dir_search,$(__dir_list),src/bele.h,NOT_FOUND)
 endif
--include $(top_srcdir)/Makevars.global ./Makevars.local
+include $(wildcard $(top_srcdir)/Makevars.global ./Makevars.local)
 vpath %.c $(top_srcdir)/src/stub/src/c
 
 STUBS =

src/stub/src/arch/m68k/m68000/Makefile.extra

@@ -8,7 +8,7 @@ __dir_list  += ../../../../../.. ../../../../../../.. ../../../../../../../..
 __dir_search = $(firstword $(foreach v,$1,$(if $(wildcard $v/$2),$v)) $3)
 top_srcdir := $(call __dir_search,$(__dir_list),src/bele.h,NOT_FOUND)
 endif
--include $(top_srcdir)/Makevars.global ./Makevars.local
+include $(wildcard $(top_srcdir)/Makevars.global ./Makevars.local)
 vpath %.c $(top_srcdir)/src/stub/src/c
 
 STUBS =

src/stub/src/arch/m68k/m68020/Makefile.extra

@@ -8,7 +8,7 @@ __dir_list  += ../../../../../.. ../../../../../../.. ../../../../../../../..
 __dir_search = $(firstword $(foreach v,$1,$(if $(wildcard $v/$2),$v)) $3)
 top_srcdir := $(call __dir_search,$(__dir_list),src/bele.h,NOT_FOUND)
 endif
--include $(top_srcdir)/Makevars.global ./Makevars.local
+include $(wildcard $(top_srcdir)/Makevars.global ./Makevars.local)
 vpath %.c $(top_srcdir)/src/stub/src/c
 
 STUBS =

src/stub/src/arch/mips/mipsel.r3000/Makefile.extra

@@ -8,7 +8,7 @@ __dir_list  += ../../../../../.. ../../../../../../.. ../../../../../../../..
 __dir_search = $(firstword $(foreach v,$1,$(if $(wildcard $v/$2),$v)) $3)
 top_srcdir := $(call __dir_search,$(__dir_list),src/bele.h,NOT_FOUND)
 endif
--include $(top_srcdir)/Makevars.global ./Makevars.local
+include $(wildcard $(top_srcdir)/Makevars.global ./Makevars.local)
 vpath %.c $(top_srcdir)/src/stub/src/c
 
 STUBS =

src/stub/src/arch/powerpc/32/Makefile.extra

@@ -8,7 +8,7 @@ __dir_list  += ../../../../../.. ../../../../../../.. ../../../../../../../..
 __dir_search = $(firstword $(foreach v,$1,$(if $(wildcard $v/$2),$v)) $3)
 top_srcdir := $(call __dir_search,$(__dir_list),src/bele.h,NOT_FOUND)
 endif
--include $(top_srcdir)/Makevars.global ./Makevars.local
+include $(wildcard $(top_srcdir)/Makevars.global ./Makevars.local)
 vpath %.c $(top_srcdir)/src/stub/src/c
 
 STUBS =