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@@ -108,6 +108,9 @@ endif
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PHONY := _all
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_all:
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+# Cancel implicit rules on top Makefile
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+$(CURDIR)/Makefile Makefile: ;
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+
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ifneq ($(KBUILD_OUTPUT),)
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# Invoke a second make in the output directory, passing relevant variables
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# check that the output directory actually exists
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@@ -115,13 +118,10 @@ saved-output := $(KBUILD_OUTPUT)
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KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
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$(if $(KBUILD_OUTPUT),, \
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$(error output directory "$(saved-output)" does not exist))
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-# Check that OUTPUT directory is not the same as where we have kernel src
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-$(if $(filter-out $(KBUILD_OUTPUT),$(shell /bin/pwd)),, \
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- $(error Output directory (O=...) specifies kernel src dir))
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PHONY += $(MAKECMDGOALS) sub-make
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-$(filter-out _all sub-make,$(MAKECMDGOALS)) _all: sub-make
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+$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
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$(Q)@:
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sub-make: FORCE
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@@ -291,7 +291,8 @@ export quiet Q KBUILD_VERBOSE
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# Look for make include files relative to root of kernel src
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MAKEFLAGS += --include-dir=$(srctree)
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-# We need some generic definitions.
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+# We need some generic definitions (do not try to remake the file).
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+$(srctree)/scripts/Kbuild.include: ;
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include $(srctree)/scripts/Kbuild.include
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# Make variables (CC, etc...)
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@@ -1560,9 +1561,6 @@ endif # skip-makefile
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PHONY += FORCE
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FORCE:
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-# Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
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-Makefile: ;
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-
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# Declare the contents of the .PHONY variable as phony. We keep that
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# information in a variable se we can use it in if_changed and friends.
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.PHONY: $(PHONY)
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Linus Torvalds