From 1cacc9ab8bf10e60b3ed93d7a10b070c4cbc6c9f Mon Sep 17 00:00:00 2001 From: Sam Ravnborg Date: Thu, 6 Dec 2007 22:20:11 +0100 Subject: kbuild: fix building with redirected output. Jan Altenberg reported that building with redirected input like this failed: make O=dir oldconfig bzImage < /dev/null The problem were caused by a make silentoldconfig being run before oldconfig and with a non-recent .config the build failed because silentoldconfig requires non-redirected stdin. Silentoldconfig was run as a side-effect of having the top-level Makefile re-made by make. Introducing an empty rule for the top-level Makefile (and Kbuild.include) fixed the issue. Signed-off-by: Sam Ravnborg --- Makefile | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) (limited to 'Makefile') diff --git a/Makefile b/Makefile index 92dc3cb5f43d..a5252f451bfd 100644 --- a/Makefile +++ b/Makefile @@ -108,6 +108,9 @@ endif PHONY := _all _all: +# Cancel implicit rules on top Makefile +$(CURDIR)/Makefile Makefile: ; + ifneq ($(KBUILD_OUTPUT),) # Invoke a second make in the output directory, passing relevant variables # check that the output directory actually exists @@ -121,7 +124,7 @@ $(if $(filter-out $(KBUILD_OUTPUT),$(shell /bin/pwd)),, \ PHONY += $(MAKECMDGOALS) sub-make -$(filter-out _all sub-make,$(MAKECMDGOALS)) _all: sub-make +$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make $(Q)@: sub-make: FORCE @@ -291,7 +294,8 @@ export quiet Q KBUILD_VERBOSE # Look for make include files relative to root of kernel src MAKEFLAGS += --include-dir=$(srctree) -# We need some generic definitions. +# We need some generic definitions (do not try to remake the file). +$(srctree)/scripts/Kbuild.include: ; include $(srctree)/scripts/Kbuild.include # Make variables (CC, etc...) @@ -1560,9 +1564,6 @@ endif # skip-makefile PHONY += FORCE FORCE: -# Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes. -Makefile: ; - # Declare the contents of the .PHONY variable as phony. We keep that # information in a variable se we can use it in if_changed and friends. .PHONY: $(PHONY) -- cgit v1.2.3-58-ga151