From c4e6fff1ae5729c2af159008b13fca39fbbac70e Mon Sep 17 00:00:00 2001 From: Cao jin Date: Fri, 30 Jun 2017 10:45:43 +0800 Subject: kbuild: improve comments on KBUILD_SRC Original comments is confusing on "OBJ directory", make it clear. Bonus: move comments close to what it wants to comment. Signed-off-by: Cao jin Signed-off-by: Masahiro Yamada --- Makefile | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'Makefile') diff --git a/Makefile b/Makefile index 4d50f0546637..41ed3062337b 100644 --- a/Makefile +++ b/Makefile @@ -106,8 +106,8 @@ export quiet Q KBUILD_VERBOSE # The O= assignment takes precedence over the KBUILD_OUTPUT environment # variable. -# KBUILD_SRC is set on invocation of make in OBJ directory -# KBUILD_SRC is not intended to be used by the regular user (for now) +# KBUILD_SRC is not intended to be used by the regular user (for now), +# it is set on invocation of make with KBUILD_OUTPUT or O= specified. ifeq ($(KBUILD_SRC),) # OK, Make called in directory where kernel src resides @@ -128,7 +128,6 @@ ifneq ($(words $(subst :, ,$(CURDIR))), 1) endif ifneq ($(KBUILD_OUTPUT),) -# Invoke a second make in the output directory, passing relevant variables # check that the output directory actually exists saved-output := $(KBUILD_OUTPUT) KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ @@ -141,6 +140,7 @@ PHONY += $(MAKECMDGOALS) sub-make $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make @: +# Invoke a second make in the output directory, passing relevant variables sub-make: $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \ -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) -- cgit v1.2.1