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Commit c4e6fff1 authored by Cao jin's avatar Cao jin Committed by Masahiro Yamada
Browse files

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: default avatarCao jin <caoj.fnst@cn.fujitsu.com>
Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
parent d77698df

Makefile

+3 −3
Original line number Diff line number Diff line
@@ -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))