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kbuild: reuse this-makefile to define abs_srctree

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Move this-makefile up, and reuse it to define abs_srctree.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Masahiro Yamada 2021-02-22 01:50:19 +09:00
parent f91e46b1a7
commit 30cef68d2d
1 changed files with 2 additions and 3 deletions
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5
Makefile
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@ -145,7 +145,8 @@ else
need-sub-make := 1
endif
abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
this-makefile := $(lastword $(MAKEFILE_LIST))
abs_srctree := $(realpath $(dir $(this-makefile)))
ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
$(error source directory cannot contain spaces or colons)
@ -160,8 +161,6 @@ MAKEFLAGS += --include-dir=$(abs_srctree)
need-sub-make := 1
endif
this-makefile := $(lastword $(MAKEFILE_LIST))
ifneq ($(filter 3.%,$(MAKE_VERSION)),)
# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
# We need to invoke sub-make to avoid implicit rules in the top Makefile.