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authorMasahiro Yamada <yamada.masahiro@socionext.com>2018-09-14 15:33:23 +0900
committerMasahiro Yamada <yamada.masahiro@socionext.com>2018-10-04 22:56:01 +0900
commit80463f1b7bf9f822fd3495139bcf3ef254fdca10 (patch)
tree8cdacffa9330a8026f9f9a6013096cd9f01107a4 /Makefile
parent00d78ab2ba756af7b9a4dacd437b7a882bd18a4b (diff)
downloadlinux-80463f1b7bf9f822fd3495139bcf3ef254fdca10.tar.gz
kbuild: add --include-dir flag only for out-of-tree build
The --include-dir flag is used to include check-in Makefiles from $(objtree) without $(srctree)/ prefix. Obviously, this is unneeded for in-tree build. Add the flag just before changing the working directory. This becomes effective after invoking sub-make. Add a little bit comments about it. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile14
1 files changed, 10 insertions, 4 deletions
diff --git a/Makefile b/Makefile
index 8f6dbfce1e7e..2087e797c954 100644
--- a/Makefile
+++ b/Makefile
@@ -15,10 +15,9 @@ NAME = Merciless Moray
PHONY := _all
_all:
-# o Do not use make's built-in rules and variables
-# (this increases performance and avoids hard-to-debug behaviour);
-# o Look for make include files relative to root of kernel src
-MAKEFLAGS += -rR --include-dir=$(CURDIR)
+# Do not use make's built-in rules and variables
+# (this increases performance and avoids hard-to-debug behaviour)
+MAKEFLAGS += -rR
# Avoid funny character set dependencies
unexport LC_ALL
@@ -136,6 +135,13 @@ KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
$(if $(KBUILD_OUTPUT),, \
$(error failed to create output directory "$(saved-output)"))
+# Look for make include files relative to root of kernel src
+#
+# This does not become effective immediately because MAKEFLAGS is re-parsed
+# once after the Makefile is read. It is OK since we are going to invoke
+# 'sub-make' below.
+MAKEFLAGS += --include-dir=$(CURDIR)
+
PHONY += $(MAKECMDGOALS) sub-make
$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make