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| author |   Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-03-30 21:04:17 +0900 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-04-02 23:28:04 +0900 |
| commit | a9a49c2ad9b9b8ee20668c15ca2b806dbed8ea40 (patch) | |
| tree | bb1ff85715935f583ef536b2a13a5a5ce9433b44 /scripts/Makefile.lib | |
| parent | kbuild: mkmakefile: generate a simple wrapper of top Makefile (diff) | |
| download | linux-dev-a9a49c2ad9b9b8ee20668c15ca2b806dbed8ea40.tar.xz linux-dev-a9a49c2ad9b9b8ee20668c15ca2b806dbed8ea40.zip | |
kbuild: use $(srctree) instead of KBUILD_SRC to check out-of-tree build
KBUILD_SRC was conventionally used for some different purposes:
[1] To remember the source tree path
[2] As a flag to check if sub-make is already done
[3] As a flag to check if Kbuild runs out of tree
For [1], we do not need to remember it because the top Makefile
can compute it by $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
[2] has been replaced with self-commenting 'sub_make_done'.
For [3], we can distinguish in-tree/out-of-tree by comparing
$(srctree) and '.'
This commit converts [3] to prepare for the KBUILD_SRC removal.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to '')
| -rw-r--r-- | scripts/Makefile.lib | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 8a1f64f17740..41e98fa66b91 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -144,7 +144,7 @@ __cpp_flags = $(_cpp_flags) # If building the kernel in a separate objtree expand all occurrences # of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/'). ifeq ($(KBUILD_EXTMOD),) -ifneq ($(KBUILD_SRC),) +ifneq ($(srctree),.) # -I$(obj) locates generated .h files # $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files |