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| author | Masahiro Yamada | 2019-03-26 05:02:19 +0100 |
|---|---|---|
| committer | Masahiro Yamada | 2019-03-28 15:46:54 +0100 |
| commit | 221cc2d27ddc49b3e06d4637db02bf78e70c573c (patch) | |
| tree | 886060b5f3f242cd763c0ea5c00ef80cda597c6f /.clang-format | |
| parent | coccinelle: put_device: reduce false positives (diff) | |
| download | kernel-qcow2-linux-221cc2d27ddc49b3e06d4637db02bf78e70c573c.tar.gz kernel-qcow2-linux-221cc2d27ddc49b3e06d4637db02bf78e70c573c.tar.xz kernel-qcow2-linux-221cc2d27ddc49b3e06d4637db02bf78e70c573c.zip | |
kbuild: skip parsing pre sub-make code for recursion
When Make recurses to the top Makefile with sub-make-done unset,
the code block surrounded by 'ifneq ($(sub-make-done),1) ... endif'
is parsed multiple times. This happens for in-tree building of
include/config/auto.conf, *-pkg, etc. with GNU Make 4.x.
This is a slight regression by commit 688931a5ad4e ("kbuild: skip
sub-make for in-tree build with GNU Make 4.x") in terms of performance
since that code block contains one $(shell ...) invocation.
Fix it by exporting the variable irrespective of sub-make being run.
I renamed it because GNU Make cannot properly export variables
containing hyphens. This is probably a bug of GNU Make, and the issue
in Kbuild had already been reported by commit 2bfbe7881ee0 ("kbuild:
Do not use hyphen in exported variable name").
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to '.clang-format')
0 files changed, 0 insertions, 0 deletions