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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-03-08 18:13:39 +0900 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-03-14 02:39:12 +0900 |
| commit | 2b50f7ab63685cd247e32ad321f7338ed130d3d5 (patch) | |
| tree | a4b417d434d5dfae63126736b59fca966e0897b7 | |
| parent | 94cf8acc38e57caaba1329a255409b6d93936ba7 (diff) | |
| download | linux-0-day-2b50f7ab63685cd247e32ad321f7338ed130d3d5.tar.gz linux-0-day-2b50f7ab63685cd247e32ad321f7338ed130d3d5.tar.xz | |
kbuild: add workaround for Debian make-kpkg
Since commit 3812b8c5c5d5 ("kbuild: make -r/-R effective in top
Makefile for old Make versions"), make-kpkg is not working.
make-kpkg directly includes the top Makefile of Linux kernel, and
appends some debian_* targets.
/usr/share/kernel-package/ruleset/kernel_version.mk:
# Include the kernel makefile
override dot-config := 1
include Makefile
dot-config := 1
I did not know the kernel Makefile was used in that way, and it is
hard to guarantee the behavior when the kernel Makefile is included
by another Makefile from a different project.
It looks like Debian Stretch stopped providing make-kpkg. Maybe it is
obsolete and being replaced with 'make deb-pkg' etc. but still widely
used.
This commit adds a workaround; if the top Makefile is included by
another Makefile, skip sub-make in order to make the main part visible.
'MAKEFLAGS += -rR' does not become effective for GNU Make < 4.0, but
Debian/Ubuntu is already using newer versions.
The effect of this commit:
Debian 8 (Jessie) : Fixed
Debian 9 (Stretch) : make-kpkg (kernel-package) is not provided
Ubuntu 14.04 LTS : NOT Fixed
Ubuntu 16.04 LTS : Fixed
Ubuntu 18.04 LTS : Fixed
This commit cannot fix Ubuntu 14.04 because it installs GNU Make 3.81,
but its support will end in Apr 2019, which is before the Linux v5.1
release.
I added warning so that nobody would try to include the top Makefile.
Fixes: 3812b8c5c5d5 ("kbuild: make -r/-R effective in top Makefile for old Make versions")
Reported-by: Liz Zhang <lizzha@microsoft.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Lili Deng <v-lide@microsoft.com>
Cc: Manoj Srivastava <srivasta@debian.org>
| -rw-r--r-- | Makefile | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Makefile b/Makefile index 9ef547fc7ffe9..1ef92d7059844 100644 --- a/Makefile +++ b/Makefile @@ -31,6 +31,16 @@ _all: # descending is started. They are now explicitly listed as the # prepare rule. +# Ugly workaround for Debian make-kpkg: +# make-kpkg directly includes the top Makefile of Linux kernel. In such a case, +# skip sub-make to support debian_* targets in ruleset/kernel_version.mk, but +# displays warning to discourage such abusage. +ifneq ($(word 2, $(MAKEFILE_LIST)),) +$(warning Do not include top Makefile of Linux Kernel) +sub-make-done := 1 +MAKEFLAGS += -rR +endif + ifneq ($(sub-make-done),1) # Do not use make's built-in rules and variables |