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Message-Id: <20190604101409.2078-1-yamada.masahiro@socionext.com>
Date: Tue, 4 Jun 2019 19:13:54 +0900
From: Masahiro Yamada <yamada.masahiro@...ionext.com>
To: linux-kbuild@...r.kernel.org
Cc: Randy Dunlap <rdunlap@...radead.org>,
Arnd Bergmann <arnd@...db.de>,
David Howells <dhowells@...hat.com>,
Sam Ravnborg <sam@...nborg.org>,
Jani Nikula <jani.nikula@...el.com>,
Masahiro Yamada <yamada.masahiro@...ionext.com>,
linux-doc@...r.kernel.org, Jonathan Corbet <corbet@....net>,
linux-riscv@...ts.infradead.org,
Daniel Borkmann <daniel@...earbox.net>,
linux-s390@...r.kernel.org, Greentime Hu <green.hu@...il.com>,
Helge Deller <deller@....de>,
Vineet Gupta <vgupta@...opsys.com>,
Palmer Dabbelt <palmer@...ive.com>,
Christian Borntraeger <borntraeger@...ibm.com>,
linux-snps-arc@...ts.infradead.org,
Song Liu <songliubraving@...com>,
"James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
Yonghong Song <yhs@...com>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Michal Marek <michal.lkml@...kovi.net>,
Paul Mackerras <paulus@...ba.org>,
Martin KaFai Lau <kafai@...com>,
Albert Ou <aou@...s.berkeley.edu>,
Vasily Gorbik <gor@...ux.ibm.com>,
linux-parisc@...r.kernel.org, Alexei Starovoitov <ast@...nel.org>,
Michael Ellerman <mpe@...erman.id.au>,
Heiko Carstens <heiko.carstens@...ibm.com>,
linux-kernel@...r.kernel.org, Vincent Chen <deanbo422@...il.com>,
netdev@...r.kernel.org, bpf@...r.kernel.org,
linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH 00/15] kbuild: refactor headers_install and support compile-test of UAPI headers
Multiple people have suggested to compile-test UAPI headers.
Currently, Kbuild provides simple sanity checks by headers_check
but they are not enough to catch bugs.
The most recent patch I know is David Howells' work:
https://patchwork.kernel.org/patch/10590203/
I agree that we need better tests for UAPI headers,
but I want to integrate it in a clean way.
The idea that has been in my mind is to compile each header
to make sure the selfcontainedness.
Recently, Jani Nikula proposed a new syntax 'header-test-y'.
https://patchwork.kernel.org/patch/10947005/
So, I implemented UAPI compile-testing on top of that.
When adding a new feature, cleaning the code first is a
good practice.
[1] Remove headers_install_all
This target installs UAPI headers of all architectures
in a single tree.
It does not make sense to compile test of headers from
multiple arches at the same time. Hence, removed.
[2] Split header installation into 'make headers' and 'make headers_install'
To compile-test UAPI headers, we need a work-directory somewhere
to save objects and .*.cmd files.
usr/include/ will be the work-directory.
Since we cannot pollute the final destination of headers_install,
I split the header installation into two stages.
'make headers' will build up
the ready-to-install headers in usr/include,
which will be also used as a work-directory for the compile-test.
'make headers_install' will copy headers
from usr/include to $(INSTALL_HDR_PATH)/include.
[3] Support compile-test of UAPI headers
This is implemented in usr/include/Makefile
Jani Nikula (1):
kbuild: add support for ensuring headers are self-contained
Masahiro Yamada (14):
kbuild: remove headers_{install,check}_all
kbuild: remove stale dependency between Documentation/ and
headers_install
kbuild: make gdb_script depend on prepare0 instead of prepare
kbuild: fix Kconfig prompt of CONFIG_HEADERS_CHECK
kbuild: add CONFIG_HEADERS_INSTALL and loosen the dependency of
samples
kbuild: remove build_unifdef target in scripts/Makefile
kbuild: build all prerequisite of headers_install simultaneously
kbuild: add 'headers' target to build up ready-to-install uapi headers
kbuild: re-implement Makefile.headersinst without directory descending
kbuild: move hdr-inst shorthand to top Makefile
kbuild: simplify scripts/headers_install.sh
kbuild: deb-pkg: do not run headers_check
fixup: kbuild: add support for ensuring headers are self-contained
kbuild: compile test UAPI headers to ensure they are self-contained
Documentation/kbuild/headers_install.txt | 7 --
Documentation/kbuild/makefiles.txt | 13 ++-
Makefile | 56 +++++-----
arch/arc/configs/tb10x_defconfig | 1 +
arch/nds32/configs/defconfig | 1 +
arch/parisc/configs/a500_defconfig | 1 +
arch/parisc/configs/b180_defconfig | 1 +
arch/parisc/configs/c3000_defconfig | 1 +
arch/parisc/configs/default_defconfig | 1 +
arch/powerpc/configs/ppc6xx_defconfig | 1 +
arch/s390/configs/debug_defconfig | 1 +
include/uapi/{linux => }/Kbuild | 6 +-
init/Kconfig | 20 ++++
lib/Kconfig.debug | 25 +++--
samples/Kconfig | 14 ++-
samples/Makefile | 4 +-
scripts/Kbuild.include | 6 --
scripts/Makefile | 5 -
scripts/Makefile.build | 9 ++
scripts/Makefile.headersinst | 132 ++++++++++-------------
scripts/Makefile.lib | 3 +
scripts/cc-system-headers.sh | 8 ++
scripts/headers.sh | 29 -----
scripts/headers_install.sh | 48 ++++-----
scripts/package/builddeb | 2 +-
usr/.gitignore | 1 -
usr/Makefile | 2 +
usr/include/.gitignore | 3 +
usr/include/Makefile | 132 +++++++++++++++++++++++
29 files changed, 329 insertions(+), 204 deletions(-)
rename include/uapi/{linux => }/Kbuild (77%)
create mode 100755 scripts/cc-system-headers.sh
delete mode 100755 scripts/headers.sh
create mode 100644 usr/include/.gitignore
create mode 100644 usr/include/Makefile
--
2.17.1
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