From: Masahiro Yamada <yamada.masahiro@socionext.com>
To: Kees Cook <keescook@chromium.org>
Cc: linux-kbuild <linux-kbuild@vger.kernel.org>,
Sam Ravnborg <sam@ravnborg.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Arnd Bergmann <arnd@arndb.de>,
Ulf Magnusson <ulfalizer@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Randy Dunlap <rdunlap@infradead.org>,
"Luis R . Rodriguez" <mcgrof@kernel.org>,
Nicolas Pitre <nico@linaro.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 14/21] kconfig: add CC_IS_CLANG and CLANG_VERSION
Date: Wed, 28 Mar 2018 20:52:01 +0900 [thread overview]
Message-ID: <CAK7LNAQAvt7uWyY+FdnKfxzMBXHAgkxmycKm+-NRHYxo1LtLJA@mail.gmail.com> (raw)
In-Reply-To: <CAGXu5jK48XYSpga0M-49GPrMT3iud7rqEOD7ZpKQR-MXi=zjWw@mail.gmail.com>
2018-03-28 20:22 GMT+09:00 Kees Cook <keescook@chromium.org>:
> On Mon, Mar 26, 2018 at 10:29 PM, Masahiro Yamada
> <yamada.masahiro@socionext.com> wrote:
>> This will be useful to describe the clang version dependency.
>>
>> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
>
> One aspect of clang version checking that may be "weird" (and likely
> won't be meaningful for very long as we're about to raise the minimum
> gcc version), is that clang claims to be gcc version 4.2 if you look
> at #defines. This is already handled in compiler.h, but may be weird
> in Kconfig.
>
CONFIG_CLANG_VERSION gives me real clang version.
$ clang --version
clang version 7.0.0 (http://llvm.org/git/clang.git
f1d1f4c4591e81cfa80034df094b26d7eb4fa92b)
(http://llvm.org/git/llvm.git
d157ba2f80790d23d717c4ff3f5bee30d98d6a51)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/masahiro/toolchains/clang-latest/bin
$ make CC=clang defconfig
*** Default configuration is based on 'x86_64_defconfig'
#
# configuration written to .config
#
$ grep CLANG_VERSION .config
CONFIG_CLANG_VERSION=70000
I am just porting
https://patchwork.kernel.org/patch/10085765/
to Kconfig.
--
Best Regards
Masahiro Yamada
next prev parent reply other threads:[~2018-03-28 11:52 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-27 5:29 [PATCH v2 00/21] kconfig: move compiler capability tests to Kconfig Masahiro Yamada
2018-03-27 5:29 ` Masahiro Yamada
2018-03-27 5:29 ` [PATCH v2 01/21] kbuild: remove kbuild cache Masahiro Yamada
2018-03-28 3:26 ` Kees Cook
2018-03-27 5:29 ` [PATCH v2 02/21] kbuild: remove CONFIG_CROSS_COMPILE support Masahiro Yamada
2018-03-28 3:28 ` Kees Cook
2018-03-27 5:29 ` [PATCH v2 03/21] kconfig: move and rename sym_expand_string_value() Masahiro Yamada
2018-03-28 3:29 ` Kees Cook
2018-03-27 5:29 ` [PATCH v2 04/21] kconfig: reference environments directly and remove 'option env=' syntax Masahiro Yamada
2018-03-28 3:33 ` Kees Cook
2018-03-29 2:19 ` Ulf Magnusson
2018-03-29 2:56 ` Ulf Magnusson
2018-03-29 17:38 ` Ulf Magnusson
2018-03-30 5:30 ` Masahiro Yamada
2018-04-01 2:27 ` Ulf Magnusson
2018-04-01 2:40 ` Ulf Magnusson
2018-04-13 6:02 ` Masahiro Yamada
2018-03-27 5:29 ` [PATCH v2 05/21] kconfig: remove string expansion in file_lookup() Masahiro Yamada
2018-03-28 3:34 ` Kees Cook
2018-04-01 2:52 ` Ulf Magnusson
2018-03-27 5:29 ` [PATCH v2 06/21] kconfig: remove string expansion for mainmenu after yyparse() Masahiro Yamada
2018-03-28 3:35 ` Kees Cook
2018-04-01 2:59 ` Ulf Magnusson
2018-03-27 5:29 ` [PATCH v2 07/21] kconfig: add function support and implement 'shell' function Masahiro Yamada
2018-03-28 3:41 ` Kees Cook
2018-04-13 5:32 ` Masahiro Yamada
2018-03-29 2:42 ` Ulf Magnusson
2018-04-01 4:19 ` Ulf Magnusson
2018-04-13 5:37 ` Masahiro Yamada
2018-03-27 5:29 ` [PATCH v2 08/21] kconfig: replace $UNAME_RELEASE with function call Masahiro Yamada
2018-03-28 3:42 ` Kees Cook
2018-04-01 4:38 ` Ulf Magnusson
2018-03-27 5:29 ` [PATCH v2 09/21] kconfig: add 'macro' keyword to support user-defined function Masahiro Yamada
2018-03-28 3:45 ` Kees Cook
2018-04-01 6:05 ` Ulf Magnusson
2018-04-01 6:49 ` Ulf Magnusson
2018-04-13 5:44 ` Masahiro Yamada
2018-03-27 5:29 ` [PATCH v2 10/21] kconfig: add 'success' and 'cc-option' macros Masahiro Yamada
2018-03-28 3:46 ` Kees Cook
2018-04-01 6:28 ` Ulf Magnusson
2018-03-27 5:29 ` [PATCH v2 11/21] stack-protector: test compiler capability in Kconfig and drop AUTO mode Masahiro Yamada
2018-03-28 11:18 ` Kees Cook
2018-04-09 8:54 ` Masahiro Yamada
2018-04-09 15:04 ` Kees Cook
2018-04-10 3:15 ` Masahiro Yamada
2018-03-27 5:29 ` [PATCH v2 12/21] kconfig: show compiler version text in the top comment Masahiro Yamada
2018-03-28 3:26 ` Kees Cook
2018-03-27 5:29 ` [PATCH v2 13/21] kconfig: add CC_IS_GCC and GCC_VERSION Masahiro Yamada
2018-03-28 11:19 ` Kees Cook
2018-03-27 5:29 ` [PATCH v2 14/21] kconfig: add CC_IS_CLANG and CLANG_VERSION Masahiro Yamada
2018-03-28 11:22 ` Kees Cook
2018-03-28 11:52 ` Masahiro Yamada [this message]
2018-03-27 5:29 ` [PATCH v2 15/21] gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT Masahiro Yamada
2018-03-27 9:12 ` Peter Oberparleiter
2018-03-28 11:24 ` Kees Cook
2018-03-27 5:29 ` [PATCH v2 16/21] kcov: imply GCC_PLUGINS and GCC_PLUGIN_SANCOV instead of select'ing them Masahiro Yamada
2018-03-28 11:25 ` Kees Cook
2018-03-28 11:53 ` Kees Cook
2018-03-27 5:29 ` [PATCH v2 17/21] gcc-plugins: always build plugins with C++ Masahiro Yamada
2018-03-28 11:29 ` Kees Cook
2018-03-27 5:29 ` [PATCH v2 18/21] gcc-plugins: move GCC version check for PowerPC to Kconfig Masahiro Yamada
2018-03-28 11:30 ` Kees Cook
2018-03-27 5:29 ` [PATCH v2 19/21] gcc-plugins: test GCC plugin support in Kconfig Masahiro Yamada
2018-03-28 11:44 ` Kees Cook
2018-04-11 15:55 ` Masahiro Yamada
2018-04-11 16:09 ` Kees Cook
2018-03-27 5:29 ` [PATCH v2 20/21] gcc-plugins: enable GCC_PLUGINS for COMPILE_TEST Masahiro Yamada
2018-03-28 11:47 ` Kees Cook
2018-04-10 6:15 ` Masahiro Yamada
2018-04-10 7:00 ` Kees Cook
2018-03-27 5:29 ` [PATCH v2 21/21] arm64: move GCC version check for ARCH_SUPPORTS_INT128 to Kconfig Masahiro Yamada
2018-03-27 5:29 ` Masahiro Yamada
2018-03-27 17:28 ` Will Deacon
2018-03-27 17:28 ` Will Deacon
2018-03-28 11:55 ` Kees Cook
2018-03-28 11:55 ` Kees Cook
2018-03-27 16:39 ` [PATCH v2 00/21] kconfig: move compiler capability tests " Masahiro Yamada
2018-03-27 16:39 ` Masahiro Yamada
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