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From:   Masahiro Yamada <yamada.masahiro@socionext.com>
To:     linux-kbuild@vger.kernel.org,
        Linus Torvalds <torvalds@linux-foundation.org>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Arnd Bergmann <arnd@arndb.de>,
        Kees Cook <keescook@chromium.org>,
        Randy Dunlap <rdunlap@infradead.org>,
        Ulf Magnusson <ulfalizer@gmail.com>,
        Sam Ravnborg <sam@ravnborg.org>,
        Michal Marek <michal.lkml@markovi.net>,
        Masahiro Yamada <yamada.masahiro@socionext.com>,
        linux-kernel@vger.kernel.org
Subject: [PATCH 15/23] kconfig: add CC_IS_GCC and GCC_VERSION
Date:   Sat, 17 Feb 2018 03:38:43 +0900
Message-Id: <1518806331-7101-16-git-send-email-yamada.masahiro@socionext.com>
In-Reply-To: <1518806331-7101-1-git-send-email-yamada.masahiro@socionext.com>
References: <1518806331-7101-1-git-send-email-yamada.masahiro@socionext.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

This will be useful to specify the required compiler version,
like this:

config FOO
        bool "Use Foo"
        depends on GCC_VERSION >= 408000
        help
          This feature requires GCC 4.8 or newer.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---

 init/Kconfig | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/init/Kconfig b/init/Kconfig
index 837a584..f2da5e9 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -12,6 +12,15 @@ config cc-option
 	string
 	macro $(shell $CC -Werror $(1) -c -x c /dev/null -o /dev/null)
 
+config CC_IS_GCC
+	bool
+	default $(shell $CC --version | grep -q gcc)
+
+config GCC_VERSION
+	int
+	default $(shell-stdout $srctree/scripts/gcc-version.sh -p $CC | sed 's/^0*//') if CC_IS_GCC
+	default 0
+
 config CONSTRUCTORS
 	bool
 	depends on !UML
-- 
2.7.4