From patchwork Fri Apr 13 05:06:31 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 133334 Delivered-To: patch@linaro.org Received: by 10.46.84.18 with SMTP id i18csp347572ljb; Thu, 12 Apr 2018 22:13:39 -0700 (PDT) X-Google-Smtp-Source: AIpwx490LbjNUEdgO5GWND/hB1fyPjvWFbfw0/TJ58PSrl93Ml9bOZDX4p9YXBGCyxtQcEmn01mq X-Received: by 10.99.174.6 with SMTP id q6mr2912465pgf.179.1523596419139; Thu, 12 Apr 2018 22:13:39 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1523596419; cv=none; d=google.com; s=arc-20160816; b=YhLdd8VSPAlle0Ihqa/iD6zUY8sDekne+xiiHq4KdrAxgK9VXV6gxih/Zis3dg2xuO ZhD1tSFa9UJLupJW9nYrJHASrvcIRUW9mqJ9/OHmonq0Hm0U0UJwctah0q8DiNfcVhGM kNedC4AD3HkV5uO+BeexCnK1wp2jLtPPsidsjWE/IIyuINJWIFk2Xse1HT6IOMoWg1s2 /ZrVVPh9hjMv6jYCiQR3E9Dq5wOKb44zrl2fcj0lrMiI6kL4Gjqadzdvm1QiKFmdBD8z QNkrX5RItcVeFHP0y7K9g55zEc5dzADXlKQw2Z+qZtlbZAiCN2dfRZPi4sG3lQLs83aU Tdhg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from:dkim-signature:dkim-filter :arc-authentication-results; bh=jg3lVjZel2Yf7OtQxyanll2wk0Bf1Z/iSQBNf+EWzY8=; b=r1nasQYP1cH+F+XPnlx5+RTFHxbIYkukuc52z+hZc53NYGOg0GcbhJNMJf+RuVtiFs NNtsAck0msVy880I1UW/FragBE+qbkVN9ODRTSMqq1zp9+LfWDU2BldtunFEHmTp5yTu V1o15HqHL5O2UGiWuD0NB31yjAKuS5JfWtetiazOjBWztuIWs3zREZzk6n8gRQff6nGg 73Yd9TOEE1sURXTliSJPwqzwHdJj8gZz076V7OVllmAx951HHA3J7k4PuTIlHNeZW25x McZzWw1LK7Pvl8PIPS9RK8vVGWZSyS4vs0pB+3Not5jCk3Fl1P12gArUbq4D5XIYZCY0 PfZw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@nifty.com header.s=dec2015msa header.b=JNTrERy8; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id f16si3313507pgt.800.2018.04.12.22.13.38; Thu, 12 Apr 2018 22:13:39 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@nifty.com header.s=dec2015msa header.b=JNTrERy8; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753126AbeDMFMm (ORCPT + 29 others); Fri, 13 Apr 2018 01:12:42 -0400 Received: from conuserg-07.nifty.com ([210.131.2.74]:54532 "EHLO conuserg-07.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751083AbeDMFIQ (ORCPT ); Fri, 13 Apr 2018 01:08:16 -0400 Received: from pug.e01.socionext.com (p14092-ipngnfx01kyoto.kyoto.ocn.ne.jp [153.142.97.92]) (authenticated) by conuserg-07.nifty.com with ESMTP id w3D56lgG029209; Fri, 13 Apr 2018 14:07:07 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-07.nifty.com w3D56lgG029209 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1523596028; bh=jg3lVjZel2Yf7OtQxyanll2wk0Bf1Z/iSQBNf+EWzY8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JNTrERy8/DRBsxMZo1tCyUPCVUErl3Rdxj9lZ4kWlATSLwdkNb2Aq7jWRy1eKGP6F JDwSMfUX5cxFUve1sxo/FNv9tnQr+AXe7f7rvwfVFCYGEc01cozjf+0jWvQEJwnezP gZcxw8VM4NmP/9t14dz+GzX15FPZDzAahmqoPlU/c783iqLlTx/3ao+apXiwxFIxjS d9FL76RSbNsLu8aAwgIDrmi7zv2xQjt3rY1oTQhyPRRAbWFWtuhbv2UxyqWBV47tNL SdqBBLIF7C+FlK0bsfjitatkNtsNQ8DWxikMCynoSQFGmFJ4A/f4ZTYFy8orWskZXK rgB3H50CDggEg== X-Nifty-SrcIP: [153.142.97.92] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: Linus Torvalds , Sam Ravnborg , Ulf Magnusson , Nicholas Piggin , Kees Cook , Emese Revfy , x86@kernel.org, Masahiro Yamada , linux-kernel@vger.kernel.org Subject: [PATCH 22/30] kconfig: add CC_IS_GCC and GCC_VERSION Date: Fri, 13 Apr 2018 14:06:31 +0900 Message-Id: <1523595999-27433-23-git-send-email-yamada.masahiro@socionext.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1523595999-27433-1-git-send-email-yamada.masahiro@socionext.com> References: <1523595999-27433-1-git-send-email-yamada.masahiro@socionext.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Reviewed-by: Kees Cook --- Changes in v3: None Changes in v2: None init/Kconfig | 8 ++++++++ 1 file changed, 8 insertions(+) -- 2.7.4 diff --git a/init/Kconfig b/init/Kconfig index 4b0b636..145a534 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -8,6 +8,14 @@ config DEFCONFIG_LIST default ARCH_DEFCONFIG default "arch/$(ARCH)/defconfig" +config CC_IS_GCC + def_bool $(success $(CC) --version | grep -q gcc) + +config GCC_VERSION + int + default $(shell $(srctree)/scripts/gcc-version.sh -p $(CC) | sed 's/^0*//') if CC_IS_GCC + default 0 + config CONSTRUCTORS bool depends on !UML