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Tue, 30 Oct 2018 16:51:58 +0000 Received: from CY4PR2201MB1272.namprd22.prod.outlook.com ([fe80::ace0:f12e:c2a0:dc23]) by CY4PR2201MB1272.namprd22.prod.outlook.com ([fe80::ace0:f12e:c2a0:dc23%8]) with mapi id 15.20.1273.027; Tue, 30 Oct 2018 16:51:58 +0000 From: Paul Burton To: Masahiro Yamada CC: "linux-kbuild@vger.kernel.org" , "linux-mips@linux-mips.org" , James Hogan , Michael Ellerman , Benjamin Herrenschmidt , "linux-kernel@vger.kernel.org" , Michal Marek , Paul Mackerras , Ralf Baechle , "linuxppc-dev@lists.ozlabs.org" Subject: Re: [PATCH v2 1/2] kbuild: replace cc-name test with CONFIG_CC_IS_CLANG Thread-Topic: [PATCH v2 1/2] kbuild: replace cc-name test with CONFIG_CC_IS_CLANG Thread-Index: AQHUcFRQUdRvUBuRmUqUi+ZWeLGgeaU4ARIA Date: Tue, 30 Oct 2018 16:51:58 +0000 Message-ID: <20181030165156.k6blbpbxh2fmiiay@pburton-laptop> References: <1540905994-6073-1-git-send-email-yamada.masahiro@socionext.com> In-Reply-To: <1540905994-6073-1-git-send-email-yamada.masahiro@socionext.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: MWHPR04CA0107.namprd04.prod.outlook.com (2603:10b6:301:3a::48) To CY4PR2201MB1272.namprd22.prod.outlook.com (2603:10b6:910:61::18) user-agent: NeoMutt/20180716 authentication-results: spf=none (sender IP is ) smtp.mailfrom=pburton@wavecomp.com; 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received-spf: None (protection.outlook.com: wavecomp.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: MKMc9vEn0n75NPpSLBhshB3W4Q9Dxquj5glw9vSdzn2TtYE/VfvUv3nKi2sKUo5/kqwlx3XhUnFrDRCdrKDPqbTtCDusXeB0M5esVLIt/WePHJRq10cb7zHRcc9XqC6yKEINKPlpbpXK99yUuYFshp9gombpUAYHd+Bnj94+SSzqpHGnNdLv45L+2XHKIbptq24WrR0cyqautJoQBQ+F6hL1CHsaTIFgiXEoaxqFpNoy1hHWJgxd+nr1FDnMWxOiRogCmIWAKsDgRBw/R4ReO7Mr6rkf3iARkwXRResH804jaBdf4WxgLVUox+7GtueuwBNiJEEIJI5z5AyrkgyrTfceV0XALMgdCQlts/s9Fzc= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="us-ascii" Content-ID: <256788EA86DFB442B581ECDC903CFAAF@namprd22.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: mips.com X-MS-Exchange-CrossTenant-Network-Message-Id: fa5bde02-1166-4956-0ac2-08d63e880185 X-MS-Exchange-CrossTenant-originalarrivaltime: 30 Oct 2018 16:51:58.6474 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 463607d3-1db3-40a0-8a29-970c56230104 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR2201MB1240 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Masahiro, On Tue, Oct 30, 2018 at 10:26:33PM +0900, Masahiro Yamada wrote: > Evaluating cc-name invokes the compiler every time even when you are > not compiling anything, like 'make help'. This is not efficient. >=20 > The compiler type has been already detected in the Kconfig stage. > Use CONFIG_CC_IS_CLANG, instead. >=20 > Signed-off-by: Masahiro Yamada > Acked-by: Michael Ellerman (powerpc) Looks good to me: Acked-by: Paul Burton (MIPS) Thanks, Paul