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b=ikcMEkxOyNKlEiIRYx2f/6vBL3QsiBeUOGfNDT1z27t4Z8r8XIZVQjEevGQRfcSgM/pO/F8oWLV1uyPvLk+dMy8Snb90/N5P/06ZWc9rCr+o15WLeKi2Ed2krCmr3CcWg7Ro2eSOUT7PPxTqJ5ADEz3NQ+Wiv342VYX0t9duxYI= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=cherry.de; Received: from PA4PR04MB7743.eurprd04.prod.outlook.com (2603:10a6:102:b8::20) by DU4PR04MB10363.eurprd04.prod.outlook.com (2603:10a6:10:55f::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.292.25; Tue, 11 Aug 2026 12:32:26 +0000 Received: from PA4PR04MB7743.eurprd04.prod.outlook.com ([fe80::9a4e:252f:2fd:97b7]) by PA4PR04MB7743.eurprd04.prod.outlook.com ([fe80::9a4e:252f:2fd:97b7%6]) with mapi id 15.21.0292.024; Tue, 11 Aug 2026 12:32:26 +0000 Message-ID: <5c5b2aa3-08ba-4491-8f1d-75216be08252@cherry.de> Date: Tue, 11 Aug 2026 14:32:24 +0200 User-Agent: Mozilla Thunderbird Subject: Re: [OE-core] [PATCH] u-boot: add support for Clang toolchain To: Ross Burton CC: "Harish.Sadineni@windriver.com" , "openembedded-core@lists.openembedded.org" , "Sundeep.Kokkonda@windriver.com" References: <20260811105603.3447122-1-Harish.Sadineni@windriver.com> <274b9268-b499-44b7-9297-628de8facb23@cherry.de> <58AB193A-9DA4-4BC4-BC53-94FDA2D986D4@arm.com> Content-Language: en-US From: Quentin Schulz In-Reply-To: <58AB193A-9DA4-4BC4-BC53-94FDA2D986D4@arm.com> Content-Type: text/plain; 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Tue, 11 Aug 2026 12:32:37 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/243197 Hi Ross, On 8/11/26 2:21 PM, Ross Burton wrote: > On 11 Aug 2026, at 13:13, Quentin Schulz wrote= : >> Why not simply ${TOOLCHAIN}? >=20 > That would be a big assumption that TOOLCHAIN is also the name of the bin= ary, which fails for any native builds. >=20 > But it would also work here=E2=80=A6 >=20 OK. Let's rather not use anti-patterns whenever we can so people aren't=20 tempted to copy this for recipes that can be native/nativesdk too.=20 Please ignore my suggestion for TOOLCHAIN. >> Have you checked we can build u-boot-tools, u-boot-tools-native and nati= vesdk-u-boot-tools with clang? >=20 > FWIW, upstream CI exercises the build with clang so it should work. Our = CI will be doing build+boot tests of some clang builds with qemu. >=20 From my shell history when I built Rockchip boards in U-Boot with clang=20 a few months ago I had run: make CROSS_COMPILE=3D"aarch64-linux-gnu-" O=3Dbuild/puma HOSTCC=3Dclang=20 CC=3Dclang puma-rk3399_defconfig So we need to check HOSTCC is proper and that we really need to add=20 ${TARGET_PREFIX} in front of gcc/clang in CC. I thought u-boot-tools includes u-boot.inc but it doesn't, so ignore my=20 previous comment (we should however verify at some point we can build=20 with either toolchain). Cheers, Quentin