Re: [OE-core] [PATCH] u-boot: add support for Clang toolchain

[Quentin Schulz <quentin.schulz@cherry.de>]

Hi Ross,

On 8/11/26 2:21 PM, Ross Burton wrote:
> On 11 Aug 2026, at 13:13, Quentin Schulz <quentin.schulz@cherry.de> wrote:
>> Why not simply ${TOOLCHAIN}?
> 
> That would be a big assumption that TOOLCHAIN is also the name of the binary, which fails for any native builds.
> 
> But it would also work here…
> 

OK. Let's rather not use anti-patterns whenever we can so people aren't 
tempted to copy this for recipes that can be native/nativesdk too. 
Please ignore my suggestion for TOOLCHAIN.

>> Have you checked we can build u-boot-tools, u-boot-tools-native and nativesdk-u-boot-tools with clang?
> 
> 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.
> 

 From my shell history when I built Rockchip boards in U-Boot with clang 
a few months ago I had run:

make CROSS_COMPILE="aarch64-linux-gnu-" O=build/puma HOSTCC=clang 
CC=clang puma-rk3399_defconfig

So we need to check HOSTCC is proper and that we really need to add 
${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 
previous comment (we should however verify at some point we can build 
with either toolchain).

Cheers,
Quentin