On Tue, Aug 4, 2026 at 4:41 AM Ross Burton via lists.openembedded.org
<[email protected]> wrote:
> Previously, u-boot was almost always built with GCC because the
> kernel-arch inherit set TOOLCHAIN to KERNEL_TOOLCHAIN, which defaulted
> to 'gcc'.
>
> However, since kernel-arch inherit was removed, u-boot in theory now
> respects the default toolchain. In practise, the recipe hard-codes CC
> to be gcc, and there are known caveats building u-boot with clang[2].
>
None of these caveats are relevant to u-boot and clang versions we use
isn't it?
so it seems to be workaround for some issue that is now brought forth which
was
latent before ? if so, why not fix that
>
> In the long term we should be able to make this recipe respect TOOLCHAIN,
> as the upstream u-boot CI does build and test with clang, but for now
> fix the build by restoring the explicit use of gcc.
>
> [1] oe-core 8fb5470841b ("u-boot: Separate out from kernel-arch.bbclass")
> [2] https://docs.u-boot-project.org/en/latest/build/clang.html
>
> Signed-off-by: Ross Burton <[email protected]>
> ---
> meta/recipes-bsp/u-boot/u-boot.inc | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/meta/recipes-bsp/u-boot/u-boot.inc
> b/meta/recipes-bsp/u-boot/u-boot.inc
> index 3e2f5aa1a5f..00a12f1bb91 100644
> --- a/meta/recipes-bsp/u-boot/u-boot.inc
> +++ b/meta/recipes-bsp/u-boot/u-boot.inc
> @@ -3,6 +3,10 @@ PROVIDES = "virtual/bootloader"
>
> PACKAGE_ARCH = "${MACHINE_ARCH}"
>
> +# u-boot is best built with gcc
> +# https://docs.u-boot-project.org/en/latest/build/clang.html
> +TOOLCHAIN = "gcc"
> +
> DEPENDS += "${@bb.utils.contains('UBOOT_ENV_SUFFIX', 'scr',
> 'u-boot-mkimage-native', '', d)}"
> DEPENDS += "${@ 'u-boot-mkenvimage-native' if
> bb.utils.to_boolean(d.getVar('UBOOT_INITIAL_ENV_BINARY')) else ''}"
>
> --
> 2.43.0
>
>
>
>
>
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