[Buildroot] csky 8xx toolchain issue

Romain Naour romain.naour at gmail.com
Sat Oct 2 20:44:37 UTC 2021


Hello Yann,

Le 02/10/2021 à 22:34, Yann E. MORIN a écrit :
> Romain, All,
> 
> On 2021-10-02 22:21 +0200, Romain Naour spake thusly:
>> Le 02/10/2021 à 20:25, Thomas Petazzoni a écrit :
>>> On Sat, 2 Oct 2021 17:58:24 +0200
>>> Romain Naour <romain.naour at gmail.com> wrote:
>>>> The csky toolchain is still broken with recent host compiler and our CI will
>>>> switch to Debian bullseye soon.
> [--SNIP--]
>>> Considering these issues and the fact that there has been no updates in
>>> terms of C-SKY support for a long time, I think we should consider
>>> dropping support for the C-SKY CPU architecture.
>> csky860 will be supported by gcc 12:
>> https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=db92bd223e3957ee58b5a0c0fffd8b7766f1def3
> 
> In the meantime, what about just:
> 
>     diff --git a/arch/Config.in b/arch/Config.in
>     index 1853e26bb4..ab40294ddc 100644
>     --- a/arch/Config.in
>     +++ b/arch/Config.in
>     @@ -77,6 +77,7 @@ config BR2_aarch64_be
>      
>      config BR2_csky
>      	bool "csky"
>     +	select BR2_ARCH_HAS_NO_TOOLCHAIN_BUILDROOT
>      	select BR2_ARCH_HAS_MMU_MANDATORY
>      	# Most variants are supported by gcc-9+, except one that is
>      	# handled as a special exception in package/gcc/Config.in.host
> 
> When we introduce gcc 12, we can move that down to the individual
> variants if need be...

At least I can build the csky610 toolchain using binutils and gcc csky fork but
building the 5.0.12 kernel requires a small patch to build with host gcc >= 10
(https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=35b34d264cb347909ec89d9fa895900035d5438c)

https://gitlab.com/kubu93/buildroot/-/jobs/1635588173

But with the same toolchain, the build fail with an internal compiler error:

https://gitlab.com/kubu93/buildroot/-/jobs/1635588174
https://gitlab.com/kubu93/buildroot/-/jobs/1635588175
https://gitlab.com/kubu93/buildroot/-/jobs/1635588176

But even with BR2_ARCH_HAS_NO_TOOLCHAIN_BUILDROOT, we have to remove some
qemu_csky* defconfig to not trigger a build job in gitlab.

Best regards,
Romain


> 
> Regards,
> Yann E. MORIN.
> 



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