[Buildroot] [PATCH v2] package/python-orjson: disallow build when using musl.

[Yann E. MORIN]

Graeme, All,

On 2022-05-19 09:02 -0700, Graeme Smecher spake thusly:
> The python-orjson build bails as follows when using musl libc:
> 
> 	error: cannot produce cdylib for `orjson v3.6.7 (...)` as the
> 	target `i586-unknown-linux-musl` does not support these crate types

I could not reproduce such an error wit the following defconfig:

    BR2_TOOLCHAIN_BUILDROOT_MUSL=y
    BR2_TOOLCHAIN_BUILDROOT_CXX=y
    BR2_PER_PACKAGE_DIRECTORIES=y
    BR2_PACKAGE_PYTHON3=y
    BR2_PACKAGE_PYTHON_ORJSON=y

Since you submitted this patch, pythn-orjson was bumped multiple times,
and we've also bumped rust to 1.66.1, so maybe that was fixed now.

Could you have a further look into this, please?

Regards,
Yann E. MORIN.

> It's not machine-specific (it occurs on i586, s389x, and arm platforms),
> and is tied to what appears to be relatively arcane details for
> rust/musl:
> 
> 	https://github.com/rust-lang/rust/issues/59302
> 
> At some point, it will be possible to remove this restriction - but not
> yet.
> 
> Signed-off-by: Graeme Smecher <gsmecher at threespeedlogic.com>
> ---
>  package/python-orjson/Config.in | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/package/python-orjson/Config.in b/package/python-orjson/Config.in
> index 420e023b0a..b2ad9062cc 100644
> --- a/package/python-orjson/Config.in
> +++ b/package/python-orjson/Config.in
> @@ -1,6 +1,8 @@
>  config BR2_PACKAGE_PYTHON_ORJSON
>  	bool "python-orjson"
>  	depends on BR2_PACKAGE_HOST_RUSTC_TARGET_ARCH_SUPPORTS
> +	# doesn't build with musl until rust's cdylib targets work with it
> +	depends on !BR2_TOOLCHAIN_USES_MUSL
>  	select BR2_PACKAGE_PYTHON_CFFI # runtime
>  	help
>  	  orjson is a fast, correct JSON library for Python. It
> @@ -10,3 +12,6 @@ config BR2_PACKAGE_PYTHON_ORJSON
>  	  instances natively.
>  
>  	  https://github.com/ijl/orjson
> +
> +comment "python-orjson requires rust cdylib support, which musl doesn't have yet"
> +	depends on BR2_TOOLCHAIN_USES_MUSL
> -- 
> 2.35.1
> 
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