Re: [Buildroot] [PATCH 1/1] package/pkg-cargo.mk: fix building cargo packages on 32bit arm

["Yann E. MORIN" <yann.morin.1998@free.fr>]

Moritz, All,

On 2022-02-18 00:06 +0100, Moritz Bitsch via buildroot spake thusly:
> From: Moritz Bitsch <moritz@h6t.eu>
> 
> there are duplicated symbols between rustc and gcc. Specifying
> --allow-multiple-definition to the linker as workaround until
> rustc is fixed.
> 
> rust-lang issue: https://github.com/rust-lang/compiler-builtins/issues/420

This is supposedly fixed upstream:
    https://github.com/rust-lang/compiler-builtins/issues/420

which leads to:
    https://github.com/rust-lang/compiler-builtins/issues/412

which leads to:
    https://github.com/rust-lang/compiler-builtins/pull/452

and:
    https://github.com/rust-lang/rust/pull/93696

which is now merged.

We recently bumped to using rust 1.62.0.

Do you think that this workaround can now be dropped?

Regards,
Yann E. MORIN.

> Fixes: http://autobuild.buildroot.net/results/53f/53f5598b8e520caaa135fb4923c09da382dab329
> Signed-off-by: Moritz Bitsch <moritz@h6t.eu>
> ---
>  package/pkg-cargo.mk | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/package/pkg-cargo.mk b/package/pkg-cargo.mk
> index e74a8358bc..71d695d926 100644
> --- a/package/pkg-cargo.mk
> +++ b/package/pkg-cargo.mk
> @@ -46,6 +46,14 @@ PKG_CARGO_ENV = \
>  	CARGO_BUILD_TARGET="$(RUSTC_TARGET_NAME)" \
>  	CARGO_TARGET_$(call UPPERCASE,$(RUSTC_TARGET_NAME))_LINKER=$(notdir $(TARGET_CROSS))gcc
>  
> +#
> +# This is a workaround for https://github.com/rust-lang/compiler-builtins/issues/420
> +# and should be removed when fixed upstream
> +#
> +ifeq ($(NORMALIZED_ARCH),arm)
> +	PKG_CARGO_ENV += RUSTFLAGS="-Clink-arg=-Wl,--allow-multiple-definition"
> +endif
> +
>  HOST_PKG_CARGO_ENV = \
>  	$(PKG_COMMON_CARGO_ENV)
>  
> -- 
> 2.35.1
> 
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