[PATCH] rust: Fix multiple rlib conflict when building with rust and libstd-rs

[PATCH] rust: Fix multiple rlib conflict when building with rust and libstd-rs

[Yash.Shinde]

From: Yash Shinde <Yash.Shinde@windriver.com>

When building an image with IMAGE_INSTALL:append = ' rust libstd-rs',
a conflict arises due to multiple candidates for the rlib
dependency `std`. This results in the following error:

error[E0464]: multiple candidates for `rlib` dependency `std` found
  |
  = note: candidate #1: /usr/lib/rustlib/x86_64-poky-linux-gnu/lib/libstd-20c3de2d9292cd03.rlib
  = note: candidate #2: /usr/lib/rustlib/x86_64-poky-linux-gnu/lib/libstd.so

The issue seems to be from an extra copy of the rlib as both the recipes
generate the same rlibs, causing conflicts when using std lib to compile
rust programs in the image.

Remove the redundant rlib copy ensuring only the necessary rlib is
present and prevent the conflict.

Signed-off-by: Yash Shinde <Yash.Shinde@windriver.com>
---
 meta/recipes-devtools/rust/rust_1.81.0.bb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/meta/recipes-devtools/rust/rust_1.81.0.bb b/meta/recipes-devtools/rust/rust_1.81.0.bb
index 288b0fbb44..70c2f3fbf8 100644
--- a/meta/recipes-devtools/rust/rust_1.81.0.bb
+++ b/meta/recipes-devtools/rust/rust_1.81.0.bb
@@ -272,6 +272,7 @@ rust_do_install:class-nativesdk() {
     rm ${D}${libdir}/rustlib/install.log
     rm ${D}${libdir}/rustlib/manifest*
     rm ${D}${libdir}/rustlib/${RUST_HOST_SYS}/lib/libstd*.so
+    rm ${D}${libdir}/rustlib/${RUST_HOST_SYS}/lib/libstd-*.rlib
 
     ENV_SETUP_DIR=${D}${base_prefix}/environment-setup.d
     mkdir "${ENV_SETUP_DIR}"
@@ -310,6 +311,7 @@ rust_do_install:class-target() {
     rm ${D}${libdir}/rustlib/install.log
     rm ${D}${libdir}/rustlib/manifest*
     rm ${D}${libdir}/rustlib/${RUST_HOST_SYS}/lib/libstd*.so
+    rm ${D}${libdir}/rustlib/${RUST_HOST_SYS}/lib/libstd-*.rlib
 }
 
 addtask do_update_snapshot after do_patch
-- 
2.43.0

Re: [OE-core] [PATCH] rust: Fix multiple rlib conflict when building with rust and libstd-rs

[Richard Purdie]

On Thu, 2025-02-06 at 02:04 -0800, Yash Shinde via lists.openembedded.org wrote:
> From: Yash Shinde <Yash.Shinde@windriver.com>
> 
> When building an image with IMAGE_INSTALL:append = ' rust libstd-rs',
> a conflict arises due to multiple candidates for the rlib
> dependency `std`. This results in the following error:
> 
> error[E0464]: multiple candidates for `rlib` dependency `std` found
>   |
>   = note: candidate #1: /usr/lib/rustlib/x86_64-poky-linux-gnu/lib/libstd-20c3de2d9292cd03.rlib
>   = note: candidate #2: /usr/lib/rustlib/x86_64-poky-linux-gnu/lib/libstd.so
> 
> The issue seems to be from an extra copy of the rlib as both the recipes
> generate the same rlibs, causing conflicts when using std lib to compile
> rust programs in the image.
> 
> Remove the redundant rlib copy ensuring only the necessary rlib is
> present and prevent the conflict.
> 
> Signed-off-by: Yash Shinde <Yash.Shinde@windriver.com>
> ---
>  meta/recipes-devtools/rust/rust_1.81.0.bb | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/meta/recipes-devtools/rust/rust_1.81.0.bb b/meta/recipes-devtools/rust/rust_1.81.0.bb
> index 288b0fbb44..70c2f3fbf8 100644
> --- a/meta/recipes-devtools/rust/rust_1.81.0.bb
> +++ b/meta/recipes-devtools/rust/rust_1.81.0.bb
> @@ -272,6 +272,7 @@ rust_do_install:class-nativesdk() {
>      rm ${D}${libdir}/rustlib/install.log
>      rm ${D}${libdir}/rustlib/manifest*
>      rm ${D}${libdir}/rustlib/${RUST_HOST_SYS}/lib/libstd*.so
> +    rm ${D}${libdir}/rustlib/${RUST_HOST_SYS}/lib/libstd-*.rlib
>  
>      ENV_SETUP_DIR=${D}${base_prefix}/environment-setup.d
>      mkdir "${ENV_SETUP_DIR}"
> @@ -310,6 +311,7 @@ rust_do_install:class-target() {
>      rm ${D}${libdir}/rustlib/install.log
>      rm ${D}${libdir}/rustlib/manifest*
>      rm ${D}${libdir}/rustlib/${RUST_HOST_SYS}/lib/libstd*.so
> +    rm ${D}${libdir}/rustlib/${RUST_HOST_SYS}/lib/libstd-*.rlib
>  }
>  
>  addtask do_update_snapshot after do_patch

This seems to cause build failures, e.g:

https://autobuilder.yoctoproject.org/valkyrie/#/builders/19/builds/962/steps/11/logs/stdio

"error[E0463]: can't find crate for `std`"

Cheers,

Richard