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On Fri, 2026-08-07 at 02:31 -0700, Sadineni, Harish via lists.openembedded.org wrote:

From: Harish Sadineni <Harish.Sadineni@windriver.com>

YOCTO [#15061]

Fixes 32-bit Cargo build failures when using multilib-enabled SDKs.

Store the generated environment setup script in a target-specific
subdirectory so that sourcing the SDK environment always loads the
matching script for the selected target, avoiding accidental reuse of
the 64-bit configuration when building for a 32-bit target.

Also update `CARGO_TARGET_<TRIPLE>_RUSTFLAGS` to add an explicit
`-L` search path to the target `rustlib` directory inside the sysroot.
This ensures Cargo can locate the correct target-specific Rust libraries
during cross-compilation with the cross-canadian toolchain.

Signed-off-by: Harish Sadineni <Harish.Sadineni@windriver.com>
---
 meta/recipes-devtools/rust/rust-cross-canadian.inc | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/meta/recipes-devtools/rust/rust-cross-canadian.inc b/meta/recipes-devtools/rust/rust-cross-canadian.inc
index f083bcda82..bdc63e221f 100644
--- a/meta/recipes-devtools/rust/rust-cross-canadian.inc
+++ b/meta/recipes-devtools/rust/rust-cross-canadian.inc
@@ -51,15 +51,17 @@ do_install () {
     chmod +x "$outfile"
     create_sdk_wrapper "${SYS_BINDIR}/target-rust-ccld-wrapper" "CC"

-    ENV_SETUP_DIR=${D}${base_prefix}/environment-setup.d
-    mkdir "${ENV_SETUP_DIR}"
+    ENV_SETUP_DIR=${D}${base_prefix}/environment-setup.d/${TARGET_SYS}
+    mkdir -p "${ENV_SETUP_DIR}"
     RUST_ENV_SETUP_SH="${ENV_SETUP_DIR}/${RUST_TARGET_SYS}_rust.sh"

     RUST_TARGET_TRIPLE=`echo ${RUST_TARGET_SYS} | tr '[:lower:]' '[:upper:]' | sed 's/-/_/g'`

     cat <<- EOF > "${RUST_ENV_SETUP_SH}"
-     export CARGO_TARGET_${RUST_TARGET_TRIPLE}_RUSTFLAGS="--sysroot=\$OECORE_TARGET_SYSROOT/usr -C link-arg=--sysroot=\$OECORE_TARGET_SYSROOT"
-     export CARGO_BUILD_TARGET="${RUST_TARGET_SYS}"
+     export RUST_TARGET_SYS_VALUE="${RUST_TARGET_SYS}"
+     LIB_PATH="\$OECORE_TARGET_SYSROOT/usr/${baselib}/rustlib/${RUST_TARGET_SYS}/lib"
+     export CARGO_TARGET_${RUST_TARGET_TRIPLE}_RUSTFLAGS="--sysroot=\$OECORE_TARGET_SYSROOT/usr -C link-arg=--sysroot=\$OECORE_TARGET_SYSROOT -L \$LIB_PATH"
+        export CARGO_BUILD_TARGET="${RUST_TARGET_SYS}"
      export RUST_TARGET_PATH="\$OECORE_NATIVE_SYSROOT/usr/lib/${TARGET_SYS}/rustlib"
      EOF

I'm a bit confused here. The script in question already has
${RUST_TARGET_SYS} in its name, so it is already target specific. Why
do we need to move it to a target specific directory?

Cheers,

Richard