rust-cross-canadian: set CARGO_TARGET_<triple>_RUSTFLAGS

Avoid setting sdk-wide RUSTFLAGS as these flags only are valid when
building for target.
This will enable building for different targets with different
RUSTFLAGS.

(From OE-Core rev: 25627606aadacae3a2ab805a6098c81fed154b27)

Signed-off-by: Sean Nyekjaer <sean@geanix.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/meta/recipes-devtools/rust/rust-cross-canadian.inc b/meta/recipes-devtools/rust/rust-cross-canadian.inc
index d569ac59f5..d25646237c 100644
--- a/meta/recipes-devtools/rust/rust-cross-canadian.inc
+++ b/meta/recipes-devtools/rust/rust-cross-canadian.inc
@@ -54,8 +54,10 @@ do_install () {
     mkdir "${ENV_SETUP_DIR}"
     RUST_ENV_SETUP_SH="${ENV_SETUP_DIR}/rust.sh"
 
+    RUST_TARGET_TRIPLE=`echo ${RUST_TARGET_SYS} | tr '[:lower:]' '[:upper:]' | sed 's/-/_/g'`
+
     cat <<- EOF > "${RUST_ENV_SETUP_SH}"
-        export RUSTFLAGS="--sysroot=\$OECORE_TARGET_SYSROOT/usr -C link-arg=--sysroot=\$OECORE_TARGET_SYSROOT"
+        export CARGO_TARGET_${RUST_TARGET_TRIPLE}_RUSTFLAGS="--sysroot=\$OECORE_TARGET_SYSROOT/usr -C link-arg=--sysroot=\$OECORE_TARGET_SYSROOT"
         export RUST_TARGET_PATH="\$OECORE_NATIVE_SYSROOT/usr/lib/${TARGET_SYS}/rustlib"
         EOF