[OE-core][PATCH 1/3] rust-cross-canadian: set CARGO_TARGET_<triple>_RUSTFLAGS

[Sean Nyekjaer <sean@geanix.com>]

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.

Signed-off-by: Sean Nyekjaer <sean@geanix.com>
---
 meta/recipes-devtools/rust/rust-cross-canadian.inc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

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
 
-- 
2.42.0