cargo-cross-canadian: Use SDK's flags during target linking

(From OE-Core rev: abb1f3f12b4a02d644414b1af0623894984bb4cd)

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/cargo/cargo-cross-canadian.inc

@@ -39,6 +39,18 @@ do_compile:prepend () {
 	PKG_CONFIG_PATH="${RECIPE_SYSROOT_NATIVE}/usr/lib/pkgconfig:${PKG_CONFIG_PATH}"
 }
 
+create_sdk_wrapper () {
+        file="$1"
+        shift
+
+        cat <<- EOF > "${file}"
+		#!/bin/sh
+		\$$1 \$@
+		EOF
+
+        chmod +x "$file"
+}
+
 do_install () {
     SYS_BINDIR=$(dirname ${D}${bindir})
     install -d "${SYS_BINDIR}"
@@ -47,6 +59,9 @@ do_install () {
 	chrpath -r "\$ORIGIN/../lib" ${i}
     done
 
+    # Uses SDK's CC as linker so linked binaries works out of box.
+    create_sdk_wrapper "${SYS_BINDIR}/target-rust-ccld" "CC"
+
     ENV_SETUP_DIR=${D}${base_prefix}/environment-setup.d
     mkdir "${ENV_SETUP_DIR}"
     ENV_SETUP_SH="${ENV_SETUP_DIR}/cargo.sh"
@@ -58,7 +73,10 @@ do_install () {
 		touch "\$CARGO_HOME/config"
 		echo "[build]" >> "\$CARGO_HOME/config"
 		echo 'target = "'${TARGET_SYS}'"' >> "\$CARGO_HOME/config"
-        fi
+		echo '# TARGET_SYS' >> "\$CARGO_HOME/config"
+		echo '[target.'${TARGET_SYS}']' >> "\$CARGO_HOME/config"
+		echo 'linker = "target-rust-ccld"' >> "\$CARGO_HOME/config"
+    fi
 
 	# Keep the below off as long as HTTP/2 is disabled.
 	export CARGO_HTTP_MULTIPLEXING=false