1 files changed, 19 insertions, 9 deletions

diff --git a/meta/classes-recipe/rust-common.bbclass b/meta/classes-recipe/rust-common.bbclass
index 93bf6c8be6..5e70007377 100644
--- a/meta/classes-recipe/rust-common.bbclass
+++ b/meta/classes-recipe/rust-common.bbclass
@@ -94,7 +94,7 @@ RUST_BUILD_ARCH = "${@oe.rust.arch_to_rust_arch(d.getVar('BUILD_ARCH'))}"
 # Rust additionally will use two additional cases:
 # - undecorated (e.g. CC) - equivalent to TARGET
 # - triple suffix (e.g. CC:x86_64_unknown_linux_gnu) - both
-#   see: https://github.com/alexcrichton/gcc-rs
+#   see: https://github.com/rust-lang/cc-rs
 # The way that Rust's internal triples and Yocto triples are mapped together
 # its likely best to not use the triple suffix due to potential confusion.
 
@@ -125,12 +125,22 @@ create_wrapper_rust () {
         shift
         extras="$1"
         shift
+        crate_cc_extras="$1"
+        shift
 
         cat <<- EOF > "${file}"
         #!/usr/bin/env python3
         import os, sys
         orig_binary = "$@"
         extras = "${extras}"
+
+        # Apply a required subset of CC crate compiler flags
+        # when we build a target recipe for a non-bare-metal target.
+        # https://github.com/rust-lang/cc-rs/blob/main/src/lib.rs#L1614
+        if "CRATE_CC_NO_DEFAULTS" in os.environ.keys() and \
+           "TARGET" in os.environ.keys() and not "-none-" in os.environ["TARGET"]:
+            orig_binary += "${crate_cc_extras}"
+
         binary = orig_binary.split()[0]
         args = orig_binary.split() + sys.argv[1:]
         if extras:
@@ -154,22 +164,22 @@ do_rust_create_wrappers () {
         mkdir -p "${WRAPPER_DIR}"
 
         # Yocto Build / Rust Host C compiler
-        create_wrapper_rust "${RUST_BUILD_CC}" "" "${BUILD_CC}"
+        create_wrapper_rust "${RUST_BUILD_CC}" "" "${CRATE_CC_FLAGS}" "${BUILD_CC}"
         # Yocto Build / Rust Host C++ compiler
-        create_wrapper_rust "${RUST_BUILD_CXX}" "" "${BUILD_CXX}"
+        create_wrapper_rust "${RUST_BUILD_CXX}" "" "${CRATE_CC_FLAGS}" "${BUILD_CXX}"
         # Yocto Build / Rust Host linker
-        create_wrapper_rust "${RUST_BUILD_CCLD}" "" "${BUILD_CCLD}" "${BUILD_LDFLAGS}"
+        create_wrapper_rust "${RUST_BUILD_CCLD}" "" "" "${BUILD_CCLD}" "${BUILD_LDFLAGS}"
         # Yocto Build / Rust Host archiver
-        create_wrapper_rust "${RUST_BUILD_AR}" "" "${BUILD_AR}"
+        create_wrapper_rust "${RUST_BUILD_AR}" "" "" "${BUILD_AR}"
 
         # Yocto Target / Rust Target C compiler
-        create_wrapper_rust "${RUST_TARGET_CC}" "${WRAPPER_TARGET_EXTRALD}" "${WRAPPER_TARGET_CC}" "${WRAPPER_TARGET_LDFLAGS}"
+        create_wrapper_rust "${RUST_TARGET_CC}" "${WRAPPER_TARGET_EXTRALD}" "${CRATE_CC_FLAGS}" "${WRAPPER_TARGET_CC}" "${WRAPPER_TARGET_LDFLAGS}"
         # Yocto Target / Rust Target C++ compiler
-        create_wrapper_rust "${RUST_TARGET_CXX}" "${WRAPPER_TARGET_EXTRALD}" "${WRAPPER_TARGET_CXX}" "${CXXFLAGS}"
+        create_wrapper_rust "${RUST_TARGET_CXX}" "${WRAPPER_TARGET_EXTRALD}" "${CRATE_CC_FLAGS}" "${WRAPPER_TARGET_CXX}" "${CXXFLAGS}"
         # Yocto Target / Rust Target linker
-        create_wrapper_rust "${RUST_TARGET_CCLD}" "${WRAPPER_TARGET_EXTRALD}" "${WRAPPER_TARGET_CCLD}" "${WRAPPER_TARGET_LDFLAGS}"
+        create_wrapper_rust "${RUST_TARGET_CCLD}" "${WRAPPER_TARGET_EXTRALD}" "" "${WRAPPER_TARGET_CCLD}" "${WRAPPER_TARGET_LDFLAGS}"
         # Yocto Target / Rust Target archiver
-        create_wrapper_rust "${RUST_TARGET_AR}" "" "${WRAPPER_TARGET_AR}"
+        create_wrapper_rust "${RUST_TARGET_AR}" "" "" "${WRAPPER_TARGET_AR}"
 
 }