feat(android): set the Cargo target linker

Author: ririv

cibuildwheel/platforms/android.py

@@ -340,8 +340,6 @@ def localized_vars(
 def setup_android_env(
     config: PythonConfiguration, python_dir: Path, venv_dir: Path, build_env: dict[str, str]
 ) -> dict[str, str]:
-    setup_rust_cross_compile(config, build_env)
-
     site_packages = next(venv_dir.glob("lib/python*/site-packages"))
     for suffix in ["pth", "py"]:
         shutil.copy(resources.PATH / f"_cross_venv.{suffix}", site_packages)
@@ -354,14 +352,17 @@ def setup_android_env(
     )
     sysconfigdata = localize_sysconfigdata(python_dir, build_env, sysconfigdata_path)
 
-    # Activate the code in _cross_venv.py.
-    android_env = build_env.copy()
-    android_env["CIBW_HOST_TRIPLET"] = android_triplet(config.identifier)
-
     # Get the environment variables needed to build for Android (CC, CFLAGS, etc). These are
     # generated by https://github.com/python/cpython/blob/main/Android/android-env.sh.
     env_output = call(python_dir / "android.py", "env", env=build_env, capture_stdout=True)
 
+    # Cargo target linker need to be specified after CC is set
+    setup_rust_cross_compile(config, build_env)
+
+    # Activate the code in _cross_venv.py.
+    android_env = build_env.copy()
+    android_env["CIBW_HOST_TRIPLET"] = android_triplet(config.identifier)
+
     # shlex.split should produce a sequence alternating between:
     #   * the word "export"
     #   * a key=value string, without quotes
@@ -405,8 +406,10 @@ def setup_rust_cross_compile(
             log.notice("Not overriding CARGO_BUILD_TARGET as it has already been set")
         # No message if it was set to what we were planning to set it to
     elif cargo_target:
-        log.notice(f"Setting CARGO_BUILD_TARGET={cargo_target} for cross-compilation")
+        cargo_target_linker_env_name = f"CARGO_TARGET_{cargo_target.upper().replace('-', '_')}_LINKER"
+        log.notice(f"Setting CARGO_BUILD_TARGET={cargo_target} and  setting {cargo_target_linker_env_name} for cross-compilation")
         env["CARGO_BUILD_TARGET"] = cargo_target
+        env["cargo_target_linker_env_name"] = os.environ.get("CC")
     else:
         log.warning(f"Unable to configure Rust cross-compilation for architecture {cargo_target}")