Make cdylib crate type optional

Author: filmor

rustls-platform-verifier/Cargo.toml

@@ -11,15 +11,15 @@ rust-version = "1.71.0"
 
 [lib]
 name = "rustls_platform_verifier"
-# Note: The `cdylib` specification is for testing only. The shared library
-# is not expected to have a stable API.
-crate-type = ["cdylib", "rlib"]
 
 [features]
+# Note: The `cdylib` specification is for testing only. The shared library
+# is not expected to have a stable API.
+cdylib = []
 # Enables a C interface to use for testing where `cargo` can't be used.
 # This feature is not stable, nor is the interface exported when it is enabled.
 # Do not rely on this or use it in production.
-ffi-testing = ["android_logger", "rustls/ring"]
+ffi-testing = ["cdylib", "android_logger", "rustls/ring"]
 # Enables APIs that expose lower-level verifier types for debugging purposes.
 dbg = []
 # Enables `log::debug` base64-encoded logging of all end-entity certificates processed

rustls-platform-verifier/src/lib.rs

@@ -2,6 +2,8 @@
 #![doc = include_str!("../README.md")]
 #![warn(missing_docs)]
 
+#![cfg_attr(feature = "cdylib", crate_type = "cdylib")]
+
 use std::sync::Arc;
 
 #[cfg(feature = "dbg")]