Address PR review

Author: Byron

Cargo.toml

@@ -63,11 +63,11 @@ rust_backend = ["miniz_oxide", "any_impl"]
 ## Use the system's installed zlib library.
 ## This is useful when you need compatibility with other C code that uses zlib,
 ## or when you want to use the system-provided zlib for consistency.
-zlib = ["any_zlib", "any_c_zlib", "libz-sys"]
+zlib = ["any_c_zlib", "libz-sys"]
 
 ## Use the system's installed zlib library with default features enabled.
 ## Similar to `zlib` but enables additional features from libz-sys.
-zlib-default = ["any_zlib", "any_c_zlib", "libz-sys/default"]
+zlib-default = ["any_c_zlib", "libz-sys/default"]
 
 ## Use zlib-ng in zlib-compat mode via libz-sys.
 ## This provides zlib-ng's performance improvements while maintaining compatibility.
@@ -78,18 +78,18 @@ zlib-default = ["any_zlib", "any_c_zlib", "libz-sys/default"]
 ## See [the libz-sys README](https://github.com/rust-lang/libz-sys/blob/main/README.md) for details.
 ## To avoid that, use the `"zlib-ng"` feature instead.
 
-zlib-ng-compat = ["any_zlib", "zlib", "libz-sys/zlib-ng"]
+zlib-ng-compat = ["zlib", "libz-sys/zlib-ng"]
 
 ## Use the high-performance zlib-ng library directly.
 ## This typically provides better performance than stock zlib and works even when
 ## other dependencies use zlib. Requires a C compiler.
-zlib-ng = ["any_zlib", "any_c_zlib", "libz-ng-sys"]
+zlib-ng = ["any_c_zlib", "libz-ng-sys"]
 
 ## Use Cloudflare's optimized zlib implementation.
 ## This provides better performance than stock zlib on x86-64 (with SSE 4.2) and ARM64 (with NEON & CRC).
 ## * ⚠ Does not support 32-bit CPUs and is incompatible with mingw.
 ## * ⚠ May cause conflicts if other crates use different zlib versions.
-cloudflare_zlib = ["any_zlib", "any_c_zlib", "cloudflare-zlib-sys"]
+cloudflare_zlib = ["any_c_zlib", "cloudflare-zlib-sys"]
 
 ## Deprecated alias for `rust_backend`, provided for backwards compatibility.
 ## Use `rust_backend` instead.
@@ -107,7 +107,7 @@ any_zlib = ["any_impl"]
 ## **Internal:** Marker feature indicating that any C based fully zlib compatible backend is enabled.
 ## This is automatically enabled by `zlib`, `zlib-ng`, `zlib-ng-compat`, and `cloudflare_zlib`.
 ## Do not enable this feature directly; instead, choose a specific backend feature.
-any_c_zlib = ["any_impl"]
+any_c_zlib = ["any_zlib"]
 
 ## **Internal:** Marker feature indicating that any compression backend is enabled.
 ## This is automatically enabled by all backend features to ensure at least one implementation is available.

src/ffi/mod.rs

@@ -65,13 +65,13 @@ mod c;
 #[cfg(feature = "any_c_zlib")]
 pub use self::c::*;
 
-// Prefer C backes when both Rust backends are enabled to avoid duplicate exports.
+// Only bring in `zlib-rs` if there is no C-based backend.
 #[cfg(all(not(feature = "any_c_zlib"), feature = "zlib-rs"))]
 mod zlib_rs;
 #[cfg(all(not(feature = "any_c_zlib"), feature = "zlib-rs"))]
 pub use self::zlib_rs::*;
 
-// Use to miniz_oxide when no fully compliant zlib is selected.
+// Use miniz_oxide when no fully compliant zlib is selected.
 #[cfg(all(not(feature = "any_zlib"), feature = "miniz_oxide"))]
 mod miniz_oxide;
 #[cfg(all(not(feature = "any_zlib"), feature = "miniz_oxide"))]