chore: enable doc_auto_cfg

Fixes #1498.

Author: kchibisov

glutin/Cargo.toml

@@ -57,3 +57,14 @@ objc = "0.2.7"
 
 [build-dependencies]
 cfg_aliases = "0.1.1"
+
+[package.metadata.docs.rs]
+rustdoc-args = ["--cfg", "docsrs"]
+targets = [
+    "aarch64-linux-android",
+    "x86_64-unknown-linux-gnu",
+    "x86_64-pc-windows-msvc",
+    "x86_64-apple-darwin",
+    "i686-unknown-linux-gnu",
+    "i686-pc-windows-msvc",
+]

glutin/src/lib.rs

@@ -18,6 +18,7 @@
 #![deny(missing_debug_implementations)]
 #![deny(missing_docs)]
 #![cfg_attr(feature = "cargo-clippy", deny(warnings))]
+#![cfg_attr(docsrs, feature(doc_auto_cfg))]
 
 #[cfg(all(not(egl_backend), not(glx_backend), not(wgl_backend), not(cgl_backend)))]
 compile_error!("Please select at least one api backend");