Add simple Windows CI workflow check (#2663)

* Add simple Windows CI workflow check

* Fix Windows build in CI

* Windows fix

.github/workflows/rust.yml

@@ -153,3 +153,24 @@ jobs:
         uses: Swatinem/rust-cache@v2
       - run: cargo check --features wgpu --target aarch64-linux-android
         working-directory: crates/eframe
+
+  windows:
+    name: Check Windows
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: 1.65.0
+          override: true
+
+      - name: Set up cargo cache
+        uses: Swatinem/rust-cache@v2
+
+      - name: Check
+        uses: actions-rs/cargo@v1
+        with:
+          command: check
+          args: --all-targets --all-features
+

Cargo.toml

@@ -27,7 +27,8 @@ opt-level = 2 # fast and small wasm, basically same as `opt-level = 's'`
 
 
 [profile.dev]
-split-debuginfo = "unpacked" # faster debug builds on mac
+# Can't leave this on by default, because it breaks the Windows build. Related: https://github.com/rust-lang/cargo/issues/4897
+# split-debuginfo = "unpacked" # faster debug builds on mac
 # opt-level = 1                # Make debug builds run faster
 
 # Optimize all dependencies even in debug builds (does not affect workspace packages):

crates/eframe/src/native/epi_integration.rs

@@ -172,7 +172,7 @@ fn window_builder_drag_and_drop(
     enable: bool,
 ) -> winit::window::WindowBuilder {
     use winit::platform::windows::WindowBuilderExtWindows as _;
-    build_window.with_drag_and_drop(enable)
+    window_builder.with_drag_and_drop(enable)
 }
 
 #[cfg(not(target_os = "windows"))]

crates/egui_glow/examples/pure_glow.rs

@@ -29,7 +29,7 @@ impl GlutinWindowContext {
 
         // try egl and fallback to windows wgl. Windows is the only platform that *requires* window handle to create display.
         #[cfg(target_os = "windows")]
-        let preference = glutin::display::DisplayApiPreference::EglThenWgl(Some(window_handle));
+        let preference = glutin::display::DisplayApiPreference::EglThenWgl(Some(raw_window_handle));
         // try egl and fallback to x11 glx
         #[cfg(target_os = "linux")]
         let preference = glutin::display::DisplayApiPreference::EglThenGlx(Box::new(