Linux build support (#2290)

.github/workflows/clippy.yml

@@ -101,6 +101,7 @@ jobs:
           cargo clippy -p test_reserved &&
           cargo clippy -p test_resources &&
           cargo clippy -p test_return_struct &&
+          cargo clippy -p test_simple_component &&
           cargo clippy -p test_string_param &&
           cargo clippy -p test_structs &&
           cargo clippy -p test_sys &&

.github/workflows/linux.yml

@@ -0,0 +1,22 @@
+name: linux
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+
+env:
+  RUSTFLAGS: -Dwarnings
+
+jobs:
+  cargo_windows:
+    name: Check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Update toolchain
+        run: rustup update --no-self-update stable && rustup default stable
+      - name: Run cargo build
+        run: cargo build -p test_simple_component --target x86_64-unknown-linux-gnu

.github/workflows/test.yml

@@ -132,8 +132,8 @@ jobs:
           cargo test --target ${{ matrix.target }} -p test_enums &&
           cargo test --target ${{ matrix.target }} -p test_error &&
           cargo test --target ${{ matrix.target }} -p test_event &&
-          cargo clean &&
           cargo test --target ${{ matrix.target }} -p test_extensions &&
+          cargo clean &&
           cargo test --target ${{ matrix.target }} -p test_handles &&
           cargo test --target ${{ matrix.target }} -p test_helpers &&
           cargo test --target ${{ matrix.target }} -p test_implement &&
@@ -151,6 +151,7 @@ jobs:
           cargo test --target ${{ matrix.target }} -p test_reserved &&
           cargo test --target ${{ matrix.target }} -p test_resources &&
           cargo test --target ${{ matrix.target }} -p test_return_struct &&
+          cargo test --target ${{ matrix.target }} -p test_simple_component &&
           cargo test --target ${{ matrix.target }} -p test_string_param &&
           cargo test --target ${{ matrix.target }} -p test_structs &&
           cargo test --target ${{ matrix.target }} -p test_sys &&

crates/libs/windows/src/core/mod.rs

@@ -144,7 +144,7 @@ macro_rules! link {
     )
 }
 
-#[cfg(not(windows_raw_dylib))]
+#[cfg(all(windows, not(windows_raw_dylib)))]
 #[macro_export]
 #[doc(hidden)]
 macro_rules! link {
@@ -156,4 +156,15 @@ macro_rules! link {
     )
 }
 
+#[cfg(all(not(windows), not(windows_raw_dylib)))]
+#[macro_export]
+#[doc(hidden)]
+macro_rules! link {
+    ($library:literal $abi:literal fn $name:ident($($arg:ident: $argty:ty),*)->$ret:ty) => (
+        extern $abi {
+            pub fn $name($($arg: $argty),*) -> $ret;
+        }
+    )
+}
+
 pub use crate::link;

crates/tests/component/src/lib.rs

@@ -44,7 +44,7 @@ impl IActivationFactory_Impl for ClassFactory {
 }
 
 #[no_mangle]
-unsafe extern "stdcall" fn DllGetActivationFactory(name: ManuallyDrop<HSTRING>, result: *mut *mut std::ffi::c_void) -> HRESULT {
+unsafe extern "system" fn DllGetActivationFactory(name: ManuallyDrop<HSTRING>, result: *mut *mut std::ffi::c_void) -> HRESULT {
     let factory: Option<IActivationFactory> = match name.unwrap().to_string().as_str() {
         "test_component.Class" => Some(ClassFactory.into()),
         _ => None,

crates/tests/simple_component/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "test_simple_component"
+version = "0.0.0"
+edition = "2018"
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies.windows]
+path = "../../libs/windows"
+features = [
+    "Win32_Foundation",
+]

crates/tests/simple_component/src/lib.rs

@@ -0,0 +1,7 @@
+use windows::{core::*, Win32::Foundation::*};
+
+#[no_mangle]
+unsafe extern "system" fn DllGetActivationFactory(_name: ManuallyDrop<HSTRING>, result: *mut *mut std::ffi::c_void) -> HRESULT {
+    *result = std::ptr::null_mut();
+    CLASS_E_CLASSNOTAVAILABLE
+}