Add CI for testing x86_64-pc-windows-gnu (#386)

* Add CI for testing x86_64-pc-windows-gnu

* Fix GH job condition

.github/workflows/cross.yml

@@ -96,3 +96,20 @@ jobs:
           target: x86_64-apple-ios
       - name: Build for `x86_64-apple-ios`
         run: cargo build -p aws-lc-rs --target x86_64-apple-ios --features bindgen
+
+  aws-lc-rs-windows-mingw:
+    if: github.repository_owner == 'aws'
+    name: x86_64-pc-windows-gnu
+    runs-on: windows-latest
+    steps:
+      - uses: ilammy/setup-nasm@v1
+      - uses: actions/checkout@v3
+        with:
+          submodules: 'recursive'
+      - uses: dtolnay/rust-toolchain@master
+        id: toolchain
+        with:
+          toolchain: stable
+          target: x86_64-pc-windows-gnu
+      - name: Test on `x86_64-pc-windows-gnu`
+        run: cargo test -p aws-lc-rs --target x86_64-pc-windows-gnu --features bindgen

aws-lc-fips-sys/builder/cmake_builder.rs

@@ -32,6 +32,10 @@ fn test_ninja_command() -> bool {
         || test_command("ninja-build".as_ref(), &["--version".as_ref()]).status
 }
 
+fn test_nasm_command() -> bool {
+    test_command("nasm".as_ref(), &["-version".as_ref()]).status
+}
+
 fn find_cmake_command() -> Option<&'static OsStr> {
     if test_command("cmake3".as_ref(), &["--version".as_ref()]).status {
         Some("cmake3".as_ref())
@@ -195,6 +199,10 @@ impl crate::Builder for CmakeBuilder {
             eprintln!("Missing dependency: perl is required for FIPS.");
             missing_dependency = true;
         }
+        if target_os() == "windows" && target_arch() == "x86_64" && !test_nasm_command() {
+            eprintln!("Missing dependency: nasm is required for FIPS.");
+            missing_dependency = true;
+        }
         if let Some(cmake_cmd) = find_cmake_command() {
             env::set_var("CMAKE", cmake_cmd);
         } else {

aws-lc-sys/builder/cmake_builder.rs

@@ -14,6 +14,10 @@ pub(crate) struct CmakeBuilder {
     output_lib_type: OutputLibType,
 }
 
+fn test_nasm_command() -> bool {
+    test_command("nasm".as_ref(), &["-version".as_ref()]).status
+}
+
 fn find_cmake_command() -> Option<&'static OsStr> {
     if test_command("cmake3".as_ref(), &["--version".as_ref()]).status {
         Some("cmake3".as_ref())
@@ -149,6 +153,10 @@ impl crate::Builder for CmakeBuilder {
             eprintln!("Missing dependency: cmake");
             missing_dependency = true;
         };
+        if target_os() == "windows" && target_arch() == "x86_64" && !test_nasm_command() {
+            eprintln!("Missing dependency: nasm");
+            missing_dependency = true;
+        }
 
         if missing_dependency {
             return Err("Required build dependency is missing. Halting build.".to_owned());