Add feature flags for static builds (#4691)

.github/workflows/cargo.yml

@@ -17,6 +17,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest, macos-latest-xlarge]
+        features: ["", "--features static"]
     runs-on: ${{ matrix.os }}
     name: Cargo
     steps:
@@ -41,8 +42,8 @@ jobs:
       if: runner.os == 'Linux'
       run: curl https://sh.rustup.rs -sSf | sh -s -- -y
     - name: Cargo build
-      run: cargo build --all
+      run: cargo build --all ${{ matrix.features }}
     - name: Cargo test
-      run: cargo test --all
+      run: cargo test --all ${{ matrix.features }}
     - name: Cargo Publish (dry run)
       run: cargo publish --dry-run --allow-dirty

Cargo.toml

@@ -44,6 +44,10 @@ include = [
     "/THIRD-PARTY-NOTICES",
 ]
 
+[features]
+default = []
+static = []
+
 [build-dependencies]
 cmake = "0.1"
 

scripts/build.rs

@@ -13,13 +13,19 @@ fn main() {
     }
 
     let target = env::var("TARGET").unwrap();
+    let out_dir = env::var("OUT_DIR").unwrap();
+    // The output directory for the native MsQuic library.
+    let quic_output_dir = Path::new(&out_dir).join("lib");
 
     // Builds the native MsQuic and installs it into $OUT_DIR.
     let mut config = Config::new(".");
     config
         .define("QUIC_ENABLE_LOGGING", logging_enabled)
         .define("QUIC_TLS", "openssl")
-        .define("QUIC_OUTPUT_DIR", "../lib");
+        .define("QUIC_OUTPUT_DIR", quic_output_dir.to_str().unwrap());
+    if cfg!(feature = "static") {
+        config.define("QUIC_BUILD_SHARED", "off");
+    }
 
     // macos-latest's cargo automatically specify --target=${ARCH}-apple-macosx14.5
     // which conflicts with -mmacosx-version-min=${CMAKE_OSX_DEPLOYMENT_TARGET}.
@@ -38,4 +44,19 @@ fn main() {
     let dst = config.build();
     let lib_path = Path::join(Path::new(&dst), Path::new(path_extra));
     println!("cargo:rustc-link-search=native={}", lib_path.display());
+    if cfg!(feature = "static") {
+        if cfg!(target_os = "linux") {
+            let numa_lib_path = match target.as_str() {
+                "x86_64-unknown-linux-gnu" => "/usr/lib/x86_64-linux-gnu",
+                "aarch64-unknown-linux-gnu" => "/usr/lib/aarch64-linux-gnu",
+                _ => panic!("Unsupported target: {}", target),
+            };
+            println!("cargo:rustc-link-search=native={}", numa_lib_path);
+            println!("cargo:rustc-link-lib=static:+whole-archive=numa");
+        } else if cfg!(target_os = "macos") {
+            println!("cargo:rustc-link-lib=framework=CoreFoundation");
+            println!("cargo:rustc-link-lib=framework=Security");
+        }
+        println!("cargo:rustc-link-lib=static=msquic");
+    }
 }