Fix Swift runtime not being initialized on Linux

build.rs

@@ -11,8 +11,15 @@ fn main() {
         target.paths.runtime_library_paths.iter().for_each(|path| {
             println!("cargo:rustc-link-arg=-Wl,-rpath={}", path);
         });
-        // need to link against libswiftCore and libFoundation
 
+        // link in swiftrt.o, which initializes the swift runtime
+        let arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap();
+        println!(
+            "cargo:rustc-link-arg={}/linux/{}/swiftrt.o",
+            &target.paths.runtime_resource_path, arch
+        );
+
+        // link against the swift stdlib and all th supporting pieces
         println!("cargo:rustc-link-lib=dylib=BlocksRuntime");
         println!("cargo:rustc-link-lib=dylib=dispatch");
         println!("cargo:rustc-link-lib=dylib=FoundationNetworking");
@@ -59,6 +66,7 @@ pub struct SwiftTargetInfo {
 #[serde(rename_all = "camelCase")]
 pub struct SwiftPaths {
     pub runtime_library_paths: Vec<String>,
+    pub runtime_resource_path: String,
 }
 
 #[derive(Debug, Deserialize)]

highlight-swift/Sources/highlight-swift/highlight_swift.swift

@@ -7,15 +7,7 @@ public func highlight(codePtr: UnsafePointer<UInt8>, codeLen: UInt64, htmlLenPtr
     let data = Data(buffer: buf)
     let code = String(data: data, encoding: .utf8)!
     
-    print("a")
-    debugPrint(MyOutputFormat())
     let highligher = SyntaxHighlighter(format: MyOutputFormat())
-    withUnsafePointer(to: highligher) { ptr in
-        debugPrint(UnsafeRawPointer(ptr))
-    }
-    print("b")
-    debugPrint(highligher)
-    debugPrint(code)
     var html = highligher.highlight(code)
     let outPtr = UnsafeMutableBufferPointer<UInt8>.allocate(capacity: html.utf8.count)
     _ = html.withUTF8 { buf in