spec: allow setting ldflags

src/spec/index.ts

@@ -62,13 +62,15 @@ const writeFile = promisify(fs.writeFile);
 
 export interface ConfigOptions {
     gccdir: string;
-    optimize: string;
+    optimize: string[];
+    ldflags: string[];
 }
 
 export function renderConfig(options: ConfigOptions) {
     return `# Rendered from TypeScript ${new Date().toLocaleString()}, do not edit!\n\n\n` + specTemplate
         .replace("@@GCCDIR@@", options.gccdir)
-        .replace("@@OPTIMIZE@@", options.optimize);
+        .replace("@@OPTIMIZE@@", options.optimize.join(' '))
+        .replace("@@LDFLAGS@@", options.ldflags.join(' '));
 }