[GN]: Support for loadable modules

tools/gn/target.h

Index: tools/gn/target.h
diff --git a/tools/gn/target.h b/tools/gn/target.h
index a9832416f1ba223abb01c4f38bc344f44bd29d48..699c156a0a9552c9413ca696cd10c42932ab51b7 100644
--- a/tools/gn/target.h
+++ b/tools/gn/target.h
@@ -115,6 +115,20 @@ class Target : public Item {
   bool testonly() const { return testonly_; }
   void set_testonly(bool value) { testonly_ = value; }
 
+  // Whether this target should produce a bundle on Darwin platforms. A bundle
+  // is a directory with a standardized hierarchical structure that holds
+  // executable code and the resources used by that code. Examples are
+  // application bundles (.app) or framework bundles (.framework) with the
+  // former corresponding to executables and the latter to shared libraries.
+  bool darwin_bundle() const { return darwin_bundle_; }
+  void set_darwin_bundle(bool value) { darwin_bundle_ = value; }
+
+  // Whether this target should produce a loadable module. On Darwin platforms,
+  // a loadable module is roughly the same as a .dylib, but it cannot be linked
+  // at compile time. It must be dynamically loaded at runtime.
+  bool loadable_module() const { return loadable_module_; }
+  void set_loadable_module(bool value) { loadable_module_ = value; }
+
   // Compile-time extra dependencies.
   const FileList& inputs() const { return inputs_; }
   FileList& inputs() { return inputs_; }
@@ -288,6 +302,8 @@ class Target : public Item {
   bool check_includes_;
   bool complete_static_lib_;
   bool testonly_;
+  bool darwin_bundle_;
+  bool loadable_module_;
   FileList inputs_;
   std::vector<std::string> data_;