[GN]: Support for loadable modules

tools/gn/binary_target_generator.cc

Index: tools/gn/binary_target_generator.cc
diff --git a/tools/gn/binary_target_generator.cc b/tools/gn/binary_target_generator.cc
index 923d0edd7a95f37ac66538e62a67cefcf68aac52..3c2a3050b198bb5111cc49541dcfa668ac29d458 100644
--- a/tools/gn/binary_target_generator.cc
+++ b/tools/gn/binary_target_generator.cc
@@ -55,6 +55,9 @@ void BinaryTargetGenerator::DoRun() {
   if (!FillCompleteStaticLib())
     return;
 
+  if (!FillDarwinBundle())
+    return;
+
   // Config values (compiler flags, etc.) set directly on this target.
   ConfigValuesGenerator gen(&target_->config_values(), scope_,
                             scope_->GetSourceDir(), err_);
@@ -131,3 +134,31 @@ bool BinaryTargetGenerator::FillAllowCircularIncludesFrom() {
     target_->allow_circular_includes_from().insert(cur);
   return true;
 }
+
+bool BinaryTargetGenerator::FillDarwinBundle() {
+  // This flag only applies to executable and shared_library target types.
+  if (target_->output_type() == Target::STATIC_LIBRARY)
+    return true;
+
+  const Value* value = scope_->GetValue(variables::kDarwinBundle, true);
+  if (value) {
+    if (!value->VerifyTypeIs(Value::BOOLEAN, err_))
+      return false;
+    target_->set_darwin_bundle(value->boolean_value());
+  }
+  return true;
+}
+
+bool BinaryTargetGenerator::FillLoadableModule() {
+  // This flag only applies to shared_library target types.
+  if (target_->output_type() != Target::SHARED_LIBRARY)
+    return true;
+
+  const Value* value = scope_->GetValue(variables::kLoadableModule, true);
+  if (value) {
+    if (!value->VerifyTypeIs(Value::BOOLEAN, err_))
+      return false;
+    target_->set_loadable_module(value->boolean_value());
+  }
+  return true;
+}