3 files changed, 53 insertions, 9 deletions

diff --git a/js/gulpfile.js b/js/gulpfile.js
index c5220153..cca99131 100644
--- a/js/gulpfile.js
+++ b/js/gulpfile.js
@@ -8,6 +8,21 @@ function exec(command, cb) {
 
 var protoc = process.env.PROTOC || '../src/protoc';
 
+var wellKnownTypes = [
+  '../src/google/protobuf/any.proto',
+  '../src/google/protobuf/api.proto',
+  '../src/google/protobuf/compiler/plugin.proto',
+  '../src/google/protobuf/descriptor.proto',
+  '../src/google/protobuf/duration.proto',
+  '../src/google/protobuf/empty.proto',
+  '../src/google/protobuf/field_mask.proto',
+  '../src/google/protobuf/source_context.proto',
+  '../src/google/protobuf/struct.proto',
+  '../src/google/protobuf/timestamp.proto',
+  '../src/google/protobuf/type.proto',
+  '../src/google/protobuf/wrappers.proto',
+];
+
 gulp.task('genproto_closure', function (cb) {
   exec(protoc + ' --js_out=library=testproto_libs,binary:.  -I ../src -I . *.proto ../src/google/protobuf/descriptor.proto',
        function (err, stdout, stderr) {
@@ -26,7 +41,25 @@ gulp.task('genproto_commonjs', function (cb) {
   });
 });
 
-gulp.task('dist', function (cb) {
+gulp.task('genproto_commonjs_wellknowntypes', function (cb) {
+  exec('mkdir -p commonjs_out/node_modules/google-protobuf && ' + protoc + ' --js_out=import_style=commonjs,binary:commonjs_out/node_modules/google-protobuf -I ../src ../src/google/protobuf/descriptor.proto',
+       function (err, stdout, stderr) {
+    console.log(stdout);
+    console.log(stderr);
+    cb(err);
+  });
+});
+
+gulp.task('genproto_wellknowntypes', function (cb) {
+  exec(protoc + ' --js_out=import_style=commonjs,binary:. -I ../src ' + wellKnownTypes.join(' '),
+       function (err, stdout, stderr) {
+    console.log(stdout);
+    console.log(stderr);
+    cb(err);
+  });
+});
+
+gulp.task('dist', ['genproto_wellknowntypes'], function (cb) {
   // TODO(haberman): minify this more aggressively.
   // Will require proper externs/exports.
   exec('./node_modules/google-closure-library/closure/bin/calcdeps.py -i message.js -i binary/reader.js -i binary/writer.js -i commonjs/export.js -p . -p node_modules/google-closure-library/closure -o compiled --compiler_jar node_modules/google-closure-compiler/compiler.jar > google-protobuf.js',
@@ -55,7 +88,7 @@ gulp.task('commonjs_testdeps', function (cb) {
   });
 });
 
-gulp.task('make_commonjs_out', ['dist', 'genproto_commonjs', 'commonjs_asserts', 'commonjs_testdeps'], function (cb) {
+gulp.task('make_commonjs_out', ['dist', 'genproto_commonjs', 'genproto_commonjs_wellknowntypes', 'commonjs_asserts', 'commonjs_testdeps'], function (cb) {
   // TODO(haberman): minify this more aggressively.
   // Will require proper externs/exports.
   var cmd = "mkdir -p commonjs_out/binary && mkdir -p commonjs_out/test_node_modules && ";
diff --git a/src/google/protobuf/compiler/js/js_generator.cc b/src/google/protobuf/compiler/js/js_generator.cc
index 3de61e80..17d50987 100755
--- a/src/google/protobuf/compiler/js/js_generator.cc
+++ b/src/google/protobuf/compiler/js/js_generator.cc
@@ -159,8 +159,16 @@ string GetJSFilename(const string& filename) {
 
 // Given a filename like foo/bar/baz.proto, returns the root directory
 // path ../../
-string GetRootPath(const string& filename) {
-  size_t slashes = std::count(filename.begin(), filename.end(), '/');
+string GetRootPath(const string& from_filename, const string& to_filename) {
+  if (to_filename.find("google/protobuf") == 0) {
+    // Well-known types (.proto files in the google/protobuf directory) are
+    // assumed to come from the 'google-protobuf' npm package.  We may want to
+    // generalize this exception later by letting others put generated code in
+    // their own npm packages.
+    return "google-protobuf/";
+  }
+
+  size_t slashes = std::count(from_filename.begin(), from_filename.end(), '/');
   if (slashes == 0) {
     return "./";
   }
@@ -2837,7 +2845,7 @@ void Generator::GenerateFile(const GeneratorOptions& options,
       printer->Print(
           "var $alias$ = require('$file$');\n",
           "alias", ModuleAlias(name),
-          "file", GetRootPath(file->name()) + GetJSFilename(name));
+          "file", GetRootPath(file->name(), name) + GetJSFilename(name));
     }
   }
 
diff --git a/src/google/protobuf/map.h b/src/google/protobuf/map.h
index 6f1a71e4..31593c1a 100644
--- a/src/google/protobuf/map.h
+++ b/src/google/protobuf/map.h
@@ -587,7 +587,7 @@ class Map {
     explicit MapAllocator(Arena* arena) : arena_(arena) {}
     template <typename X>
     MapAllocator(const MapAllocator<X>& allocator)
-        : arena_(allocator.arena_) {}
+        : arena_(allocator.arena()) {}
 
     pointer allocate(size_type n, const_pointer hint = 0) {
       // If arena is not given, malloc needs to be called which doesn't
@@ -650,12 +650,15 @@ class Map {
       return std::numeric_limits<size_type>::max();
     }
 
+    // To support gcc-4.4, which does not properly
+    // support templated friend classes
+    Arena* arena() const {
+      return arena_;
+    }
+
    private:
     typedef void DestructorSkippable_;
     Arena* const arena_;
-
-    template <typename X>
-    friend class MapAllocator;
   };
 
   // InnerMap's key type is Key and its value type is value_type*.  We use a