linux: fix library=shared_library issues

third_party/protobuf2/protobuf.gyp

 # Copyright (c) 2009 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'conditions': [
     ['OS!="win"', {
       'variables': {
         'config_h_dir':
           '.',  # crafted for gcc/linux.
@@ skipping 115 matching lines @@
         'src/src/google/protobuf/descriptor_database.cc',
         'src/src/google/protobuf/dynamic_message.cc',
         'src/src/google/protobuf/extension_set_heavy.cc',
         'src/src/google/protobuf/generated_message_reflection.cc',
         'src/src/google/protobuf/message.cc',
         'src/src/google/protobuf/reflection_ops.cc',
         'src/src/google/protobuf/service.cc',
         'src/src/google/protobuf/text_format.cc',
         'src/src/google/protobuf/unknown_field_set.cc',
         'src/src/google/protobuf/wire_format.cc',
-        'src/src/google/protobuf/io/gzip_stream.cc',
+        # This file pulls in zlib, but it's not actually used by protoc, so
+        # instead of compiling zlib for the host, let's just exclude this.
+        # 'src/src/google/protobuf/io/gzip_stream.cc',
         'src/src/google/protobuf/io/printer.cc',
         'src/src/google/protobuf/io/tokenizer.cc',
         'src/src/google/protobuf/io/zero_copy_stream_impl.cc',
-        'src/src/google/protobuf/io/zero_copy_stream_impl_lite.cc',
         'src/src/google/protobuf/compiler/importer.cc',
         'src/src/google/protobuf/compiler/parser.cc',
       ],
       'dependencies': [
         'protobuf_lite',
       ],
       'export_dependent_settings': [
         'protobuf_lite',
       ],
     },
@@ skipping 62 matching lines @@
       ],
     },
   ],
  }
 
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