Build the protocol buffer compiler 'protoc'.

We need this to generate code for .proto files that have
been added to external/chromium (see change I6960c18d).

Change-Id: Ic7a78273ee4f066680039d2f724e658a84869621

Android.mk

@@ -47,6 +47,79 @@ JAVA_LITE_SRC_FILES := \
     java/src/main/java/com/google/protobuf/WireFormat.java \
     java/src/main/java/com/google/protobuf/GeneratedMessageLite.java
 
+COMPILER_SRC_FILES :=  \
+    src/google/protobuf/descriptor.cc \
+    src/google/protobuf/descriptor.pb.cc \
+    src/google/protobuf/descriptor_database.cc \
+    src/google/protobuf/dynamic_message.cc \
+    src/google/protobuf/extension_set.cc \
+    src/google/protobuf/extension_set_heavy.cc \
+    src/google/protobuf/generated_message_reflection.cc \
+    src/google/protobuf/generated_message_util.cc \
+    src/google/protobuf/message.cc \
+    src/google/protobuf/message_lite.cc \
+    src/google/protobuf/reflection_ops.cc \
+    src/google/protobuf/repeated_field.cc \
+    src/google/protobuf/service.cc \
+    src/google/protobuf/text_format.cc \
+    src/google/protobuf/unknown_field_set.cc \
+    src/google/protobuf/wire_format.cc \
+    src/google/protobuf/wire_format_lite.cc \
+    src/google/protobuf/compiler/code_generator.cc \
+    src/google/protobuf/compiler/command_line_interface.cc \
+    src/google/protobuf/compiler/importer.cc \
+    src/google/protobuf/compiler/main.cc \
+    src/google/protobuf/compiler/parser.cc \
+    src/google/protobuf/compiler/plugin.cc \
+    src/google/protobuf/compiler/plugin.pb.cc \
+    src/google/protobuf/compiler/subprocess.cc \
+    src/google/protobuf/compiler/zip_writer.cc \
+    src/google/protobuf/compiler/cpp/cpp_enum.cc \
+    src/google/protobuf/compiler/cpp/cpp_enum_field.cc \
+    src/google/protobuf/compiler/cpp/cpp_extension.cc \
+    src/google/protobuf/compiler/cpp/cpp_field.cc \
+    src/google/protobuf/compiler/cpp/cpp_file.cc \
+    src/google/protobuf/compiler/cpp/cpp_generator.cc \
+    src/google/protobuf/compiler/cpp/cpp_helpers.cc \
+    src/google/protobuf/compiler/cpp/cpp_message.cc \
+    src/google/protobuf/compiler/cpp/cpp_message_field.cc \
+    src/google/protobuf/compiler/cpp/cpp_primitive_field.cc \
+    src/google/protobuf/compiler/cpp/cpp_service.cc \
+    src/google/protobuf/compiler/cpp/cpp_string_field.cc \
+    src/google/protobuf/compiler/java/java_enum.cc \
+    src/google/protobuf/compiler/java/java_enum_field.cc \
+    src/google/protobuf/compiler/java/java_extension.cc \
+    src/google/protobuf/compiler/java/java_field.cc \
+    src/google/protobuf/compiler/java/java_file.cc \
+    src/google/protobuf/compiler/java/java_generator.cc \
+    src/google/protobuf/compiler/java/java_helpers.cc \
+    src/google/protobuf/compiler/java/java_message.cc \
+    src/google/protobuf/compiler/java/java_message_field.cc \
+    src/google/protobuf/compiler/java/java_primitive_field.cc \
+    src/google/protobuf/compiler/java/java_service.cc \
+    src/google/protobuf/compiler/javamicro/javamicro_enum.cc \
+    src/google/protobuf/compiler/javamicro/javamicro_enum_field.cc \
+    src/google/protobuf/compiler/javamicro/javamicro_field.cc \
+    src/google/protobuf/compiler/javamicro/javamicro_file.cc \
+    src/google/protobuf/compiler/javamicro/javamicro_generator.cc \
+    src/google/protobuf/compiler/javamicro/javamicro_helpers.cc \
+    src/google/protobuf/compiler/javamicro/javamicro_message.cc \
+    src/google/protobuf/compiler/javamicro/javamicro_message_field.cc \
+    src/google/protobuf/compiler/javamicro/javamicro_primitive_field.cc \
+    src/google/protobuf/compiler/python/python_generator.cc \
+    src/google/protobuf/io/coded_stream.cc \
+    src/google/protobuf/io/gzip_stream.cc \
+    src/google/protobuf/io/printer.cc \
+    src/google/protobuf/io/tokenizer.cc \
+    src/google/protobuf/io/zero_copy_stream.cc \
+    src/google/protobuf/io/zero_copy_stream_impl.cc \
+    src/google/protobuf/io/zero_copy_stream_impl_lite.cc \
+    src/google/protobuf/stubs/common.cc \
+    src/google/protobuf/stubs/hash.cc \
+    src/google/protobuf/stubs/once.cc \
+    src/google/protobuf/stubs/structurally_valid.cc \
+    src/google/protobuf/stubs/strutil.cc \
+    src/google/protobuf/stubs/substitute.cc
 
 # Java micro library (for device-side users)
 # =======================================================
@@ -198,3 +271,24 @@ endif
 LOCAL_CFLAGS := -DGOOGLE_PROTOBUF_NO_RTTI
 
 include $(BUILD_STATIC_LIBRARY)
+
+# Protocol buffer compiler (host executable)
+# =======================================================
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := protoc
+LOCAL_MODULE_CLASS := EXECUTABLES
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_CPP_EXTENSION := .cc
+LOCAL_SRC_FILES := $(COMPILER_SRC_FILES)
+
+LOCAL_C_INCLUDES := \
+    $(LOCAL_PATH)/android \
+    $(LOCAL_PATH)/src
+
+LOCAL_STATIC_LIBRARIES += libz
+LOCAL_LDLIBS := -lpthread
+
+include $(BUILD_HOST_EXECUTABLE)
+