ndk-build No rule to make target for protobuf

Question

我一直在尝试使用ndk-build来获取我的用于Android开发的protobuf库，但我总是遇到一些问题。我从另一个堆栈溢出线程获得了我的Android.mk文件，它似乎不能工作。我是.mk的新手，完全不知道自己在做什么。

我在这个问题上也找到了这个：Android NDK: No rule to make target

在那个帖子中，他们指出有一行代码末尾的空格太多，所以我梳理了自己的文件，但找不到问题的根源。我明白了：

make: *** No rule to make target `C:/Users/jkarr/Downloads/protobuf-
master/jni/google/protobuf/arena.cc', needed by 
`C:/Users/jkarr/Downloads/protobuf-master/obj/local/armeabi-
v7a/objs/protobuf/google/protobuf/arena.o'.  Stop.

这是我的Android.mk文件：

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
c_includes := $(LOCAL_PATH)
LOCAL_MODULE := libprotobuf

LOCAL_SRC_FILES := \
google/protobuf/arena.cc \
google/protobuf/arenastring.cc \
google/protobuf/extension_set.cc \
google/protobuf/generated_message_util.cc \
google/protobuf/io/coded_stream.cc \
google/protobuf/io/zero_copy_stream.cc \
google/protobuf/io/zero_copy_stream_impl_lite.cc \
google/protobuf/message_lite.cc \
google/protobuf/repeated_field.cc \
google/protobuf/stubs/atomicops_internals_x86_gcc.cc \
google/protobuf/stubs/atomicops_internals_x86_msvc.cc \
google/protobuf/stubs/bytestream.cc \
google/protobuf/stubs/common.cc \
google/protobuf/stubs/int128.cc \
google/protobuf/stubs/once.cc \
google/protobuf/stubs/status.cc \
google/protobuf/stubs/statusor.cc \
google/protobuf/stubs/stringpiece.cc \
google/protobuf/stubs/stringprintf.cc \
google/protobuf/stubs/structurally_valid.cc \
google/protobuf/stubs/strutil.cc \
google/protobuf/stubs/time.cc \
google/protobuf/wire_format_lite.cc \
google/protobuf/any.cc \
google/protobuf/any.pb.cc \
google/protobuf/api.pb.cc \
google/protobuf/compiler/importer.cc \
google/protobuf/compiler/parser.cc \
google/protobuf/descriptor.cc \
google/protobuf/descriptor.pb.cc \
google/protobuf/descriptor_database.cc \
google/protobuf/duration.pb.cc \
google/protobuf/dynamic_message.cc \
google/protobuf/empty.pb.cc \
google/protobuf/extension_set_heavy.cc \
google/protobuf/field_mask.pb.cc \
google/protobuf/generated_message_reflection.cc \
google/protobuf/io/gzip_stream.cc \
google/protobuf/io/printer.cc \
google/protobuf/io/strtod.cc \
google/protobuf/io/tokenizer.cc \
google/protobuf/io/zero_copy_stream_impl.cc \
google/protobuf/map_field.cc \
google/protobuf/message.cc \
google/protobuf/reflection_ops.cc \
google/protobuf/service.cc \
google/protobuf/source_context.pb.cc \
google/protobuf/struct.pb.cc \
google/protobuf/stubs/mathlimits.cc \
google/protobuf/stubs/substitute.cc \
google/protobuf/text_format.cc \
google/protobuf/timestamp.pb.cc \
google/protobuf/type.pb.cc \
google/protobuf/unknown_field_set.cc \
google/protobuf/util/field_comparator.cc \
google/protobuf/util/field_mask_util.cc \
google/protobuf/util/internal/datapiece.cc \
google/protobuf/util/internal/default_value_objectwriter.cc \
google/protobuf/util/internal/error_listener.cc \
google/protobuf/util/internal/field_mask_utility.cc \
google/protobuf/util/internal/json_escaping.cc \
google/protobuf/util/internal/json_objectwriter.cc \
google/protobuf/util/internal/json_stream_parser.cc \
google/protobuf/util/internal/object_writer.cc \
google/protobuf/util/internal/proto_writer.cc \
google/protobuf/util/internal/protostream_objectsource.cc \
google/protobuf/util/internal/protostream_objectwriter.cc \
google/protobuf/util/internal/type_info.cc \
google/protobuf/util/internal/type_info_test_helper.cc \
google/protobuf/util/internal/utility.cc \
google/protobuf/util/json_util.cc \
google/protobuf/util/message_differencer.cc \
google/protobuf/util/time_util.cc \
google/protobuf/util/type_resolver_util.cc \
google/protobuf/wire_format.cc \
google/protobuf/wrappers.pb.cc \
google/protobuf/compiler/code_generator.cc \
google/protobuf/compiler/command_line_interface.cc \
google/protobuf/compiler/cpp/cpp_enum.cc \
google/protobuf/compiler/cpp/cpp_enum_field.cc \
google/protobuf/compiler/cpp/cpp_extension.cc \
google/protobuf/compiler/cpp/cpp_field.cc \
google/protobuf/compiler/cpp/cpp_file.cc \
google/protobuf/compiler/cpp/cpp_generator.cc \
google/protobuf/compiler/cpp/cpp_helpers.cc \
google/protobuf/compiler/cpp/cpp_map_field.cc \
google/protobuf/compiler/cpp/cpp_message.cc \
google/protobuf/compiler/cpp/cpp_message_field.cc \
google/protobuf/compiler/cpp/cpp_primitive_field.cc \
google/protobuf/compiler/cpp/cpp_service.cc \
google/protobuf/compiler/cpp/cpp_string_field.cc \
google/protobuf/compiler/plugin.cc \
google/protobuf/compiler/plugin.pb.cc \
google/protobuf/compiler/python/python_generator.cc \
google/protobuf/compiler/ruby/ruby_generator.cc \
google/protobuf/compiler/subprocess.cc \
google/protobuf/compiler/zip_writer.cc \


LOCAL_CFLAGS := -D GOOGLE_PROTOBUF_NO_RTTI=1
LOCAL_CPPFLAGS := -std=c++11
LOCAL_C_INCLUDES = $(LOCAL_PATH)/android
LOCAL_C_INCLUDES += ${ANDROID_NDK}/sources/cxx-stl/gnu-        libstdc++/4.8/include
LOCAL_LDLIBS += -lz
LOCAL_EXPORT_LDLIBS += -lz
LOCAL_EXPORT_CFLAGS := $(LOCAL_CFLAGS)
LOCAL_EXPORT_CPPFLAGS := $(LOCAL_CPPFLAGS)
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_C_INCLUDES)


include $(BUILD_SHARED_LIBRARY)

不确定您是否也需要我的应用程序文件，但不管怎样，它在这里：

APP_STL :=gnustl_shared # gnustl_static
NDK_TOOLCHAIN_VERSION := 4.9
APP_ABI := armeabi-v7a
LIBCXX_FORCE_REBUILD := true
APP_PLATFORM:=android-19
NDK_DEBUG:=1

编辑:作为一个次要问题，我这里的Android.mk能让我使用protobuf-lite吗？

Answer 1

我弄明白了为什么它会给我这个错误。我找错文件夹了。修复后的代码如下：

LOCAL_PATH := $(call my-dir)\src

现在我有了一个完全不同的问题。我收到错误消息：

[armeabi-v7a] Compile++ thumb: protobuf <= common.cc
C:/Users/jkarr/Downloads/protobuf-
3.5.0/jni\src/google/protobuf/stubs/common.cc:52:2: error: #error "No 
suitable threading library available."
#error "No suitable threading library available."
^
make: *** [C:/Users/jkarr/Downloads/protobuf-3.5.0/obj/local/armeabi-
v7a/objs/protobuf/google/protobuf/stubs/common.o] Error 1

我不知道从哪里开始做这个。

Answer 2

假设你正在关注这篇文章https://stackoverflow.com/a/43729661/3845809，有几件事会导致问题。主要的问题是，这篇文章描述了如何构建v3.2，而您正在尝试构建v3.5。如果您可以使用v3.2，那么修复此问题的最简单方法是在post中的步骤2之前检查protobuf中的3.2.x分支。

为了构建用于NDK的v3.5，您需要在Android.mk文件中进行一些更新。以下是更新后的Android.mk

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
c_includes := $(LOCAL_PATH)
LOCAL_MODULE := libprotobuf

LOCAL_SRC_FILES := \
google/protobuf/arena.cc \
google/protobuf/arenastring.cc \
google/protobuf/extension_set.cc \
google/protobuf/generated_message_util.cc \
google/protobuf/io/coded_stream.cc \
google/protobuf/io/zero_copy_stream.cc \
google/protobuf/io/zero_copy_stream_impl_lite.cc \
google/protobuf/message_lite.cc \
google/protobuf/repeated_field.cc \
google/protobuf/stubs/atomicops_internals_x86_gcc.cc \
google/protobuf/stubs/atomicops_internals_x86_msvc.cc \
google/protobuf/stubs/bytestream.cc \
google/protobuf/stubs/common.cc \
google/protobuf/stubs/int128.cc \
google/protobuf/stubs/once.cc \
google/protobuf/stubs/status.cc \
google/protobuf/stubs/statusor.cc \
google/protobuf/stubs/stringpiece.cc \
google/protobuf/stubs/stringprintf.cc \
google/protobuf/stubs/structurally_valid.cc \
google/protobuf/stubs/strutil.cc \
google/protobuf/stubs/time.cc \
google/protobuf/wire_format_lite.cc \
google/protobuf/any.cc \
google/protobuf/any.pb.cc \
google/protobuf/api.pb.cc \
google/protobuf/compiler/importer.cc \
google/protobuf/compiler/parser.cc \
google/protobuf/descriptor.cc \
google/protobuf/descriptor.pb.cc \
google/protobuf/descriptor_database.cc \
google/protobuf/duration.pb.cc \
google/protobuf/dynamic_message.cc \
google/protobuf/empty.pb.cc \
google/protobuf/extension_set_heavy.cc \
google/protobuf/field_mask.pb.cc \
google/protobuf/generated_message_reflection.cc \
google/protobuf/io/gzip_stream.cc \
google/protobuf/io/printer.cc \
google/protobuf/io/strtod.cc \
google/protobuf/io/tokenizer.cc \
google/protobuf/io/zero_copy_stream_impl.cc \
google/protobuf/map_field.cc \
google/protobuf/message.cc \
google/protobuf/reflection_ops.cc \
google/protobuf/service.cc \
google/protobuf/source_context.pb.cc \
google/protobuf/struct.pb.cc \
google/protobuf/stubs/mathlimits.cc \
google/protobuf/stubs/substitute.cc \
google/protobuf/text_format.cc \
google/protobuf/timestamp.pb.cc \
google/protobuf/type.pb.cc \
google/protobuf/unknown_field_set.cc \
google/protobuf/util/field_comparator.cc \
google/protobuf/util/field_mask_util.cc \
google/protobuf/util/internal/datapiece.cc \
google/protobuf/util/internal/default_value_objectwriter.cc \
google/protobuf/util/internal/error_listener.cc \
google/protobuf/util/internal/field_mask_utility.cc \
google/protobuf/util/internal/json_escaping.cc \
google/protobuf/util/internal/json_objectwriter.cc \
google/protobuf/util/internal/json_stream_parser.cc \
google/protobuf/util/internal/object_writer.cc \
google/protobuf/util/internal/proto_writer.cc \
google/protobuf/util/internal/protostream_objectsource.cc \
google/protobuf/util/internal/protostream_objectwriter.cc \
google/protobuf/util/internal/type_info.cc \
google/protobuf/util/internal/type_info_test_helper.cc \
google/protobuf/util/internal/utility.cc \
google/protobuf/util/json_util.cc \
google/protobuf/util/message_differencer.cc \
google/protobuf/util/time_util.cc \
google/protobuf/util/type_resolver_util.cc \
google/protobuf/wire_format.cc \
google/protobuf/wrappers.pb.cc \
google/protobuf/compiler/code_generator.cc      \
google/protobuf/compiler/command_line_interface.cc      \
google/protobuf/compiler/cpp/cpp_enum.cc      \
google/protobuf/compiler/cpp/cpp_enum_field.cc      \
google/protobuf/compiler/cpp/cpp_extension.cc      \
google/protobuf/compiler/cpp/cpp_field.cc      \
google/protobuf/compiler/cpp/cpp_file.cc      \
google/protobuf/compiler/cpp/cpp_generator.cc      \
google/protobuf/compiler/cpp/cpp_helpers.cc      \
google/protobuf/compiler/cpp/cpp_map_field.cc      \
google/protobuf/compiler/cpp/cpp_padding_optimizer.cc      \
google/protobuf/compiler/cpp/cpp_message.cc      \
google/protobuf/compiler/cpp/cpp_message_field.cc      \
google/protobuf/compiler/cpp/cpp_primitive_field.cc      \
google/protobuf/compiler/cpp/cpp_service.cc      \
google/protobuf/compiler/cpp/cpp_string_field.cc      \
google/protobuf/compiler/plugin.cc      \
google/protobuf/compiler/plugin.pb.cc      \
google/protobuf/compiler/python/python_generator.cc      \
google/protobuf/compiler/ruby/ruby_generator.cc      \
google/protobuf/compiler/subprocess.cc      \
google/protobuf/compiler/zip_writer.cc      \


LOCAL_CFLAGS := -D GOOGLE_PROTOBUF_NO_RTTI=1
LOCAL_CPPFLAGS := -std=c++11 -D HAVE_PTHREAD=1 -frtti
LOCAL_C_INCLUDES = $(LOCAL_PATH)/android
LOCAL_C_INCLUDES += ${ANDROID_NDK}/sources/cxx-stl/gnu-        libstdc++/4.8/include
LOCAL_LDLIBS += -lz -llog
LOCAL_EXPORT_LDLIBS += -lz
LOCAL_EXPORT_CFLAGS := $(LOCAL_CFLAGS)
LOCAL_EXPORT_CPPFLAGS := $(LOCAL_CPPFLAGS)
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_C_INCLUDES)


include $(BUILD_SHARED_LIBRARY)