android - 如何在 CMakeLists.txt 中添加新的源文件？

Question

我正在创建一个通过 android NDK 读写文件的演示。我正在使用 CMake，我的项目中有 CMakeLists.txt，内容如下:

    # For more information about using CMake with Android Studio, read the
    # documentation: https://d.android.com/studio/projects/add-native-code.html

    # Sets the minimum version of CMake required to build the native library.

    cmake_minimum_required(VERSION 3.4.1)

    # Creates and names a library, sets it as either STATIC
    # or SHARED, and provides the relative paths to its source code.
    # You can define multiple libraries, and CMake builds them for you.
    # Gradle automatically packages shared libraries with your APK.

    add_library( # Sets the name of the library.
            native-lib

            # Sets the library as a shared library.
            SHARED

            # Provides a relative path to your source file(s).
            src/main/cpp/native-lib.cpp)

    # Searches for a specified prebuilt library and stores the path as a
    # variable. Because CMake includes system libraries in the search path by
    # default, you only need to specify the name of the public NDK library
    # you want to add. CMake verifies that the library exists before
    # completing its build.

    find_library( # Sets the name of the path variable.
            log-lib

            # Specifies the name of the NDK library that
            # you want CMake to locate.
            log)

    # Specifies libraries CMake should link to your target library. You
    # can link multiple libraries, such as libraries you define in this
    # build script, prebuilt third-party libraries, or system libraries.

    target_link_libraries( # Specifies the target library.
            native-lib

            # Links the target library to the log library
            # included in the NDK.
            ${log-lib})

我在保存 native-lib.cpp 的同一文件夹中创建了一个新的 utility.cpp 和 utility.h 文件。我能够在 native-lib.cpp 中包含 utility.h。当我运行该程序时出现错误 undefined reference to function {fun} 其中 {fun} 是一个用 utility.cpp 编写的函数。

请建议我如何在我的项目中构建这两个源文件。

Answer 1

只需将 cpp 添加到您的 CMakeLists

add_library( # Sets the name of the library.
        native-lib

        # Sets the library as a shared library.
        SHARED

        # Provides a relative path to your source file(s).
        src/main/cpp/native-lib.cpp
        src/main/cpp/utility.cpp
)