无法使用 CMake 从不同文件夹添加源文件答案

【问题标题】：Cannot add source file from different folder using CMake无法使用 CMake 从不同文件夹添加源文件
【发布时间】：2023-03-25 18:07:01
【问题描述】：

当我尝试在 CMake 中添加 .cpp 和 .h 文件时出现错误。同一文件夹中的头文件正在工作。我在 Android Studio 3.0 上工作。错误是：

CMake Error at CMakeLists.txt:26 (add_library):
Cannot find source file:
libs/Superpowered/AndroidIO/SuperpoweredAndroidAudioIO.cpp
Tried extensions .c .C .c++ .cc .cpp .cxx .m .M .mm .h .hh .h++ .hm .hpp
.hxx .in .txx

CMake的路径是：

\app\src\main\jni\CMakeLists

.cpp 和 .h 文件的路径是：

libs/Superpowered/AndroidIO/SuperpoweredAndroidAudioIO

CMake 文件是：

cmake_minimum_required(VERSION 3.4.1)

set(
        PATH_TO_SUPERPOWERED "libs/Superpowered/AndroidIO/SuperpoweredAndroidAudioIO"
        CACHE STRING ""
)

message(${ANDROID_ABI})

file(GLOB CPP_FILES
        "*.h"
        "*.cpp")

add_executable(CPPFILES ${CPP_FILES})

add_library(
        libs
        SHARED
        libs/Superpowered/AndroidIO/SuperpoweredAndroidAudioIO.cpp
)

target_include_directories(libs PRIVATE
        libs/Superpowered/AndroidIO/SuperpoweredAndroidAudioIO
        )
include_directories(src/main/jni)

include_directories(${PATH_TO_SUPERPOWERED})

target_link_libraries(
        libs
        log
        android
        OpenSLES
        ${PATH_TO_SUPERPOWERED}/libSuperpoweredAndroid.a
)

知道如何解决这个问题吗？

【问题讨论】：

您说：“.cpp 和 h 的路径是 libs/Superpowered/AndroidIO/SuperpoweredAndroidAudioIO”所以您应该将 libs/Superpowered/AndroidIO/SuperpoweredAndroidAudioIO/SuperpoweredAndroidAudioIO.cpp 添加到您的添加库调用中。

标签： android c++ cmake android-studio-3.0

【解决方案1】：

如评论所述，您用于引用库源文件的路径似乎不正确。你提到的图书馆来源在这里：

libs/Superpowered/AndroidIO/SuperpoweredAndroidAudioIO

所以，库源文件SuperpoweredAndroidAudioIO.cpp的完整路径应该是：

libs/Superpowered/AndroidIO/SuperpoweredAndroidAudioIO/SuperpoweredAndroidAudioIO.cpp

更好的是，使用您已经在 CMake 变量 PATH_TO_SUPERPOWERED 中定义的路径来引用源文件。如果确实是相同的路径，请节省一些输入，并尽可能使用变量引用它：

cmake_minimum_required(VERSION 3.4.1)

set(
        PATH_TO_SUPERPOWERED "libs/Superpowered/AndroidIO/SuperpoweredAndroidAudioIO"
        CACHE STRING ""
)

message(${ANDROID_ABI})

file(GLOB CPP_FILES
        "*.h"
        "*.cpp")

add_executable(CPPFILES ${CPP_FILES})

# Reference the source file using the path defined in your CMake variable.
add_library(
        libs
        SHARED
        ${PATH_TO_SUPERPOWERED}/SuperpoweredAndroidAudioIO.cpp
)

# You can remove this call because it is redundant with 
# the 'include_directories' call below.
target_include_directories(libs PRIVATE
        libs/Superpowered/AndroidIO/SuperpoweredAndroidAudioIO
        )

# You can merge the two 'include_directories' calls into one.
include_directories(
    src/main/jni 
    ${PATH_TO_SUPERPOWERED}
)

target_link_libraries(
        libs
        log
        android
        OpenSLES
        ${PATH_TO_SUPERPOWERED}/libSuperpoweredAndroid.a
)

【讨论】：