Android NDK CMakeLists.txt：錯誤：未定義的參考：

我環顧四周，但我只能找到使用Android.mk和Application.mk的解決方案。我是否認爲通過使用CMakeLists.txt我不需要這些文件？這是我第一次嘗試使用Android NDK。Android NDK CMakeLists.txt：錯誤：未定義的參考：

我已將我的CMakeLists.txt關閉爲SuperpoweredExample，我已撥打我的圖書館nativelib。看起來，.cpp文件無法在頭文件中找到引用。難道我做錯了什麼？它構建得很好，但它只是在編譯時引發這些錯誤。

的CMakeLists.txt：

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 it for you. 
# Gradle automatically packages shared libraries with your APK. 

add_library(# Sets the name of the library. 
      nativelib 

      # Sets the library as a shared library. 
      SHARED 

      # Provides a relative path to your source file(s). 
      # Associated headers in the same location as their source 
      # file are automatically included. 
      G:/Git/NDKTest/app/src/main/jni/nativelib.cpp) 

# Searches for a specified prebuilt library and stores the path as a 
# variable. Because system libraries are included 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 the 
# build script, prebuilt third-party libraries, or system libraries. 

target_link_libraries(# Specifies the target library. 
         nativelib 

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

//////////////////////////////////////////////////////////////  
////////////////////////////////////////////////////////////// 
// Below here is copy and pasted from the SuperpoweredExample 
////////////////////////////////////////////////////////////// 
////////////////////////////////////////////////////////////// 

set(
    PATH_TO_SUPERPOWERED 
    "C:/Users/j/Downloads/Superpowered/Superpowered" 
) 

message(${ANDROID_ABI}) 

file(GLOB CPP_FILES "*.cpp") 

add_library(
    SuperpoweredExample 
    SHARED 
    ${CPP_FILES} 
    ${PATH_TO_SUPERPOWERED}/AndroidIO/SuperpoweredAndroidAudioIO.cpp 
) 

include_directories(src/main/jni) 
include_directories(${PATH_TO_SUPERPOWERED}) 

target_link_libraries(
    SuperpoweredExample 
    log 
    android 
    OpenSLES 
    ${PATH_TO_SUPERPOWERED}/libSuperpoweredAndroid${ANDROID_ABI}.a 
    nativelib 
)

堆棧跟蹤：從nativelib

Error:FAILURE: Build failed with an exception. 

* What went wrong: 
Execution failed for task ':app:externalNativeBuildDebug'. 
> Build command failed. 
Error while executing 'G:\sdk1\cmake\3.6.3155560\bin\cmake.exe' with arguments {--build G:\Git\NDKTest\app\.externalNativeBuild\cmake\debug\x86 --target nativelib} 
[1/2] Building CXX object CMakeFiles/nativelib.dir/nativelib.cpp.o 
[2/2] Linking CXX shared library G:\Git\NDKTest\app\build\intermediates\cmake\debug\obj\x86\libnativelib.so 
FAILED: cmd.exe /C "cd . && G:\sdk1\ndk-bundle\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++.exe -target i686-none-linux-android -gcc-toolchain G:/sdk1/ndk-bundle/toolchains/x86-4.9/prebuilt/windows-x86_64 --sysroot=G:/sdk1/ndk-bundle/platforms/android-16/arch-x86 -fPIC -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -Wa,--noexecstack -Wformat -Werror=format-security -fno-exceptions -fno-rtti -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -Wa,--noexecstack -Wformat -Werror=format-security -fno-exceptions -fno-rtti -fsigned-char -Inull -O0 -fno-limit-debug-info -O0 -fno-limit-debug-info -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -shared -Wl,-soname,libnativelib.so -o G:\Git\NDKTest\app\build\intermediates\cmake\debug\obj\x86\libnativelib.so CMakeFiles/nativelib.dir/nativelib.cpp.o -llog -lm "G:/sdk1/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/libs/x86/libgnustl_static.a" && cd ." 
G:\Git\NDKTest\app\src\main\jni/nativelib.cpp:16: error: undefined reference to 'SuperpoweredRoll::SuperpoweredRoll(unsigned int)' 
    G:\Git\NDKTest\app\src\main\jni/nativelib.cpp:17: error: undefined reference to 'SuperpoweredFilter::SuperpoweredFilter(SuperpoweredFilterType, unsigned int)' 
    G:\Git\NDKTest\app\src\main\jni/nativelib.cpp:18: error: undefined reference to 'SuperpoweredFlanger::SuperpoweredFlanger(unsigned int)' 
    G:\Git\NDKTest\app\src\main\jni/nativelib.cpp:19: error: undefined reference to 'SuperpoweredRecorder::SuperpoweredRecorder(char const*, unsigned int, unsigned int)' 
    G:\Git\NDKTest\app\src\main\jni/nativelib.cpp:21: error: undefined reference to 'SuperpoweredAndroidAudioIO::SuperpoweredAndroidAudioIO(int, int, bool, bool, bool (*)(void*, short*, int, int), void*, int, int, int)' 
    G:\Git\NDKTest\app\src\main\jni/nativelib.cpp:28: error: undefined reference to 'SuperpoweredRecorder::stop()' 
    G:\Git\NDKTest\app\src\main\jni/nativelib.cpp:30: error: undefined reference to 'SuperpoweredRecorder::start(char const*)' 
    G:\Git\NDKTest\app\src\main\jni/nativelib.cpp:37: error: undefined reference to 'SuperpoweredRecorder::process(float*, float*, unsigned int)' 
    G:\Git\NDKTest\app\src\main\jni/nativelib.cpp:38: error: undefined reference to 'SuperpoweredFloatToShortInt(float*, short*, unsigned int, unsigned int)' 
    G:\Git\NDKTest\app\src\main\jni/nativelib.cpp:43: error: undefined reference to 'SuperpoweredAndroidAudioIO::~SuperpoweredAndroidAudioIO()' 
    G:\Git\NDKTest\app\src\main\jni/nativelib.cpp:44: error: undefined reference to 'SuperpoweredRecorder::~SuperpoweredRecorder()' 
    clang++.exe: error: linker command failed with exit code 1 (use -v to see invocation) 
    ninja: build stopped: subcommand failed. 


* Try: 
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

改名爲nativelib，同樣的錯誤。

我有一種感覺，錯誤是在target_link_libraries()的CMakeLists.txt。我正在嘗試將我的NativeLib代碼與現有的SuperpoweredExample代碼鏈接起來。

來源

2016-11-10 Josh Laird

這是一個編譯器錯誤。你確定提供所有包含嗎？手動輸入編譯命令是否編譯？那麼你可能想把你的命令與CMake的命令進行比較（使用VERBOSE = ON） – usr1234567

我認爲鏈接你的「nativelib」發生在鏈接Superpowered示例之前，因此你的鏈接器無法找到「nativelib」使用的超級動力部分。

來源

2016-12-02 17:35:37

那麼解決方案是什麼？ – Khan

將「nativelib」與Superpowered鏈接起來，就像在第二次鏈接中一樣。 –

Android NDK CMakeLists.txt：錯誤：未定義的參考：

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