Question

我正在尝试将一些C文件链接到我正在处理的NDK项目，并像下面那样设置CMakeLists.txt文件。

cmake_minimum_required(VERSION 3.4.1)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c99 -Wall")


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


add_library( # Specifies the name of the library.
        main SHARED
        main.c
        communication_api.c
        cybtldr_api.c
        cybtldr_parse.c
        cybtldr_command.c
        )
target_link_libraries(main
        communication_api
        cybtldr_api
        cybtldr_parse
        cybtldr_command
        ${log-lib})

在链接这些库的步骤中出现错误

[6/6] Linking C shared library /Users/rafa/Code/Labconco-FreezeDry-Android-Refactor/app/build/intermediates/cmake/debug/obj/x86/libmain.so

错误很长

FAILED: : && /Users/rafa/Library/Android/sdk/ndk-bundle/toolchains/llvm/prebuilt/darwin-x86_64/bin/clang  --target=i686-none-linux-android19 --gcc-toolchain=/Users/rafa/Library/Android/sdk/ndk-bundle/toolchains/x86-4.9/prebuilt/darwin-x86_64 --sysroot=/Users/rafa/Library/Android/sdk/ndk-bundle/sysroot -fPIC -isystem /Users/rafa/Library/Android/sdk/ndk-bundle/sysroot/usr/include/i686-linux-android -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -mstackrealign -Wa,--noexecstack -Wformat -Werror=format-security  -std=c99 -Wall -O0 -fno-limit-debug-info  -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libatomic.a -nostdlib++ --sysroot /Users/rafa/Library/Android/sdk/ndk-bundle/platforms/android-19/arch-x86 -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -L/Users/rafa/Library/Android/sdk/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/x86 -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -shared -Wl,-soname,libmain.so -o /Users/rafa/Code/Labconco-FreezeDry-Android-Refactor/app/build/intermediates/cmake/debug/obj/x86/libmain.so CMakeFiles/main.dir/main.c.o CMakeFiles/main.dir/communication_api.c.o CMakeFiles/main.dir/cybtldr_api.c.o CMakeFiles/main.dir/cybtldr_parse.c.o CMakeFiles/main.dir/cybtldr_command.c.o  -lcommunication_api -lcybtldr_api -lcybtldr_parse -lcybtldr_command -llog -latomic -lm && :

/Users/rafa/Library/Android/sdk/ndk-bundle/toolchains/x86-4.9/prebuilt/darwin-x86_64/lib/gcc/i686-linux-android/4.9.x/../../../../i686-linux-android/bin/ld: error: cannot find - 
lcommunication_api
/Users/rafa/Library/Android/sdk/ndk-bundle/toolchains/x86-4.9/prebuilt/darwin-x86_64/lib/gcc/i686-linux-android/4.9.x/../../../../i686-linux-android/bin/ld: error: cannot find -lcybtldr_api
/Users/rafa/Library/Android/sdk/ndk-bundle/toolchains/x86-4.9/prebuilt/darwin-x86_64/lib/gcc/i686-linux-android/4.9.x/../../../../i686-linux-android/bin/ld: error: cannot find -lcybtldr_parse
/Users/rafa/Library/Android/sdk/ndk-bundle/toolchains/x86-4.9/prebuilt/darwin-x86_64/lib/gcc/i686-linux-android/4.9.x/../../../../i686-linux-android/bin/ld: error: cannot find -lcybtldr_command

要点是这个

error: cannot find -lcybtldr_command
error: cannot find -lcybtldr_api
error: cannot find -lcybtldr_parse
error: cannot find -lcybtldr_command

当它试图链接add_library()中除main之外的所有文件时似乎正在发生这种情况，const data = [{ name: 'testdata1', subdata: [{status: 'fail'}, { status: 'success' }] }, { name: 'testdata2', subdata: [{status: 'success'}, {status: 'fail'}] } ]; const filterData = (data, status) => data.reduce((acc, val) => { const sub = val.subdata.map((v) => v.status === status ? ({ name: val.name, subdata: [v] }) : null).filter(f => f !== null); return acc.concat(sub); }, []); const successData = filterData(data, 'success'); const failureData = filterData(data, 'fail'); console.log('successData', successData); console.log('failureData', failureData);与其他无法链接的文件位于同一目录中

我想念什么？

Answer 1

我认为您误解了cmake语法。以下足以满足您的要求。

target_link_libraries(
    main
    ${log-lib})

以下是源文件，不库名称。

communication_api
cybtldr_api
cybtldr_parse
cybtldr_command

因此，您的cmake语句不正确。

如果要减少混乱，请尝试进行以下更改。

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


add_library( # Specifies the name of the library.
        my-native-lib SHARED
        main.c
        communication_api.c
        cybtldr_api.c
        cybtldr_parse.c
        cybtldr_command.c
        )
target_link_libraries(my-native-lib
        ${log-lib})

但是，请记住也要更改Java方面，请参见以下示例：

// Used to load the 'my-native-lib' library on application startup.
static {
    System.loadLibrary("my-native-lib");
}

如果需要，我只附上我的JniExample项目：https://github.com/russell-shizhen/JniExample

链接共享的C库时，Android NDK错误

1 个答案: