使用CMake将静态库(.a文件)添加到Android项目中，获取"CMake错误:CMake无法确定目标的链接器语言". [英] Add a static library (.a file) to an Android project with CMake, get "CMake Error: CMake can not determine linker language for target"

问题描述

我从另一个Android项目生成了静态库，因此非常确定它们是可用的.

I generate the static library from another Android project, so pretty sure they're useable.

我得到了四个基于CPU架构的.a文件，其中一个.h文件也已经过测试.

I got four .a files based on CPU architectures, one .h file which also has been tested.

现在在新项目中，另一个.c文件要调用静态库，我无法将两个项目合并，必须以.a格式调用静态库.

Now in new project, another .c file want to call the static library, i can't combine the two projects, the static libraries must be called in .a format.

我收到"CMake错误:CMake无法确定目标的链接器语言"，这是我的CMakeLists.txt:

I got "CMake Error: CMake can not determine linker language for target", this is my CMakeLists.txt:

add_library(
    mylib
    STATIC
    src/main/jniLibs/arm64-v8a/libmylib.a
    src/main/jniLibs/armeabi-v7a/libmylib.a
    src/main/jniLibs/x86/libmylib.a
    src/main/jniLibs/x86_64/libmylib.a
)

target_link_libraries(
    native-lib
    mylib
)

mylib是预构建的库.native-lib要调用mylib.

mylib is the prebuilt library. native-lib want to call mylib.

也欢迎提供有关如何从scrath向项目添加.a文件的链接.

A link about how to add .a file to a project from scrath is also welcome.

推荐答案

add_library(
        my_static_lib
        STATIC
        IMPORTED
)
set_target_properties(features PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libmy_static_lib.a)

如您所见，我将这些 .a 文件放入

As you can see, i put those .a files in

projectNmae \ app \ src \ main \ jniLibs \ $ {ANDROID_ABI} \ ，

如果更改位置，请记住在 CMakeList.txt 中声明它.

if you change the location, remember to declare it in the CMakeList.txt.

我将 my_static_lib.h 放在 src \ main \ include 中，并在其他 .c/cpp 文件中使用它，例如:

I put my_static_lib.h in src\main\include, and use it in other .c/cpp file like:

#include "../include/features.h"

我的 BIGGEST 错误是错过的:

${CMAKE_SOURCE_DIR}

CMake无法在 src/main/app/native-lib.c ， SHARED 库很好的位置找到 STATIC 库 STATIC 库，这很奇怪.

CMake cannot find STATIC library in locations like src/main/app/native-lib.c, SHARED library is OK, not STATIC library, which is very strange.

导入是必须的，我尝试将其替换为整个位置路径，将无法使用.

And IMPORTED is a must, i tried replace it with the whole location path, won't work.

谢谢所有的评论和答案，我希望这个答案能对像我这样的新手有所帮助.

Thank you all the comments and answers, i hope this answer can help newbies like me.

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