各位大神，小弟现在做Android的ndk开发，使用的是Studio，现在是使用jni调用已存在的原生c++代码，生成头文件后，把c++代码拷过来进行调用的时候，编译一直出现Error:error: ld returned 1 exit status，不能编译通过，也加extern "C" 了，ndk路径什么都没问题，而且c++代码在VS上进行编译的时候就能通过，困扰了好久，网上也找不到答案，希望大家帮帮忙。。
Error:error: ld returned 1 exit status
Error:Execution failed for task ':showbaby01:ndkBuild'.
> Process 'command 'D:\.../ndk-build.cmd'' finished with non-zero exit value 2
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Post more error information.
It is recommended to take a good look at "Advanced Programming with Android C++: Using NDK". Many issues that need attention will be answered for you one by one