macos 上这段程序应该链接什么库-灵析社区

``` c #include #include #include int main() { CSIdentityQueryRef query = CSIdentityQueryCreateForCurrentUser(kCFAllocatorSystemDefault); CFErrorRef error; uint8 qdata[1024] = {0}; if (CSIdentityQueryExecute(query, kCSIdentityQueryGenerateUpdateEvents, &error)) { CFArrayRef foundIds = CSIdentityQueryCopyResults(query); if (CFArrayGetCount(foundIds) == 1) { CSIdentityRef userId = (CSIdentityRef) CFArrayGetValueAtIndex(foundIds, 0); CFDataRef data = CSIdentityGetImageData(userId); CFDataGetBytes(data, CFRangeMake(0, CFDataGetLength(data)), qdata); } } CFRelease(query); } ``` 这段代码是获取当前用户的头像路径。 我用 g++ 编译的时候报错， ``` language ethson@macbookpro:~/Project/cpp_example$ g++ ./example.cpp -o exam Undefined symbols for architecture x86_64: "_CFArrayGetCount", referenced from: _main in example-7e578a.o "_CFArrayGetValueAtIndex", referenced from: _main in example-7e578a.o "_CFDataGetBytes", referenced from: _main in example-7e578a.o "_CFDataGetLength", referenced from: _main in example-7e578a.o "_CFRelease", referenced from: _main in example-7e578a.o "_CSIdentityGetImageData", referenced from: _main in example-7e578a.o "_CSIdentityQueryCopyResults", referenced from: _main in example-7e578a.o "_CSIdentityQueryCreateForCurrentUser", referenced from: _main in example-7e578a.o "_CSIdentityQueryExecute", referenced from: _main in example-7e578a.o "_kCFAllocatorSystemDefault", referenced from: _main in example-7e578a.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) ``` 我猜测是没有链接系统库造成的，但是我查了一圈，也没找到应该链接哪个库，求指教。