问xcode上enable bitcode 设置为no，为什么编译报错？

设置enable bitcode为yes时：

报错：

ld: '/Users/uk/Desktop/Project/xcode/Libraries/Plugins/iOS/voice/libGCloudVoice.a(GCloudVoice_CSharp.o)' does not contain bitcode. You must rebuild it with bitcode enabled (Xcode setting ENABLE_BITCODE), obtain an updated library from the vendor, or disable bitcode for this target. for architecture arm64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

设置enable bitcode为no时：

报错：

Undefined symbols for architecture arm64:

"_SecPolicyCreateBasicX509", referenced from:

-[AVURLRequest URLSession:task:didReceiveChallenge:completionHandler:] in libGCloudVoice.a(urlrequest.o)

"_SecTrustSetAnchorCertificatesOnly", referenced from:

-[AVURLRequest URLSession:task:didReceiveChallenge:completionHandler:] in libGCloudVoice.a(urlrequest.o)

"_SecTrustSetPolicies", referenced from:

-[AVURLRequest connection:willSendRequestForAuthenticationChallenge:] in libGCloudVoice.a(urlrequest.o)

-[AVURLRequest URLSession:task:didReceiveChallenge:completionHandler:] in libGCloudVoice.a(urlrequest.o)

-[AVURLRequest URLSession:didReceiveChallenge:completionHandler:] in libGCloudVoice.a(urlrequest.o)

"_SecTrustCopyPolicies", referenced from:

-[AVURLRequest URLSession:task:didReceiveChallenge:completionHandler:] in libGCloudVoice.a(urlrequest.o)

"_SecPolicyCreateSSL", referenced from:

-[AVURLRequest connection:willSendRequestForAuthenticationChallenge:] in libGCloudVoice.a(urlrequest.o)

-[AVURLRequest URLSession:task:didReceiveChallenge:completionHandler:] in libGCloudVoice.a(urlrequest.o)

-[AVURLRequest URLSession:didReceiveChallenge:completionHandler:] in libGCloudVoice.a(urlrequest.o)

(maybe you meant: _OSX509Certificates_SecPolicyCreateSSL_m1432818148)

"_SecTrustEvaluate", referenced from:

-[AVURLRequest connection:willSendRequestForAuthenticationChallenge:] in libGCloudVoice.a(urlrequest.o)

-[AVURLRequest URLSession:didReceiveChallenge:completionHandler:] in libGCloudVoice.a(urlrequest.o)

(maybe you meant: _OSX509Certificates_SecTrustEvaluate_m1792892941)

ld: symbol(s) not found for architecture arm64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

其他几个依赖库已经加了。

请问是什么原因导致编译不通过。