我正在尝试在此处编译x2on创建的示例iPhone openssl:
https://github.com/x2on/OpenSSL-for-iPhone

尝试在Xcode 4.3.3中进行编译时出现以下错误:

Undefined symbols for architecture i386:

 "_MD5", referenced from:

     -[ViewController calculateMD5:] in ViewController.o

 "_SHA256_Init", referenced from:

     -[ViewController calculateSHA256:] in ViewController.o

 "_SHA256_Update", referenced from:

     -[ViewController calculateSHA256:] in ViewController.o

 "_SHA256_Final", referenced from:

     -[ViewController calculateSHA256:] in ViewController.o

ld: symbol(s) not found for architecture i386

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

最佳答案

根据this site的指示，它表明您需要与libcrypto链接。

https://stackoverflow.com/questions/11055392/