解决集成 FFmpeg 时编译报错问题

原文链接：https://debugly.cn/2019/02/15-integration-ffmpeg-error.html

 

死记这些没一点用，反而会浪费脑细胞，只要找到通用解决方法才好，你可以问度娘，但是度娘也不知道怎么办？

下面就来看下出错信息吧，比如:

Undefined symbols for architecture x86_64:
  "_SSLClose", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
      _tls_close in libavformat.a(tls_securetransport.o)
  "_SSLCopyPeerTrust", 

可以看到是因为 _SSLClose 这个符号未定义导致了出错，而这个符号是在 tls_open 这个方法里使用的。tls_open 方法就在 libavformat 库里 tls_securetransport.c 文件中，因此找到 tls_securetransport.c 这个文件，你会发现:

#include 
#include 

所以就知道了，FFmpeg 需要 Security.framework 这个框架。

 

Undefined symbols for architecture x86_64:
  "_SSLClose", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
      _tls_close in libavformat.a(tls_securetransport.o)
  "_SSLCopyPeerTrust", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLCreateContext", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLHandshake", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLRead", referenced from:
      _tls_read in libavformat.a(tls_securetransport.o)
  "_SSLSetCertificate", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLSetConnection", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLSetIOFuncs", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLSetPeerDomainName", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLSetSessionOption", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLWrite", referenced from:
      _tls_write in libavformat.a(tls_securetransport.o)
  "_SecIdentityCreate", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SecItemImport", referenced from:
      _import_pem in libavformat.a(tls_securetransport.o)
  "_SecTrustEvaluate", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SecTrustSetAnchorCertificates", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
ld: symbol(s) not found for architecture x86_64