我尝试在 os x 10.11 下编译 php5.6.14，得到如下错误？如何解决？

 Undefined symbols for architecture x86_64:
  "_PKCS5_PBKDF2_HMAC", referenced from:
      _zif_openssl_pbkdf2 in openssl.o
  "_TLSv1_1_client_method", referenced from:
      _php_openssl_setup_crypto in xp_ssl.o
  "_TLSv1_1_server_method", referenced from:
      _php_openssl_setup_crypto in xp_ssl.o
  "_TLSv1_2_client_method", referenced from:
      _php_openssl_setup_crypto in xp_ssl.o
  "_TLSv1_2_server_method", referenced from:
      _php_openssl_setup_crypto in xp_ssl.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [sapi/cli/php] Error 1