未定义的符号X509_free引用

Question

我正在尝试使用mongodb遗留C++驱动程序.(这里的"遗产"意味着生产版本,fwiw.)在使用clang ++ 3.6和boost 1.55(来自ubuntu软件包存储库)并使用mongo-cxx-driver pull form git的ubuntu 15.04主机上,我编译了驱动程序然后尝试编译测试程序.

$ clang++ -std=c++14 mongo.cc -pthread -lmongoclient -lboost_thread \
  -lboost_system -lboost_regex -lssl -o mo

我看到这个错误:

clang++ -std=c++14 mongo.cc -pthread -lmongoclient -lboost_thread -lboost_system -lboost_regex -lssl -lcrypt -o mo
/usr/bin/ld: /usr/local/lib/libmongoclient.a(ssl_manager.o): undefined reference to symbol 'X509_free@@OPENSSL_1.0.0'
/lib/x86_64-linux-gnu/libcrypto.so.1.0.0: error adding symbols: DSO missing from command line
clang: error: linker command failed with exit code 1 (use -v to see invocation)

显然我很想念X509_free(),但似乎应该在libssl中(这是openSSL1.0.0,dpkg和库符号链接本身说).

非常感谢任何提示.

我认为这不重要,但这是mongo.cc:

#include <cstdlib>
#include <iostream>
#include "mongo/client/dbclient.h" // for the driver

void run() {
  mongo::DBClientConnection c;
  c.connect("localhost");
}

int main() {
    mongo::client::initialize();
    try {
        run();
        std::cout << "connected ok" << std::endl;
    } catch( const mongo::DBException &e ) {
        std::cout << "caught " << e.what() << std::endl;
    }
    return EXIT_SUCCESS;
}

Answer 1

你应该反对libcrypto.so,而不是libcrypt.so.