我在 Xcode 中有一个简单的项目——它实际上还没有做任何事情,只包括boost::asio::ssl
:
// main.cpp
#include <iostream>
#include <string>
#include <boost/asio.hpp>
#include <boost/asio/ssl.hpp>
using namespace std ;
int main (int argc, const char * argv [] ) {
return 0 ;
}
我将它与libssl.dylib
and链接,libboost_system.dylib
并在构建时得到它:
Undefined symbols for architecture x86_64:
"_CONF_modules_unload", referenced from:
boost::asio::ssl::detail::openssl_init_base::do_init::~do_init() in main.o
"_CRYPTO_cleanup_all_ex_data", referenced from:
boost::asio::ssl::detail::openssl_init_base::do_init::~do_init() in main.o
"_CRYPTO_num_locks", referenced from:
boost::asio::ssl::detail::openssl_init_base::do_init::do_init() in main.o
"_CRYPTO_set_id_callback", referenced from:
boost::asio::ssl::detail::openssl_init_base::do_init::do_init() in main.o
boost::asio::ssl::detail::openssl_init_base::do_init::~do_init() in main.o
"_CRYPTO_set_locking_callback", referenced from:
boost::asio::ssl::detail::openssl_init_base::do_init::do_init() in main.o
boost::asio::ssl::detail::openssl_init_base::do_init::~do_init() in main.o
"_ENGINE_cleanup", referenced from:
boost::asio::ssl::detail::openssl_init_base::do_init::~do_init() in main.o
"_ERR_free_strings", referenced from:
boost::asio::ssl::detail::openssl_init_base::do_init::~do_init() in main.o
"_ERR_reason_error_string", referenced from:
boost::asio::error::detail::ssl_category::message(int) const in main.o
"_ERR_remove_state", referenced from:
boost::asio::ssl::detail::openssl_init_base::do_init::~do_init() in main.o
"_EVP_cleanup", referenced from:
boost::asio::ssl::detail::openssl_init_base::do_init::~do_init() in main.o
"_OPENSSL_add_all_algorithms_noconf", referenced from:
boost::asio::ssl::detail::openssl_init_base::do_init::do_init() in main.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
是否还有其他一些我遗漏的图书馆或其他我忽略的东西?