c++ - OSX 10.8.2 上的 Poco C++ 库 : Undefined symbols for architecture x86_64

Question

我正在尝试使用 Poco C++ 库，用于在 Mac OS X 10.8.2 上使用 C++ 执行简单的 http 请求。我安装了 Poco，从 this tutorial 复制粘贴了 http_request.cc 代码, 用 'g++ -o http_get http_get.cc -lPocoNet' 运行它，但得到:

Undefined symbols for architecture x86_64:
  "Poco::StreamCopier::copyStream(std::basic_istream<char, std::char_traits<char> >&, std::basic_ostream<char, std::char_traits<char> >&, unsigned long)", referenced from:
      _main in ccKuZb1g.o
  "Poco::URI::URI(char const*)", referenced from:
      _main in ccKuZb1g.o
  "Poco::URI::~URI()", referenced from:
      _main in ccKuZb1g.o
  "Poco::URI::getPathAndQuery() const", referenced from:
      _main in ccKuZb1g.o
  "Poco::URI::getPort() const", referenced from:
      _main in ccKuZb1g.o
  "Poco::Exception::displayText() const", referenced from:
      _main in ccKuZb1g.o
  "typeinfo for Poco::Exception", referenced from:
      GCC_except_table1 in ccKuZb1g.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status

已经为此苦苦挣扎了几个小时。知道如何解决这个问题吗？提前致谢!

Answer 1

Poco::URI、Poco::StreamCopier 类位于 PocoFoundation 库中，因此您需要链接到该库还有。

g++ -o http_get http_get.cc -lPocoNet -lPocoFoundation