讓Boost asio工作

Question

我正在嘗試使用Boost asio庫來插座。

我用自制brew install boost

安裝升壓它建成後，我試圖the tutorial創建於提升網站的服務器。

我所做的只是粘貼代碼到一個名爲main.cc

當我嘗試編譯g++ main.cc我得到這個錯誤：

Undefined symbols for architecture x86_64: 
"boost::system::system_category()", referenced from: 
    __static_initialization_and_destruction_0(int, int)in ccTbzxpk.o 
    boost::asio::error::get_system_category() in ccTbzxpk.o 
    boost::system::error_code::error_code()in ccTbzxpk.o 
"boost::system::generic_category()", referenced from: 
    __static_initialization_and_destruction_0(int, int)in ccTbzxpk.o 
ld: symbol(s) not found for architecture x86_64 
collect2: ld returned 1 exit status 

到底哪裏出問題了？

Answer 1

這些是linker errors。如果你讀了docs：

The following libraries must be available in order to link programs that use Boost.Asio:

Boost.System for the boost::system::error_code and boost::system::system_error classes. Boost.Regex (optional) if you use any of the read_until() or async_read_until() overloads that take a boost::regex parameter. OpenSSL (optional) if you use Boost.Asio's SSL support.

Furthermore, some of the examples also require the Boost.Thread, Boost.Date_Time or Boost.Serialization libraries.

現在，您發佈的所有錯誤說：boost::system，這意味着你需要這樣的（假設一切都是默認的）鏈接： g++ main.cc -lboost_system

請爲閱讀What do 'statically linked' and 'dynamically linked' mean?有關鏈接的深入信息。