Windows 7使用Boost ASIO的MinGW编译错误

本文介绍了Windows 7使用Boost ASIO的MinGW编译错误的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

在Windows 7上编译以下C ++代码时遇到问题：

  #include< boost / asio.hpp> 
 #include< iostream> 
 
 void handler1（const boost :: system :: error_code& ec）
 {
 std :: cout< 5秒。 << std :: endl; 
} 
 
 void handler2（const boost :: system :: error_code& ec）
 {
 std :: cout< 10秒。 << std :: endl; 
} 
 
 int main（）
 {
 boost :: asio :: io_service io_service; 
 boost :: asio :: deadline_timer timer1（io_service，boost :: posix_time :: seconds（5））; 
 timer1.async_wait（handler1）; 
 boost :: asio :: deadline_timer timer2（io_service，boost :: posix_time :: seconds（10））; 
 timer2.async_wait（handler2）; 
 io_service.run（）; 
}

我在 c：\mingw 与我的 PATH 正确设置。我已经下载boost并声明环境变量 BOOST_ROOT 是它所在的路径。我已经经历了升级的 bootstrap 和 b2 过程。我现在尝试编译：

  c：\path\to\sandbox> g ++ -I％BOOST_ROOT％-o main main.cpp

提供一堆 错误：':: UnregisterWaitEx'尚未声明 错误

然后我搜索一下，可能需要链接 boost_system 。所以：

  c：\path\to\sandbox> g ++ -I％BOOST_ROOT％-lboost_system -o main main.cpp

相同的错误。思想我会尝试指定库路径。搜索boost_system并在％BOOST_ROOT％/ stage / lib 中找到了静态库（libboost_system-mgw48-mt-1_55.a）。

  c：\path\to\sandbox> g ++ -I％BOOST_ROOT％-L％BOOST_ROOT％/ stage / lib -lboost_system-mgw48-mt-1_55 -o main main.cpp

相同的错误。因此，我再次搜索并查看其他人建议附加 -D-D_WIN32_WINNT = 0x0601 。

  c：\path\to\sandbox> g ++ -I％BOOST_ROOT％-L％BOOST_ROOT％/ stage / lib -lboost_system-mgw48-mt-1_55 -o main main.cpp -D_WIN32_WINNT = 0x0601

不可避免的错误：

  c： \mingw\include\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ 
 ^ 
c：\mingw\include\mswsock.h：125：36：错误：期望的主表达式'，'token 
 int WSAAPI WSAPoll（WSAPOLLFD，ULONG，INT ）; 
 ^ 
c：\mingw\include\mswsock.h：125：41：错误：预期的主表达式'）'token 
 int WSAAPI WSAPoll（WSAPOLLFD，ULONG，INT ）; 
 ^ 
c：\mingw\include\mswsock.h：125：41：错误：在初始化器中作为复合表达式处理的表达式列表[-fpermissive] 
  
 
 
 我会在哪里出错？
解决方案
我继续使用 b2 toolet = gcc --build-type = complete 重新构建Boost。同样的事情发生了。最后，毕竟，结果是我需要的是把命令的结尾连接：
  C： \path\to\sandbox> g ++ -D_WIN32_WINNT = 0x0601 -I％BOOST_ROOT％-L％BOOST_ROOT％\stage\lib -o boosttest boosttest.cpp -lwsock32 -lws2_32 -lboost_system-mgw48-mt-d-1_55 
 
 C ：\path\to\sandbox> boosttest.exe 
 5 s。 
 10 s。 
  
还需要 -D_WIN32_WINNT 对于跳过其他评论的任何人，我必须修补 winsock.h 详细。请记住在 PATH 中放置％BOOST_ROOT％\stage\lib ，以便Windows可以在运行时找到dll 。
 
 
 艰难
 
Having trouble compiling the following C++ code on Windows 7:
#include <boost/asio.hpp>
#include <iostream>

void handler1(const boost::system::error_code &ec)
{
  std::cout << "5 s." << std::endl;
}

void handler2(const boost::system::error_code &ec)
{
  std::cout << "10 s." << std::endl;
}

int main()
{
  boost::asio::io_service io_service;
  boost::asio::deadline_timer timer1(io_service, boost::posix_time::seconds(5));
  timer1.async_wait(handler1);
  boost::asio::deadline_timer timer2(io_service, boost::posix_time::seconds(10));
  timer2.async_wait(handler2);
  io_service.run();
}
I have MinGW installed (gcc 4.8.1) in c:\mingw with my PATH set up correctly.  I have downloaded boost and declared environment variable BOOST_ROOT to be the path where it resides.  I have gone through the bootstrap and b2 procedure for boost.  I now try and compile:
c:\path\to\sandbox> g++ -I%BOOST_ROOT% -o main main.cpp
Gives a bunch of error: '::UnregisterWaitEx' has not been declared errors
I then search a bit and see I may need to link boost_system.  So:
c:\path\to\sandbox> g++ -I%BOOST_ROOT% -lboost_system -o main main.cpp
Same errors.  Thought I'd try specify library path.  Did a search for boost_system and found static libs (libboost_system-mgw48-mt-1_55.a) in %BOOST_ROOT%/stage/lib. So
c:\path\to\sandbox> g++ -I%BOOST_ROOT% -L%BOOST_ROOT%/stage/lib -lboost_system-mgw48-mt-1_55 -o main main.cpp
Same errors.  So I search again and see others suggesting appending a -D-D_WIN32_WINNT=0x0601. So
c:\path\to\sandbox> g++ -I%BOOST_ROOT% -L%BOOST_ROOT%/stage/lib -lboost_system-mgw48-mt-1_55 -o main main.cpp -D_WIN32_WINNT=0x0601
And the inevitable errors:
c:\mingw\include\mswsock.h:125:20: error: 'WSAPOLLFD' was not declared in this scope
 int WSAAPI WSAPoll(WSAPOLLFD, ULONG, INT);
                ^
c:\mingw\include\mswsock.h:125:36: error: expected primary-expression before ',' token
 int WSAAPI WSAPoll(WSAPOLLFD, ULONG, INT);
                                ^
c:\mingw\include\mswsock.h:125:41: error: expected primary-expression before ')' token
 int WSAAPI WSAPoll(WSAPOLLFD, ULONG, INT);
                                     ^
c:\mingw\include\mswsock.h:125:41: error: expression list treated as compound     expression in initializer [-fpermissive]
Where am I going wrong?
 解决方案 
I went ahead and rebuilt Boost again with b2 toolset=gcc --build-type=complete. Same thing happened.  Finally, after all that, it turned out all I needed was to put the linking at the end of the command:
C:\path\to\sandbox> g++ -D_WIN32_WINNT=0x0601 -I%BOOST_ROOT% -L%BOOST_ROOT%\stage\lib -o boosttest boosttest.cpp -lwsock32 -lws2_32 -lboost_system-mgw48-mt-d-1_55

C:\path\to\sandbox> boosttest.exe
5 s.
10 s.
The -D_WIN32_WINNT was still necessary and, for anyone who has skipped the other comments, I had to patch winsock.h as detailed http://sourceforge.net/p/mingw/bugs/1980/.  And remember to put %BOOST_ROOT%\stage\lib in your PATH so Windows can find the dll at runtime.
Arduous
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