不能包含boost文件系统标题 [英] can't include boost filesystem header

问题描述

我有一个大项目。

在 N.cpp中我需要使用 boost :: filesystem :: exists路径）来检查路径是否有效。

为此，我包含< boost / filesystem.hpp>
我收到以下错误：

 错误2错误LNK2005：public：enum boost :: filesystem :: file_type __cdecl boost :: filesystem :: file_status：已经在N.obj中定义了：type（void）const（？type @ file_status @ filesystem @ boost @@ QEBA？AW4file_type @ 23 @ XZ）D：\ MProject \ DA \ boost_filesystem-vc100-mt-gd- 1_53.lib（boost_filesystem-vc100-mt-gd-1_53.dll）DA 
 
错误1错误LNK2005：public：__cdecl boost :: filesystem :: path ::〜path（void）（ 1obpath @ filesystem @ boost @@ QEAA @ XZ）已经在N.obj中定义了D：\ MProject \DAboost_filesystem-vc100-mt-gd-1_53.lib（boost_filesystem-vc100-mt-gd-1_53.dll） DA 
 
错误3错误LNK1104：无法打开文件'libboost_filesystem-vc100-mt-gd-1_53.lib'D：\MProject\DA\LINK DA 
  

如果我不包含头文件，我会得到：

 错误2错误C3861：存在'：标识符未找到D：\ MProject \ DA\ThirdParty\N.cpp 108 1 DA 
错误1错误C2653：'boost'：不是类或名称空间名称D：\ MProject \DA\ThirdParty\N.cpp 108 1 DA 
  

那么什么是正确的方法来使用boost :: filesystem :: exists，以便整个事情能够被编译？

N.cpp

  #include< boost / filesystem.hpp> 
 ..... 
 CHECK（boost :: filesystem :: exists（* i），std :: string（file）.append（* i）.append（does not exist ）.c_str（））; 
 
 ..... 
  

解决方案

我通过添加到N.cpp解决了问题：

  #ifndef BOOST_ALL_DYN_LINK 
＃define BOOST_ALL_DYN_LINK 
 #endif 
 #include< boost / filesystem.hpp> 
  

I have a big project.

In N.cpp I need to use boost::filesystem::exists(path) to check if the path is valid.

For that, I include <boost/filesystem.hpp> I get the following error:

Error   2   error LNK2005: "public: enum boost::filesystem::file_type __cdecl boost::filesystem::file_status::type(void)const " (?type@file_status@filesystem@boost@@QEBA?AW4file_type@23@XZ) already defined in N.obj  D:\MProject\DA\boost_filesystem-vc100-mt-gd-1_53.lib(boost_filesystem-vc100-mt-gd-1_53.dll) DA

Error   1   error LNK2005: "public: __cdecl boost::filesystem::path::~path(void)" (??1path@filesystem@boost@@QEAA@XZ) already defined in N.obj  D:\MProject\DAboost_filesystem-vc100-mt-gd-1_53.lib(boost_filesystem-vc100-mt-gd-1_53.dll)  DA

Error   3   error LNK1104: cannot open file 'libboost_filesystem-vc100-mt-gd-1_53.lib'  D:\MProject\DA\LINK DA

If I do not include the header file, I get :

Error   2   error C3861: 'exists': identifier not found D:\MProject\DA\ThirdParty\N.cpp 108 1   DA
Error   1   error C2653: 'boost' : is not a class or namespace name D:\MProject\DA\ThirdParty\N.cpp 108 1   DA

So What is the right way to use boost::filesystem::exists so that the whole thing would compile?

N.cpp

#include <boost/filesystem.hpp>
.....
CHECK( boost::filesystem::exists(*i), std::string("file ").append(*i).append(" does not exist").c_str() );

.....

解决方案

I solved the problem by adding to N.cpp:

#ifndef BOOST_ALL_DYN_LINK
#   define BOOST_ALL_DYN_LINK
#endif 
#include <boost/filesystem.hpp>

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