Comments (2)
Caldfir
commented on August 23, 2024
I believe this is related to some warnings I'm getting from VisualStudio:
2>vcpkg\installed\x64-windows\include\cppfs/FilePath.h(348,23): warning C4251: 'cppfs::FilePath::m_path': class 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>' needs to have dll-interface to be used by clients of class 'cppfs::FilePath'
2>F:\Programs\VisualStudio\VC\Tools\MSVC\14.26.28801\include\xstring(4575): message : see declaration of 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>'
2>vcpkg\installed\x64-windows\include\cppfs/FilePath.h(352,35): warning C4251: 'cppfs::FilePath::m_fullPath': class 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>' needs to have dll-interface to be used by clients of class 'cppfs::FilePath'
2>F:\Programs\VisualStudio\VC\Tools\MSVC\14.26.28801\include\xstring(4575): message : see declaration of 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>'
2>vcpkg\installed\x64-windows\include\cppfs/FilePath.h(353,35): warning C4251: 'cppfs::FilePath::m_filename': class 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>' needs to have dll-interface to be used by clients of class 'cppfs::FilePath'
2>F:\Programs\VisualStudio\VC\Tools\MSVC\14.26.28801\include\xstring(4575): message : see declaration of 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>'
2>vcpkg\installed\x64-windows\include\cppfs/FilePath.h(354,35): warning C4251: 'cppfs::FilePath::m_basename': class 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>' needs to have dll-interface to be used by clients of class 'cppfs::FilePath'
2>F:\Programs\VisualStudio\VC\Tools\MSVC\14.26.28801\include\xstring(4575): message : see declaration of 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>'
2>vcpkg\installed\x64-windows\include\cppfs/FilePath.h(355,36): warning C4251: 'cppfs::FilePath::m_extension': class 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>' needs to have dll-interface to be used by clients of class 'cppfs::FilePath'
2>F:\Programs\VisualStudio\VC\Tools\MSVC\14.26.28801\include\xstring(4575): message : see declaration of 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>'
2>vcpkg\installed\x64-windows\include\cppfs/FilePath.h(356,40): warning C4251: 'cppfs::FilePath::m_directoryPath': class 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>' needs to have dll-interface to be used by clients of class 'cppfs::FilePath'
2>F:\Programs\VisualStudio\VC\Tools\MSVC\14.26.28801\include\xstring(4575): message : see declaration of 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>'
2>vcpkg\installed\x64-windows\include\cppfs/FilePath.h(357,38): warning C4251: 'cppfs::FilePath::m_driveLetter': class 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>' needs to have dll-interface to be used by clients of class 'cppfs::FilePath'
2>F:\Programs\VisualStudio\VC\Tools\MSVC\14.26.28801\include\xstring(4575): message : see declaration of 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>'
I'm sort of confused why the error is showing up when I'm building an executable, not a dll, and C4251 seems to explicitly be about dll compilation. It isn't hurting me, but warnings are annoying.
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lppinto
commented on August 23, 2024
If some include prototypes declares a class that has public or even private stl members, this might be the case… I for once would use the pimpl pattern to hide those complex members that don't have dll interface exports (stl templates) and would substitute those with getters to get more simplified types (std::string -> const char*)
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