結合使用libcurl和curlpp時發生編譯錯誤

Question

我想使用libcurl和cURLpp向服務器發送http POST請求。 當我嘗試編譯程序時，出現這些錯誤。 我認為錯誤不是來自libcurl或curlpp，所以我一定做錯了。
有人知道解決方案嗎？

Severity    Code    Description Project File    Line
Error   C2491   'curlpp::internal::OptionContainer<OptionType>::getValue': definition of dllimport function not allowed Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\internal\optioncontainer.inl 60
Error   C2491   'curlpp::internal::OptionContainer<OptionType>::OptionContainer': definition of dllimport function not allowed  Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\internal\optioncontainer.inl 39
Error   C2491   'curlpp::internal::OptionContainer<OptionType>::OptionContainer': definition of dllimport function not allowed  Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\internal\optioncontainer.inl 45
Error   C2491   'curlpp::internal::OptionContainer<OptionType>::setValue': definition of dllimport function not allowed Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\internal\optioncontainer.inl 53
Error   C2491   'curlpp::internal::OptionContainer<OptionType>::getHandleOptionValue': definition of dllimport function not allowed Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\internal\optioncontainer.inl 67
Error   C2491   'curlpp::internal::OptionSetter<OptionValueType,optionType>::setOpt': definition of dllimport function not allowed  Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\internal\optionsetter.inl    36
Error   C2491   'curlpp::internal::OptionSetter<std::string,optionType>::setOpt': definition of dllimport function not allowed  Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\internal\optionsetter.inl    45
Error   C2491   'curlpp::internal::OptionSetter<std::list<std::string,std::allocator<_Ty>>,optionType>::setOpt': definition of dllimport function not allowed   Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\internal\optionsetter.inl    54
Error   C2491   'curlpp::Option<OT>::Option': definition of dllimport function not allowed  Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\option.inl   45
Error   C2491   'curlpp::Option<OT>::Option': definition of dllimport function not allowed  Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\option.inl   52
Error   C2491   'curlpp::Option<OT>::Option': definition of dllimport function not allowed  Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\option.inl   63
Error   C2491   'curlpp::Option<OT>::~Option': definition of dllimport function not allowed Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\option.inl   71
Error   C2491   'curlpp::Option<OT>::setValue': definition of dllimport function not allowed    Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\option.inl   86
Error   C2491   'curlpp::Option<OT>::updateMeToOption': definition of dllimport function not allowed    Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\option.inl   99
Error   C2491   'curlpp::Option<OT>::clear': definition of dllimport function not allowed   Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\option.inl   107
Error   C2491   'curlpp::Option<OT>::getValue': definition of dllimport function not allowed    Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\option.inl   117
Error   C2491   'curlpp::OptionTrait<OptionType,opt>::OptionTrait': definition of dllimport function not allowed    Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\option.inl   125
Error   C2491   'curlpp::OptionTrait<OptionType,opt>::OptionTrait': definition of dllimport function not allowed    Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\option.inl   131
Error   C2491   'curlpp::OptionTrait<OptionType,opt>::clone': definition of dllimport function not allowed  Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\option.inl   139
Error   C2491   'curlpp::OptionTrait<OptionType,opt>::updateHandleToMe': definition of dllimport function not allowed   Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\option.inl   152
Error   C2491   'curlpp::NoValueOptionTrait<option>::NoValueOptionTrait': definition of dllimport function not allowed  Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\option.inl   160
Error   C2491   'curlpp::NoValueOptionTrait<option>::clone': definition of dllimport function not allowed   Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\option.inl   168
Error   C2491   'curlpp::NotAvailableOptionTrait<OptionType>::NotAvailableOptionTrait': definition of dllimport function not allowed    Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\option.inl   178
Error   C2491   'curlpp::NotAvailableOptionTrait<OptionType>::NotAvailableOptionTrait': definition of dllimport function not allowed    Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\option.inl   185
Error   C2491   'curlpp::NotAvailableOptionTrait<OptionType>::clone': definition of dllimport function not allowed  Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\option.inl   193
Error   C2491   'curlpp::NotAvailableOptionTrait<OptionType>::updateHandleToMe': definition of dllimport function not allowed   Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\curlpp\include\curlpp\option.inl   201
Error   C3867   'std::basic_ostringstream<char,std::char_traits<char>,std::allocator<char>>::str': non-standard syntax; use '&' to create a pointer to member   Projekt1    c:\users\otuser1\documents\visual studio 2015\projects\projekt1\projekt1\main.cpp   203

Answer 1

看起來標頭嘗試從dll導入（ CURLPP_STATICLIB ），但是還提供了定義，而從dll導入標頭時則不應該這樣做。

可能您需要在包含curlpp標頭之前定義CURLPP_STATICLIB ，或者可以修改在Visual Studio中設置庫的方式。 盡管由於我對dll和Visual Studio的經驗不足，所以我無法真正解釋您的外觀。

有關更具體的答案，請提供一些信息，說明如何將curlpp包含到項目/ Visual Studio中。