我已经研究了几个小时(就在今天)，所以我真的需要一些帮助。我总是在 Windows 环境中编写代码，因此我尝试将 curlpp 添加到我的 Code::Blocks 项目中。

1. 我下载了 curl-7.22.0-devel-mingw32 并将所有这些库添加到 Code::Blocks 项目。
2. 我下载了 curl-7.22.0 并使用 vc6curl.dsw 编译了它，生成了 libcurl.lib，并将其添加到 Code::Blocks 项目中。
3. 已下载 curlpp-0.7.3
4. 将 MinGW\lib\libwsock32.a 添加到 Code::Blocks 项目。
5. 向项目中添加了以下目录: curlpp-0.7.3\include 和 curl-7.22.0\include

但是我收到很多“ undefined reference ”错误，所以我猜这意味着 curlpp 也需要编译。它包含一个 VC8 项目，所以我下载了 Visual C++ 2005 Express 并安装。

打开项目时遇到的第一个错误是无法加载示例。我想这不是真正的问题。尝试立即构建项目时出现错误“无法打开包含文件:'curl/curl.h'”，因此我将 cURL 包含文件夹 curl-7.22.0\include 添加到项目中，然后再试一次。

1>------ Build started: Project: curlpp, Configuration: DebugDynamic Win32 ------
1>Compiling...
1>cURLpp.cpp
1>C:\Users\admin\Downloads\curl-7.22.0\curl-7.22.0\include\curl/curl.h(62) : fatal error C1083: Cannot open include file: 'winsock2.h': No such file or directory
1>Easy.cpp
1>C:\Users\admin\Downloads\curl-7.22.0\curl-7.22.0\include\curl/curl.h(62) : fatal error C1083: Cannot open include file: 'winsock2.h': No such file or directory
1>Exception.cpp
1>C:\Users\admin\Downloads\curl-7.22.0\curl-7.22.0\include\curl/curl.h(62) : fatal error C1083: Cannot open include file: 'winsock2.h': No such file or directory
1>Form.cpp
1>C:\Users\admin\Downloads\curl-7.22.0\curl-7.22.0\include\curl/curl.h(62) : fatal error C1083: Cannot open include file: 'winsock2.h': No such file or directory
1>Info.cpp
1>C:\Users\admin\Downloads\curl-7.22.0\curl-7.22.0\include\curl/curl.h(62) : fatal error C1083: Cannot open include file: 'winsock2.h': No such file or directory
1>Multi.cpp
1>C:\Users\admin\Downloads\curl-7.22.0\curl-7.22.0\include\curl/curl.h(62) : fatal error C1083: Cannot open include file: 'winsock2.h': No such file or directory
1>OptionBase.cpp
1>C:\Users\admin\Downloads\curl-7.22.0\curl-7.22.0\include\curl/curl.h(62) : fatal error C1083: Cannot open include file: 'winsock2.h': No such file or directory
1>Options.cpp
1>C:\Users\admin\Downloads\curl-7.22.0\curl-7.22.0\include\curl/curl.h(62) : fatal error C1083: Cannot open include file: 'winsock2.h': No such file or directory
1>CurlHandle.cpp
1>C:\Users\admin\Downloads\curl-7.22.0\curl-7.22.0\include\curl/curl.h(62) : fatal error C1083: Cannot open include file: 'winsock2.h': No such file or directory
1>OptionList.cpp
1>C:\Users\admin\Downloads\curl-7.22.0\curl-7.22.0\include\curl/curl.h(62) : fatal error C1083: Cannot open include file: 'winsock2.h': No such file or directory
1>OptionSetter.cpp
1>C:\Users\admin\Downloads\curl-7.22.0\curl-7.22.0\include\curl/curl.h(62) : fatal error C1083: Cannot open include file: 'winsock2.h': No such file or directory
1>SList.cpp
1>C:\Users\admin\Downloads\curl-7.22.0\curl-7.22.0\include\curl/curl.h(62) : fatal error C1083: Cannot open include file: 'winsock2.h': No such file or directory
1>WIN32
1>c1xx : fatal error C1083: Cannot open source file: 'WIN32': Permission denied
1>Generating Code...
1>Project : warning PRJ0018 : The following environment variables were not found:
1>$(BOOST_PATH)
1>$(LIBCURL_PATH)
1>Build log was saved at "file://c:\Users\admin\Downloads\curlpp-0.7.3-2\curlpp-0.7.3\DebugDynamic\BuildLog.htm"
1>curlpp - 13 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

一个错误接一个错误，快把我逼疯了。谷歌搜索也没有真正的帮助。我发现一些论坛帖子说必须添加 WS2_32.Lib，它位于 C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Lib 但将其添加到库文件夹中在 VS2005 项目中似乎没有做任何事情。

我只是失去了对这一切的追踪.. 这应该如何进行？我认为这会很简单:

1. 编译curl
2. 编译curlpp
3. 利润!

但不幸的是，这似乎并不那么容易。

更新

哦对了，我忘了，最初我也有这些错误:

c1xx : fatal error C1083: Cannot open source file: '.\src\curlpp\Infos.cpp': No such file or directory

c1xx : fatal error C1083: Cannot open source file: '.\src\curlpp\Option.cpp': No such file or directory

c1xx : fatal error C1083: Cannot open source file: '.\src\utilspp\singleton\LifetimeLibrary.cpp': No such file or directory

c1xx : fatal error C1083: Cannot open source file: '.\src\utilspp\singleton\PrivateMembers.cpp': No such file or directory

但是在src\curlpp中有:

Info.cpp
Options.cpp

所以我只是复制它们并将拷贝重命名为

Info2.cpp
Option.cpp

而在src\utilspp中有

LifetimeLibrary.cpp
PrivateMembers.cpp

所以我只是在那里创建了一个文件夹“singleton”并将文件复制到那里。

好像 curlpp 是..坏了？但这一定是我在做的事情很奇怪，因为有人会注意到!

更新2 好的，我从头开始，发现我还必须从 Windows SDK 添加 includes 文件夹。这解决了 Cannot open include file: 'winsock2.h' 错误。但是现在我遇到了一大堆其他错误:

1>------ Build started: Project: curlpp, Configuration: DebugDynamic Win32 ------
1>Linking...
1>Infos.obj : error LNK2005: "public: static void __cdecl curlpp::InfoTypeConverter<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > >::get(class curlpp::Easy &,enum CURLINFO,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > &)" (?get@?$InfoTypeConverter@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@curlpp@@SAXAAVEasy@2@W4CURLINFO@@AAV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) already defined in Info.obj
1>Infos.obj : error LNK2005: "public: static void __cdecl curlpp::InfoTypeConverter<class std::list<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > >::get(class curlpp::Easy &,enum CURLINFO,class std::list<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > &)" (?get@?$InfoTypeConverter@V?$list@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$allocator@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@2@@std@@@curlpp@@SAXAAVEasy@2@W4CURLINFO@@AAV?$list@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$allocator@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@2@@std@@@Z) already defined in Info.obj
1>Infos.obj : error LNK2005: "public: static void __cdecl curlpp::InfoTypeConverter<long>::get(class curlpp::Easy &,enum CURLINFO,long &)" (?get@?$InfoTypeConverter@J@curlpp@@SAXAAVEasy@2@W4CURLINFO@@AAJ@Z) already defined in Info.obj
1>Infos.obj : error LNK2005: "public: static void __cdecl curlpp::InfoTypeConverter<double>::get(class curlpp::Easy &,enum CURLINFO,double &)" (?get@?$InfoTypeConverter@N@curlpp@@SAXAAVEasy@2@W4CURLINFO@@AAN@Z) already defined in Info.obj
1>Options.obj : error LNK2005: "class std::basic_ostream<char,struct std::char_traits<char> > & __cdecl operator<<(class std::basic_ostream<char,struct std::char_traits<char> > &,class curlpp::OptionTrait<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,10002> const &)" (??6@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@std@@AAV01@ABV?$OptionTrait@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@$0CHBC@@curlpp@@@Z) already defined in Option.obj
1>   Creating library DebugDynamic\curlpp.lib and object DebugDynamic\curlpp.exp
1>cURLpp.obj : error LNK2019: unresolved external symbol __imp__curl_global_init referenced in function "void __cdecl curlpp::initialize(long)" (?initialize@curlpp@@YAXJ@Z)
1>cURLpp.obj : error LNK2019: unresolved external symbol __imp__curl_global_cleanup referenced in function "void __cdecl curlpp::terminate(void)" (?terminate@curlpp@@YAXXZ)
1>cURLpp.obj : error LNK2019: unresolved external symbol __imp__curl_free referenced in function "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl curlpp::escape(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?escape@curlpp@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@ABV23@@Z)
1>cURLpp.obj : error LNK2019: unresolved external symbol __imp__curl_escape referenced in function "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl curlpp::escape(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?escape@curlpp@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@ABV23@@Z)
1>cURLpp.obj : error LNK2019: unresolved external symbol __imp__curl_unescape referenced in function "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl curlpp::unescape(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?unescape@curlpp@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@ABV23@@Z)
1>cURLpp.obj : error LNK2019: unresolved external symbol __imp__curl_getenv referenced in function "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl curlpp::getenv(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?getenv@curlpp@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@ABV23@@Z)
1>cURLpp.obj : error LNK2019: unresolved external symbol __imp__curl_version referenced in function "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl curlpp::libcurlVersion(void)" (?libcurlVersion@curlpp@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ)
1>cURLpp.obj : error LNK2019: unresolved external symbol __imp__curl_getdate referenced in function "__int64 __cdecl curlpp::getdate(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,__int64 *)" (?getdate@curlpp@@YA_JABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@PA_J@Z)
1>Form.obj : error LNK2019: unresolved external symbol __imp__curl_formfree referenced in function "public: void __thiscall curlpp::HttpPost::clear(void)" (?clear@HttpPost@curlpp@@QAEXXZ)
1>Form.obj : error LNK2019: unresolved external symbol __imp__curl_formadd referenced in function "private: virtual void __thiscall curlpp::FormParts::File::add(struct curl_httppost * *,struct curl_httppost * *)" (?add@File@FormParts@curlpp@@EAEXPAPAUcurl_httppost@@0@Z)
1>Info.obj : error LNK2019: unresolved external symbol __imp__curl_easy_getinfo referenced in function "public: void __thiscall curlpp::internal::CurlHandle::getInfo<char *>(enum CURLINFO,char * &)" (??$getInfo@PAD@CurlHandle@internal@curlpp@@QAEXW4CURLINFO@@AAPAD@Z)
1>Infos.obj : error LNK2001: unresolved external symbol __imp__curl_easy_getinfo
1>Multi.obj : error LNK2019: unresolved external symbol __imp__curl_multi_init referenced in function "public: __thiscall curlpp::Multi::Multi(void)" (??0Multi@curlpp@@QAE@XZ)
1>Multi.obj : error LNK2019: unresolved external symbol __imp__curl_multi_cleanup referenced in function "public: __thiscall curlpp::Multi::~Multi(void)" (??1Multi@curlpp@@QAE@XZ)
1>Multi.obj : error LNK2019: unresolved external symbol __imp__curl_multi_remove_handle referenced in function "public: __thiscall curlpp::Multi::~Multi(void)" (??1Multi@curlpp@@QAE@XZ)
1>Multi.obj : error LNK2019: unresolved external symbol __imp__curl_multi_strerror referenced in function "public: void __thiscall curlpp::Multi::add(class curlpp::Easy const *)" (?add@Multi@curlpp@@QAEXPBVEasy@2@@Z)
1>Multi.obj : error LNK2019: unresolved external symbol __imp__curl_multi_add_handle referenced in function "public: void __thiscall curlpp::Multi::add(class curlpp::Easy const *)" (?add@Multi@curlpp@@QAEXPBVEasy@2@@Z)
1>Multi.obj : error LNK2019: unresolved external symbol __imp__curl_multi_perform referenced in function "public: bool __thiscall curlpp::Multi::perform(int *)" (?perform@Multi@curlpp@@QAE_NPAH@Z)
1>Multi.obj : error LNK2019: unresolved external symbol __imp__curl_multi_fdset referenced in function "public: void __thiscall curlpp::Multi::fdset(struct fd_set *,struct fd_set *,struct fd_set *,int *)" (?fdset@Multi@curlpp@@QAEXPAUfd_set@@00PAH@Z)
1>Multi.obj : error LNK2019: unresolved external symbol __imp__curl_multi_info_read referenced in function "public: class std::list<struct std::pair<class curlpp::Easy const *,struct curlpp::Multi::Info>,class std::allocator<struct std::pair<class curlpp::Easy const *,struct curlpp::Multi::Info> > > __thiscall curlpp::Multi::info(void)" (?info@Multi@curlpp@@QAE?AV?$list@U?$pair@PBVEasy@curlpp@@UInfo@Multi@2@@std@@V?$allocator@U?$pair@PBVEasy@curlpp@@UInfo@Multi@2@@std@@@2@@std@@XZ)
1>Option.obj : error LNK2019: unresolved external symbol __imp__curl_easy_setopt referenced in function "public: void __thiscall curlpp::internal::CurlHandle::option<void *>(enum CURLoption,void *)" (??$option@PAX@CurlHandle@internal@curlpp@@QAEXW4CURLoption@@PAX@Z)
1>Options.obj : error LNK2001: unresolved external symbol __imp__curl_easy_setopt
1>CurlHandle.obj : error LNK2001: unresolved external symbol __imp__curl_easy_setopt
1>OptionSetter.obj : error LNK2001: unresolved external symbol __imp__curl_easy_setopt
1>CurlHandle.obj : error LNK2019: unresolved external symbol __imp__curl_easy_perform referenced in function "public: void __thiscall curlpp::internal::CurlHandle::perform(void)" (?perform@CurlHandle@internal@curlpp@@QAEXXZ)
1>CurlHandle.obj : error LNK2019: unresolved external symbol __imp__curl_easy_reset referenced in function "public: void __thiscall curlpp::internal::CurlHandle::reset(void)" (?reset@CurlHandle@internal@curlpp@@QAEXXZ)
1>CurlHandle.obj : error LNK2019: unresolved external symbol __imp__curl_easy_init referenced in function "public: __thiscall curlpp::internal::CurlHandle::CurlHandle(void)" (??0CurlHandle@internal@curlpp@@QAE@XZ)
1>CurlHandle.obj : error LNK2019: unresolved external symbol __imp__curl_easy_duphandle referenced in function "public: class std::auto_ptr<class curlpp::internal::CurlHandle> __thiscall curlpp::internal::CurlHandle::clone(void)const " (?clone@CurlHandle@internal@curlpp@@QBE?AV?$auto_ptr@VCurlHandle@internal@curlpp@@@std@@XZ)
1>CurlHandle.obj : error LNK2019: unresolved external symbol __imp__curl_easy_cleanup referenced in function "public: virtual __thiscall curlpp::internal::CurlHandle::~CurlHandle(void)" (??1CurlHandle@internal@curlpp@@UAE@XZ)
1>SList.obj : error LNK2019: unresolved external symbol __imp__curl_slist_free_all referenced in function "private: void __thiscall curlpp::internal::SList::clear(void)" (?clear@SList@internal@curlpp@@AAEXXZ)
1>SList.obj : error LNK2019: unresolved external symbol __imp__curl_slist_append referenced in function "private: void __thiscall curlpp::internal::SList::update(void)" (?update@SList@internal@curlpp@@AAEXXZ)
1>DebugDynamic\curlpp.dll : fatal error LNK1120: 27 unresolved externals
1>Project : warning PRJ0018 : The following environment variables were not found:
1>$(BOOST_PATH)
1>Build log was saved at "file://c:\Users\admin\Downloads\curlpp-0.7.3\curlpp-0.7.3\DebugDynamic\BuildLog.htm"
1>curlpp - 37 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

这会结束吗？

其他库现在看起来像这样:

"C:\Users\admin\Downloads\curl-7.22.0\curl-7.22.0\lib\Debug";
"C:\Program Files (x86)\CodeBlocks\MinGW\lib";
"C:\Users\admin\Downloads\curl-7.22.0\curl-7.22.0\lib";
"C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Lib";
"C:\Program Files\Microsoft SDKs\Windows\v7.1\Lib"

包括:

"C:\Program Files\Microsoft SDKs\Windows\v7.1\Include";
"C:\Users\admin\Downloads\curl-7.22.0\curl-7.22.0\include";
.\;
include\curlpp;
include;
"$(BOOST_PATH)"

什么是提升路径？

另外，为了消除“找不到 libcurl.lib”错误，我打开了在 curl-7.22.0 中找到的项目并编译了它，但这意味着 libcurl.lib 在“lib\Debug”中我在上面看到的文件夹，我做对了吗？

更新 3:

我注意到一个名为 create-vc-solution.bat 的文件，所以在为 Windows 下载“sed”之后，我尝试为 VS9 创建一个 vc 解决方案(没有 10 的选项)希望会工作，但这是我打开在 VS2010 中创建的解决方案文件时得到的:

Converting project file 'C:\Users\admin\Downloads\curlpp-0.7.3\curlpp-0.7.3\curlpp.examples.VC9.vcproj'. 
File 'C:\Users\admin\Downloads\curlpp-0.7.3\curlpp-0.7.3\curlpp.examples.VC9.vcproj' was not found. 
Project upgrade failed. 

Converting project file 'C:\Users\admin\Downloads\curlpp-0.7.3\curlpp-0.7.3\curlpp.VC9.vcproj'. 
File 'C:\Users\admin\Downloads\curlpp-0.7.3\curlpp-0.7.3\curlpp.VC9.vcproj' was not found. 
Project upgrade failed. 

curlpp.examples.VC9.vcproj 和 curlpp.VC9.vcproj 从未创建过。 curlpp 是否已经过测试？任何人？我开始认为这甚至不再是我的错。

最佳答案

我看到你正在将 curlpp 编译成动态库。那是你想要的吗？您应该将 libcurl.lib 添加到链接器输入中。

关于c++ - 无法编译 curlpp，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/8003646/