如何解决这些libcurl链接错误？
[[email protected] ~]$ g++ client.cpp -lcurl -o client.exe
C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ccKXFUtC.o:client.cpp:(.text+0x23): undefined reference to `_imp__curl_global_init'
C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ccKXFUtC.o:client.cpp:(.text+0x5f): undefined reference to `_imp__curl_formadd'
C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ccKXFUtC.o:client.cpp:(.text+0x9b): undefined reference to `_imp__curl_formadd'
C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ccKXFUtC.o:client.cpp:(.text+0xa2): undefined reference to `_imp__curl_easy_init'
C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ccKXFUtC.o:client.cpp:(.text+0xc8): undefined reference to `_imp__curl_easy_setopt'
C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ccKXFUtC.o:client.cpp:(.text+0xe4): undefined reference to `_imp__curl_easy_setopt'
C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ccKXFUtC.o:client.cpp:(.text+0xf1): undefined reference to `_imp__curl_easy_perform'
C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ccKXFUtC.o:client.cpp:(.text+0x101): undefined reference to `_imp__curl_easy_cleanup'
C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ccKXFUtC.o:client.cpp:(.text+0x10e): undefined reference to `_imp__curl_formfree'
C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ccKXFUtC.o:client.cpp:(.text+0x11b): undefined reference to `_imp__curl_slist_free_all'
collect2: ld returned 1 exit status
我没有在Linux上这个问题，所以我不知道为什么发生这种情况的窗口。我已经搜索了它，没有发现任何东西，除了邮件列表存档与相同的问题，并回复说“谷歌它”。如何解决这些libcurl链接错误？
我使用MinGW的。当我构建libcurl时，我确实收到了一些链接器警告，但他们似乎是ssl相关的，我不知道这是否是一个大问题，因为它没有错误。
*** Warning: linker path does not have real file for library -lssl.
*** I have the capability to make that library automatically link in when
*** you link to this library. But I can only do this if you have a
*** shared version of the library, which you do not appear to have
*** because I did check the linker path looking for a file starting
*** with libssl and none of the candidates passed a file format test
*** using a file magic. Last file checked: /ssl/lib/libssl.a
*** Warning: linker path does not have real file for library -lcrypto.
*** I have the capability to make that library automatically link in when
*** you link to this library. But I can only do this if you have a
*** shared version of the library, which you do not appear to have
*** because I did check the linker path looking for a file starting
*** with libcrypto and none of the candidates passed a file format test
*** using a file magic. Last file checked: /ssl/lib/libcrypto.a
*** Warning: linker path does not have real file for library -lz.
*** I have the capability to make that library automatically link in when
*** you link to this library. But I can only do this if you have a
*** shared version of the library, which you do not appear to have
*** because I did check the linker path looking for a file starting
*** with libz and none of the candidates passed a file format test
*** using a file magic. Last file checked: /mingw/lib//libz.a
*** The inter-library dependencies that have been dropped here will be
*** automatically added whenever a program is linked with this library
*** or is declared to -dlopen it.
*** Since this library must not contain undefined symbols,
*** because either the platform does not support them or
*** it was explicitly requested with -no-undefined,
*** libtool will only create a static version of it.
Libtool只构建一个静态libcurl而不是动态库。你的头文件正在寻找一个动态的libcurl。它可能不是libcurl中的错，因为我可以在支持的头看到代码__declspec(dllimport)和__declspec(dllexport)（这是一个好兆头包的作者知道什么是什么
技术细节：。see this answer regarding libssh
解决方案：-DCURL_STATICLIB编译。
我能够通过添加选项-lcurl.dll避免这些卷曲在Windows上链接（MinGW的win32）中的错误。-DCURL_STATICLIB并不需要我的情况。
我的构建有两个在MinGW的/ lib文件夹中的libcurl文件：libcurl.a and libcurl.dll.a
感谢解决我的问题的breadcrumb g ++：Code :: Blocks> Settings> Compiler> Linker settings> Add> lib \ libcurldll.a && lib \ libcurl.a – 2015-11-17 12:21:12
使用的NetBeans 7.1 MinGW的有同样的问题。从属性，链接器添加库libcurl.dll.a解决了我的问题。
此文件是下卷曲7.28.1 \ lib.libs位于后我跑了MinGW的化妆。
我有类似的错误（与libz进行和libsqlite）在不同的项目。 它由GNU libtool脚本生成。
在我的情况的原因是缺乏对这些库的一些文件中（.la？）也许libz.dll.a库的变体。
要拥有的automake/autoconf的构建./configure --prefix=... ; make所有必要的文件，你就必须建立zlib，crypto和ssl与configure和make按相同的MSYS。 cmake或自定义makefile构建通常不会作为共享库自动构建的依赖项。
另外，最简单的选择是建立动态卷曲通过CMake（https://github.com/bagder/curl.git）
嗯。我认为libcurl建立了静态和动态。 我试过-DCURL_STATICLIB，但现在我得到数百个链接器错误，说未定义引用WSAStartup @ 8，_imp__ares_library_init，ntohs @ 4，getsockopt @ 20等。 – VVV 2011-03-30 10:37:09
http://www.nomorepasting.com/getpaste.php?pasteid= 36044 – VVV 2011-03-30 10:47:50
您不链接任何相关的库。你需要（至少）-lwinsock2'加上其他库的'-l'标志（它看起来像OpenSSL，可能还有其他一两个）。 – 2011-03-30 23:10:36