ld.exe 找不到-lcurl

发布于 2024-10-16 10:26:47 字数 3993 浏览 2 评论 0原文

（我发现了一个与此类似的问题，但它已经有 2 年历史了。）

我正在 Visual C++ 2008 中开发一个 Windows 窗体应用程序，它使用 libCurl 的 FTP 功能。尽管我已将 lib 和 include 目录添加到包含和库搜索路径，将 libcurl_imp.lib 添加到其他依赖项，并将 CURL_STATICLIB 添加到预处理器定义，但在构建它时出现 14 个链接器错误。我检查了 cURL 常见问题解答并用 Google 搜索了一些错误，但我还没有找到解决方案。链接器错误如下：（

1>-------.obj : error LNK2031: unable to generate p/invoke for "extern "C" void __clrcall curl_easy_cleanup(void *)" (?curl_easy_cleanup@@$$J0YMXPAX@Z); calling convention missing in metadata
1>-------.obj : error LNK2031: unable to generate p/invoke for "extern "C" enum CURLcode __clrcall curl_easy_perform(void *)" (?curl_easy_perform@@$$J0YM?AW4CURLcode@@PAX@Z); calling convention missing in metadata
1>-------.obj : error LNK2031: unable to generate p/invoke for "extern "C" enum CURLcode __clrcall curl_easy_setopt(void *,enum CURLoption,...)" (?curl_easy_setopt@@$$J0YM?AW4CURLcode@@PAXW4CURLoption@@ZZ); calling convention missing in metadata
1>-------.obj : error LNK2031: unable to generate p/invoke for "extern "C" void * __clrcall curl_easy_init(void)" (?curl_easy_init@@$$J0YMPAXXZ); calling convention missing in metadata
1>-------.obj : error LNK2028: unresolved token (0A00000E) "extern "C" void __clrcall curl_easy_cleanup(void *)" (?curl_easy_cleanup@@$$J0YMXPAX@Z) referenced in function "int __clrcall main(cli::array<class System::String ^ >^)" (?main@@$$HYMHP$01AP$AAVString@System@@@Z)
1>-------.obj : error LNK2028: unresolved token (0A00000F) "extern "C" enum CURLcode __clrcall curl_easy_perform(void *)" (?curl_easy_perform@@$$J0YM?AW4CURLcode@@PAX@Z) referenced in function "int __clrcall main(cli::array<class System::String ^ >^)" (?main@@$$HYMHP$01AP$AAVString@System@@@Z)
1>-------.obj : error LNK2020: unresolved token (0A000010) "extern "C" enum CURLcode __clrcall curl_easy_setopt(void *,enum CURLoption,...)" (?curl_easy_setopt@@$$J0YM?AW4CURLcode@@PAXW4CURLoption@@ZZ)
1>-------.obj : error LNK2020: unresolved token (0A000011) "extern "C" enum CURLcode __clrcall curl_easy_setopt(void *,enum CURLoption,...)" (?curl_easy_setopt@@$$J0YM?AW4CURLcode@@PAXW4CURLoption@@ZZ)
1>-------.obj : error LNK2028: unresolved token (0A000012) "extern "C" void * __clrcall curl_easy_init(void)" (?curl_easy_init@@$$J0YMPAXXZ) referenced in function "int __clrcall main(cli::array<class System::String ^ >^)" (?main@@$$HYMHP$01AP$AAVString@System@@@Z)
1>-------.obj : error LNK2019: unresolved external symbol "extern "C" void __clrcall curl_easy_cleanup(void *)" (?curl_easy_cleanup@@$$J0YMXPAX@Z) referenced in function "int __clrcall main(cli::array<class System::String ^ >^)" (?main@@$$HYMHP$01AP$AAVString@System@@@Z)
1>-------.obj : error LNK2019: unresolved external symbol "extern "C" enum CURLcode __clrcall curl_easy_perform(void *)" (?curl_easy_perform@@$$J0YM?AW4CURLcode@@PAX@Z) referenced in function "int __clrcall main(cli::array<class System::String ^ >^)" (?main@@$$HYMHP$01AP$AAVString@System@@@Z)
1>-------.obj : error LNK2001: unresolved external symbol "extern "C" enum CURLcode __clrcall curl_easy_setopt(void *,enum CURLoption,...)" (?curl_easy_setopt@@$$J0YM?AW4CURLcode@@PAXW4CURLoption@@ZZ)
1>-------.obj : error LNK2019: unresolved external symbol "extern "C" void * __clrcall curl_easy_init(void)" (?curl_easy_init@@$$J0YMPAXXZ) referenced in function "int __clrcall main(cli::array<class System::String ^ >^)" (?main@@$$HYMHP$01AP$AAVString@System@@@Z)

我删除了项目名称。）

是什么原因导致的，如何防止它？谢谢 :)

更新

我已经切换到 Code::Blocks，现在它是一个本机 Win32 GUI 应用程序。我没有得到所有这些链接器错误，但我确实得到了一些东西：

ld.exe cannot find -lcurl.lib

我没有将 include 和 lib 目录添加到搜索目录，而是将它们放在我的项目目录中。我对这个错误感到困惑，因为库的名称是 libcurl.lib，而不是curl.lib。对发生的事情有什么想法吗？

编辑：对所有编辑感到抱歉，我只是想提一下，我将 libcurl.lib 添加到了链接库中。

更新

现在我已将 -lcurl 添加到“其他链接选项”框中，错误已更改为

ld.exe cannot find -lcurl

没有 .lib 部分。

原文

(I spotted a question similar to this, but it was 2 years old.)

I'm developing a Windows Form Application in Visual C++ 2008, which uses the FTP feature of libCurl. Although I've added the lib and include directories to the include and library search paths, added libcurl_imp.lib to Additional Dependencies and added CURL_STATICLIB to the Preproccessor Definitions, I get 14 linker errors when I build it. I checked the cURL FAQ and Google'd some of the errors, but I've yet to find a solution. The linker errors are as follows:

1>-------.obj : error LNK2031: unable to generate p/invoke for "extern "C" void __clrcall curl_easy_cleanup(void *)" (?curl_easy_cleanup@@$J0YMXPAX@Z); calling convention missing in metadata
1>-------.obj : error LNK2031: unable to generate p/invoke for "extern "C" enum CURLcode __clrcall curl_easy_perform(void *)" (?curl_easy_perform@@$J0YM?AW4CURLcode@@PAX@Z); calling convention missing in metadata
1>-------.obj : error LNK2031: unable to generate p/invoke for "extern "C" enum CURLcode __clrcall curl_easy_setopt(void *,enum CURLoption,...)" (?curl_easy_setopt@@$J0YM?AW4CURLcode@@PAXW4CURLoption@@ZZ); calling convention missing in metadata
1>-------.obj : error LNK2031: unable to generate p/invoke for "extern "C" void * __clrcall curl_easy_init(void)" (?curl_easy_init@@$J0YMPAXXZ); calling convention missing in metadata
1>-------.obj : error LNK2028: unresolved token (0A00000E) "extern "C" void __clrcall curl_easy_cleanup(void *)" (?curl_easy_cleanup@@$J0YMXPAX@Z) referenced in function "int __clrcall main(cli::array<class System::String ^ >^)" (?main@@$HYMHP$01AP$AAVString@System@@@Z)
1>-------.obj : error LNK2028: unresolved token (0A00000F) "extern "C" enum CURLcode __clrcall curl_easy_perform(void *)" (?curl_easy_perform@@$J0YM?AW4CURLcode@@PAX@Z) referenced in function "int __clrcall main(cli::array<class System::String ^ >^)" (?main@@$HYMHP$01AP$AAVString@System@@@Z)
1>-------.obj : error LNK2020: unresolved token (0A000010) "extern "C" enum CURLcode __clrcall curl_easy_setopt(void *,enum CURLoption,...)" (?curl_easy_setopt@@$J0YM?AW4CURLcode@@PAXW4CURLoption@@ZZ)
1>-------.obj : error LNK2020: unresolved token (0A000011) "extern "C" enum CURLcode __clrcall curl_easy_setopt(void *,enum CURLoption,...)" (?curl_easy_setopt@@$J0YM?AW4CURLcode@@PAXW4CURLoption@@ZZ)
1>-------.obj : error LNK2028: unresolved token (0A000012) "extern "C" void * __clrcall curl_easy_init(void)" (?curl_easy_init@@$J0YMPAXXZ) referenced in function "int __clrcall main(cli::array<class System::String ^ >^)" (?main@@$HYMHP$01AP$AAVString@System@@@Z)
1>-------.obj : error LNK2019: unresolved external symbol "extern "C" void __clrcall curl_easy_cleanup(void *)" (?curl_easy_cleanup@@$J0YMXPAX@Z) referenced in function "int __clrcall main(cli::array<class System::String ^ >^)" (?main@@$HYMHP$01AP$AAVString@System@@@Z)
1>-------.obj : error LNK2019: unresolved external symbol "extern "C" enum CURLcode __clrcall curl_easy_perform(void *)" (?curl_easy_perform@@$J0YM?AW4CURLcode@@PAX@Z) referenced in function "int __clrcall main(cli::array<class System::String ^ >^)" (?main@@$HYMHP$01AP$AAVString@System@@@Z)
1>-------.obj : error LNK2001: unresolved external symbol "extern "C" enum CURLcode __clrcall curl_easy_setopt(void *,enum CURLoption,...)" (?curl_easy_setopt@@$J0YM?AW4CURLcode@@PAXW4CURLoption@@ZZ)
1>-------.obj : error LNK2019: unresolved external symbol "extern "C" void * __clrcall curl_easy_init(void)" (?curl_easy_init@@$J0YMPAXXZ) referenced in function "int __clrcall main(cli::array<class System::String ^ >^)" (?main@@$HYMHP$01AP$AAVString@System@@@Z)

(I blanked out the project name.)

What's causing this, how can I prevent it? Thanks :)

UPDATE

I've switched to Code::Blocks and now its a native Win32 GUI App. I don't get all those linker errors, but I do get something:

ld.exe cannot find -lcurl.lib

Instead of adding the include and lib directories to the search directories, I just put them in my project directory. I am confused by this error because the name of the lib is libcurl.lib, and not curl.lib. Any ideas on what has happened?

EDIT: sorry for all the edits, I just wanted to mention that I added libcurl.lib to the Link Libraries.

UPDATE

Now I've added -lcurl to the Other Link Options box, the error has changed to