How can I include libcurl correctly using GCC (on Windows)?

Question

I'm getting a linker error whenever I #include in my program. I have downloaded libcurl from haxx.se, compiled libcurl.dll, and added -Icurl to my GCC options when compiling (as well as tried adding a direct path using -L to the dll). However, I still get the following errors:

undefined reference to `_imp__curl_easy_init'
undefined reference to `_imp__curl_easy_setopt'
undefined reference to `_imp__curl_easy_setopt'
undefined reference to `_imp__curl_easy_perform'
undefined reference to `_imp__curl_easy_strerror'
undefined reference to `_imp__curl_easy_cleanup'

My compile command includes this:

-Icurl -L"F:/GCCnew/lib/libcurl.dll"

What am I doing wrong? I suspect it's something simple but I can't work it out and searching hasn't given me a solution that doesn't use something like Code::blocks.

hello there, running into similar issues. did you ever manage to find a solution? — Clyme
– Clyme, Commented Sep 30, 2020 at 15:50
@Clyme sorry, it's been quite a long time since I posted this and I do not remember! — Birdie
– Birdie, Commented Oct 5, 2020 at 0:37

Community · Accepted Answer · 2020-06-20 09:12:55Z

1

My compile command includes this:

-Icurl -L"F:/GCCnew/lib/libcurl.dll"

If you use mingw gcc, then:

First, -L must have a folder name, not a library name.
Second, there must be '-l' option. For example -lcurl.
Third, -Icurl is irrelevant to your linker error

So the command to build might look like:

gcc your-file.c -o executable_name -L"F:/GCCnew/lib" -lcurl

Useful links:

http://www.mingw.org/wiki/sampleDLL (Building a client executable)
http://www.mingw.org/wiki/Specify_the_libraries_for_the_linker_to_use
http://www.mingw.org/wiki/LibraryPathHOWTO

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Jun 4, 2014 at 6:39

user184968

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2 Comments

Birdie Over a year ago

Unfortunately that didn't work. I've also tried placing libcurl.a, libcurldll.a, and libcurl.dll in the same directory as the file I'm compiling and using -L. -lcurl as options, but that also didn't work.

Chintan Pathak Over a year ago

@Birdie: were u able to solve this?

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