Linking a curl static lib using cmake at Clion Windows

Question

I'm noob at C and cmake and experience difficulties with a lib linkage. I have the following cmake:

cmake_minimum_required(VERSION 3.10)
project(EC C)

set(CMAKE_C_STANDARD 11)

add_executable(EC main.c)

set(CURL_INCLUDE_DIR C:/curl-8.14.1_1-win64-mingw/include)
set(CURL_LIBRARY C:/curl-8.14.1_1-win64-mingw/lib/libcurl.a)

find_package(CURL REQUIRED)
if(CURL_FOUND)
    message(STATUS "libcurl found")
    include_directories(${CURL_INCLUDE_DIRS})
    target_link_libraries(EC CURL::libcurl)
else()
    message(FATAL_ERROR "libcurl not found")
endif()

While building I receive like this:

C:/Users/DELL/CLionProjects/EC/main.c:22:(.text+0x118): undefined reference to `__imp_curl_easy_init'

As I understood I have a problem with static lib linkage, but can't find workable solution for me. How can I define what a lib is not linked and how to link it?

P.S. I've add add_compile_definitions(CURL_STATICLIB) to the end of cmake as n. m. could be an AI suggests, but get then new warnings like:

undefined reference to `__imp_closesocket`

You must have CURL_STATICLIB preprocessor macro defined. You can add it by adding add_compile_definitions(CURL_STATICLIB) to CMakeLists.txt. — n. m. could be an AI
– n. m. could be an AI, Commented Jun 11 at 19:17
This question is similar to: Unresolved symbols when linking a program using libcurl. If you believe it’s different, please edit the question, make it clear how it’s different and/or how the answers on that question are not helpful for your problem. — 3CEZVQ
– 3CEZVQ, Commented Jun 12 at 2:11
@n. m. could be an AI thank you for the tip, but I get then many errors likeC:/curl-8.14.1_1-win64-mingw/lib/libcurl.a(unity_0_c.c.obj):unity_0_c.c:(.text$async_thrdd_destroy[async_thrdd_destroy]+0x13e): undefined reference to __imp_closesocket'` — Mik
– Mik, Commented Jun 12 at 8:48
You will need to add other libraries, like ws2_32 or wsock32 (where the socket functions are), and then probably some more (for encryption and whatnot). — n. m. could be an AI
– n. m. could be an AI, Commented Jun 12 at 9:50
"how can I define" By looking it up. I don't know of a better way. "should i link the lib to the project or lib to lib" You can link a DLL or an executable, but not a static library. — n. m. could be an AI
– n. m. could be an AI, Commented Jun 12 at 10:43

Rezaebumbum Lemo · Accepted Answer · 2025-06-20 04:56:14Z

0

Try Install mingw64 or mingw32. And Use The Compiler Why? Because curl That You Using Is Compiled Using mingw Compiler.

edited Jun 20 at 4:56

answered Jun 20 at 4:40

Rezaebumbum Lemo

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6 Comments

Nanigashi Jun 20 at 5:01

Can you verify that those products contain the necessary library?

Rezaebumbum Lemo Jun 20 at 5:04

Yes Like Win32 and other That Only Exsist On Windows.

Nanigashi Jun 20 at 5:09

The issue is to document specifically the __imp_closesocket interface.

Rezaebumbum Lemo Jun 20 at 5:20

__imp_closesocket is part of winsocket Api and the function use this is closesocket function that return int WSAAPI

Nanigashi Jun 20 at 5:23

So that should be your answer rather than what you have now.

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