why imgui showing linking error

[neko-san12XX]

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(you may also go to Demo>About Window, and click "Config/Build Information" to obtain a bunch of detailed information that you can paste here)

Version/Branch of Dear ImGui:

Version: XXX
Branch: XXX (master/viewport/docking/etc.)

Back-end/Renderer/Compiler/OS

Back-ends: imgui_impl_XXX.cpp + imgui_impl_XXX.cpp (or specify if using a custom engine/back-end)
Compiler: XXX (if the question is related to building or platform specific features)
Operating System: XXX

My Issue/Question:

XXX (please provide as much context as possible)

Screenshots/Video

XXX (you can drag files here)

Standalone, minimal, complete and verifiable example: (see #2261)

// Here's some code anyone can copy and paste to reproduce your issue
ImGui::Begin("Example Bug");
MoreCodeToExplainMyIssue();
ImGui::End();

[neko-san12XX]

i included imgui for opengl. everything looks fine but for some reason, it is showing linking error. why?

[ocornut]

Hello,
You aren't going to get help if you don't provide more details..

[pvince999]

Problem linking imgui (with GLAD ?).

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[100%] Linking CXX executable Imgui1/Imgui1
Undefined symbols for architecture x86_64:
"ImFontAtlas::AddFontFromFileTTF(char const*, float, ImFontConfig const*, unsigned short const*)", referenced from:
_main in main.cpp.o
"ImFontAtlas::GetTexDataAsRGBA32(unsigned char**, int*, int*, int*)", referenced from:
_main in main.cpp.o
"ImFontConfig::ImFontConfig()", referenced from:
_main in main.cpp.o
"ImGui::GetDrawData()", referenced from:
_main in main.cpp.o
"ImGui::CreateContext(ImFontAtlas*)", referenced from:
_main in main.cpp.o
"ImGui::DestroyContext(ImGuiContext*)", referenced from:
_main in main.cpp.o
"ImGui::ShowDemoWindow(bool*)", referenced from:
_main in main.cpp.o
"ImGui::GetIO()", referenced from:
_main in main.cpp.o
mouse_callback(GLFWwindow*, double, double) in main.cpp.o
mouseButtonCallback(GLFWwindow*, int, int, int) in main.cpp.o
"ImGui::Render()", referenced from:
_main in main.cpp.o
"ImGui::NewFrame()", referenced from:
_main in main.cpp.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1

If you need more info, please shout.

[ocornut]

You are not linking with compiled imgui files. Add them to your project.

[pvince999]

Thank you!
Ignorance on my part.

[ocornut]

It’s among the most common issue learning C++ users are having with librairies, mistaking includes with object files. Once you understand your build process it’ll become mostly a non-issue :)