failure to compile imgui glfw opengl on linux with gcc 11 2

Question

I've recently started coding with c++ and the project that im currently on requires imgui. so i set up the .h and .cpp libraries in a folder called "include" in the same folder as the source code. I'm currently trying to run the CPP in https://github.com/ocornut/imgui/tree/master/examples/example_glfw_opengl3 and compile it with GCC using GCC imgui.cpp -lstdc++ -lglfw -lGL -limgui but i just get

/usr/bin/ld: cannot find -limgui collect2: error: ld returned 1 exit status

yes I know there is a make file in the link but I'm using the file in another folder.