Dependency issues linking ImGui, SDL2 to project using CMake - cmake

Question

Im having trouble changing my project from Sfml to SDL2+opengl3 rendering. The error im getting with my current CMake setup is ImGui not linking to a subfolder of mine in which i create a SHARED library: UserInterface.
Now i have tried declaring UserInterface a dependency of ImGui library:
(target_link_libraries(UserInterface imgui))
and without it.
I get a few different errors depending on how i set up CMake, but all of them must be wrong:
Without the line i get a bunch of undefined references:
/usr/bin/ld: UserInterface/libUserInterface.so: undefined reference to `ImGui_ImplOpenGL3_Init(char const*)'
/usr/bin/ld: UserInterface/libUserInterface.so: undefined reference to `ImGui::ShowDemoWindow(bool*)'
With that line i get:
/usr/bin/ld: ../libimgui.a(imgui_demo.cpp.o): relocation R_X86_64_PC32 against symbol `GImGuiDemoMarkerCallback' can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: final link failed: bad value
If i then change my UserInterface, and imgui to STATIC libraries i get this error:
/usr/bin/ld: libimgui.a(imgui_impl_opengl3.cpp.o): undefined reference to symbol 'dlclose##GLIBC_2.2.5'
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/libdl.so: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
Just to clarify, all these are linking errors when linking CXX executable digitus,
which is my application.
project:
build
CMakeLists.txt
src (folder)
CMakeLists.txt
main.cpp
(all required imgui files)
UserInterface (folder)
CMakeLists.txt
[...]
Action (folder)
[...]
My topmost CMakeLists.txt:
cmake_minimum_required(VERSION 3.20)
set (CMAKE_CXX_STANDARD 17)
project(digitus)
set(CMAKE_MODULE_PATH "/usr/local/lib/cmake") # tell cmake where to find find.cmake and config.cmake files
find_package(OpenGL REQUIRED)
find_package(SDL2 REQUIRED)
find_package(GLEW REQUIRED)
find_package(glm REQUIRED)
#include_directories(${SDL2_INCLUDE_DIR}) # add sdl2's include dir
add_subdirectory(src)
This is my CMakeLists.txt inside the src folder:
SET(SOURCES
main.cpp
ApplicationManager.cpp
ApplicationManager.h
[...]
)
SET( IMGUISOURCE
imconfig.h
imgui_demo.cpp
imgui_draw.cpp
imgui_impl_opengl3_loader.h
imgui_impl_opengl3.cpp
imgui_impl_opengl3.h
imgui_impl_sdl.cpp
imgui_impl_sdl.h
imgui_internal.h
imgui_tables.cpp
imgui_widgets.cpp
imgui.cpp
imgui.h
)
add_executable(digitus ${SOURCES})
target_link_libraries(digitus glm::glm )
target_link_libraries(digitus ${CMAKE_DL_LIBS})
add_library(imgui ${IMGUISOURCE})
target_link_libraries(digitus imgui)
add_subdirectory(Action)
add_subdirectory(UserInterface)
#target_link_libraries(UserInterface imgui)
target_link_libraries(digitus UserInterface)
target_link_libraries(digitus Action)
target_link_libraries(digitus SDL2)
target_link_libraries(digitus GLEW::glew)
target_link_libraries(digitus OpenGL::GL )
The CMakeLists.txt inside UserInterface:
Set(USERINTERFACESOURCE
UserInterface.h
UserInterface.cpp
CircuitWindow.h
CircuitWindow.cpp
)
add_library(UserInterface STATIC ${USERINTERFACESOURCE})