How to use SDL2/3 backend with cmake `FetchContent`

[TakWolf]

FetchContent_Declare(SDL2
        GIT_REPOSITORY https://github.com/libsdl-org/SDL.git
        GIT_TAG release-2.28.5
)
FetchContent_MakeAvailable(SDL2)

FetchContent_Declare(TGUI
        GIT_REPOSITORY https://github.com/texus/TGUI.git
        GIT_TAG v1.1.0
)
set(TGUI_BACKEND SDL_OPENGL3)
FetchContent_MakeAvailable(TGUI)

...

target_link_libraries(${PROJECT_NAME} PRIVATE SDL2main SDL2-static)
target_link_libraries(${PROJECT_NAME} PRIVATE tgui)

-- If something was not detected, although the libraries
-- were installed, then make sure you have set the
-- CFLAGS and LDFLAGS environment variables correctly.
-- 
-- Activating backend SDL_OPENGL3 (TGUI/Backend/SDL-OpenGL3.hpp)
-- Configuring done (0.7s)
CMake Error: install(EXPORT "TGUIConfigExport" ...) includes target "tgui" which requires target "SDL2-static" that is not in any export set.
CMake Error in cmake-build-debug/_deps/tgui-src/src/CMakeLists.txt:
  export called with target "tgui" which requires target "SDL2-static" that
  is not in any export set.

-- Generating done (0.0s)
CMake Generate step failed.  Build files cannot be regenerated correctly.

For each SFML + TGUI or SDL2 only by using FetchContent all running well.

But use SDL_OPENGL3 / SDL_RENDERER will lead to the above errors.

[texus]

Can you try with the latest commit of the 1.x branch instead of the 1.1.0 tag? This should have been fixed already, but only recently (after the 1.1 release).

[TakWolf]

I changed it to the following version and it can be run. thanks!

FetchContent_Declare(TGUI
        GIT_REPOSITORY https://github.com/texus/TGUI.git
        GIT_TAG nightly_build
)