do not build sdl2 for ui-wasm

src/ui/CMakeLists.txt

@@ -46,6 +46,7 @@ if(EMSCRIPTEN)
     -Wformat
     -Os
     -fwasm-exceptions
+    "SHELL:-s USE_SDL=2"
     -pthread)
 
   add_link_options(
@@ -57,6 +58,7 @@ if(EMSCRIPTEN)
     --shell-file
     ${CMAKE_CURRENT_SOURCE_DIR}/shell_minimal.html
     "SHELL:-s PTHREAD_POOL_SIZE=30"
+    "SHELL:-s USE_SDL=2"
     -fwasm-exceptions
     -pthread
     -sFETCH)
@@ -109,7 +111,6 @@ if(EMSCRIPTEN)
     ${outputFileName}
     PRIVATE implot
             function2::function2
-            SDL2::SDL2
             plf_colony
             app_header
             utils
@@ -181,5 +182,4 @@ target_link_libraries(
   remotesignalsources_test
   PRIVATE client
           services
-          imgui
-          SDL2::SDL2)
+          imgui)

src/ui/cmake/Dependencies.cmake

@@ -54,21 +54,20 @@ FetchContent_Declare(
 
 FetchContent_MakeAvailable(imgui implot imgui-node-editor yaml-cpp stb opencmw-cpp plf_colony function2)
 
+if (NOT EMSCRIPTEN)
 FetchContent_Declare(
         sdl2
         OVERRIDE_FIND_PACKAGE
         GIT_REPOSITORY "https://github.com/libsdl-org/SDL"
         GIT_TAG        release-2.28.2
 )
-
-if (EMSCRIPTEN)
-    set(sdl2_SDL_ATOMIC ON CACHE INTERNAL "ON")
-endif()
-
 FetchContent_MakeAvailable(sdl2)
 
 find_package(SDL2 REQUIRED)
 find_package(OpenGL REQUIRED COMPONENTS OpenGL)
+
+endif()
+
 # imgui and implot are not CMake Projects, so we have to define their targets manually here
 add_library(
     imgui
@@ -84,8 +83,6 @@ add_library(
 )
 if(NOT EMSCRIPTEN) # emscripten comes with its own sdl, for native we have to specify the dependency
     target_link_libraries(imgui PUBLIC SDL2::SDL2  OpenGL::GL)
-else()
-    target_link_libraries(imgui PUBLIC  SDL2::SDL2 )
 endif()
 
 target_include_directories(