Skip imgui when LIBRETRO is enabled

CMakeLists.txt

@@ -938,7 +938,11 @@ if(IOS)
 	target_compile_definitions(Common PUBLIC GLES_SILENCE_DEPRECATION)
 endif()
 
-target_link_libraries(Common Ext::Snappy cpu_features imgui)
+target_link_libraries(Common Ext::Snappy cpu_features)
+
+if(NOT LIBRETRO)
+    target_link_libraries(Common imgui)
+endif()
 
 if(ARM64)
 	if(ANDROID)

ext/CMakeLists.txt

@@ -30,11 +30,13 @@ add_subdirectory(glslang EXCLUDE_FROM_ALL)
 add_subdirectory(snappy)
 add_subdirectory(lua-build)
 add_subdirectory(minimp3)
-add_subdirectory(imgui)
 add_subdirectory(at3_standalone)
 add_subdirectory(udis86)
 add_subdirectory(SPIRV-Cross-build)
 add_subdirectory(rcheevos-build)
+if(NOT LIBRETRO)
+    add_subdirectory(imgui)
+endif()
 if(NOT HTTPS_NOT_AVAILABLE)
 	add_subdirectory(naett-build)
 endif()