make unified build work on windows

CMakeLists.txt

@@ -84,7 +84,6 @@ set(TWN_THIRD_PARTY_SOURCE_FILES
 
 set(TWN_NONOPT_SOURCE_FILES
         src/twn_stb.c
-        src/twn_main.c
 
         src/twn_context.c       include/twn_context.h
         src/twn_audio.c         include/twn_audio.h
@@ -275,6 +274,7 @@ endfunction()
 function(link_deps target)
         target_link_libraries(${target} PUBLIC
                                         $<$<NOT:$<BOOL:${EMSCRIPTEN}>>:SDL2::SDL2>
+                                        $<$<NOT:$<BOOL:${TWN_FEATURE_DYNLIB_GAME}>>:SDL2::SDL2main>
                                         physfs-static
                                         xms)
 	target_include_directories(${target} PUBLIC ${SDL2_INCLUDE_DIRS})
@@ -289,7 +289,7 @@ function(use_townengine sources output_directory)
                 add_library(${target}_game SHARED ${sources})
                 give_options(${target}_game)
                 include_deps(${target}_game)
-                target_link_libraries(${target}_game PUBLIC $<$<NOT:$<BOOL:${EMSCRIPTEN}>>:SDL2::SDL2> ${TWN_TARGET})
+                target_link_libraries(${target}_game PUBLIC ${TWN_TARGET})
                 set_target_properties(${target}_game PROPERTIES
                                                      OUTPUT_NAME game
                                                      LIBRARY_OUTPUT_DIRECTORY ${output_directory}