Fix: [CMake] os/windows/openttd.manifest is not a generated file

CMakeLists.txt

@@ -201,6 +201,11 @@ add_executable(openttd WIN32 ${GENERATED_SOURCE_FILES})
 set_target_properties(openttd PROPERTIES OUTPUT_NAME "${BINARY_NAME}")
 # All other files are added via target_sources()
 
+if(MSVC)
+    # Add DPI manifest to project; other WIN32 targets get this via ottdres.rc
+    target_sources(openttd PRIVATE "${CMAKE_SOURCE_DIR}/os/windows/openttd.manifest")
+endif()
+
 add_subdirectory(${CMAKE_SOURCE_DIR}/src)
 add_subdirectory(${CMAKE_SOURCE_DIR}/media/baseset)
 

cmake/CompileFlags.cmake

@@ -27,9 +27,6 @@ macro(compile_flags)
             # Enable multi-threaded compilation.
             add_compile_options(/MP)
         endif()
-
-        # Add DPI manifest to project; other WIN32 targets get this via ottdres.rc
-        list(APPEND GENERATED_SOURCE_FILES "${CMAKE_SOURCE_DIR}/os/windows/openttd.manifest")
     endif()
 
     # Add some -D flags for Debug builds. We cannot use add_definitions(), because