-added '-pthread' to arguments in 'meson.build' for GDC

meson.build

@@ -58,6 +58,11 @@ if betterC_opt
 	endif
 endif
 
+if comp_id == 'gcc'
+	args+='-pthread'
+	link_args+='-pthread'
+endif
+
 add_global_arguments(args, language : 'd')
 add_global_link_arguments(link_args, language : 'd')
 

source/bubel/ecs/manager.d

@@ -3233,15 +3233,8 @@ export struct EntityManager
     {
         export void update() nothrow @nogc
         {
-            //(cast(SytemFuncType) system.m_update)(this);
             if(!system.m_empty)
             {
-                // Sys* s = cast(Sys*) system.m_system_pointer;
-
-                //Sys.EntitiesData input_data;
-                // EntityInfo* info = info; //block.type_info;
-                // System* system = system;
-
                 EntitiesBlock* block;
                 if (first_block)
                     block = first_block;