Make `-threaded-checker` the default not (opt out with `-no-threaded-checker`)

src/build_settings.cpp

@@ -298,7 +298,7 @@ struct BuildContext {
 	bool   linker_map_file;
 
 	bool   use_separate_modules;
-	bool   threaded_checker;
+	bool   no_threaded_checker;
 
 	bool   show_debug_messages;
 	

src/checker.cpp

@@ -5339,7 +5339,7 @@ gb_internal void check_procedure_bodies(Checker *c) {
 	GB_ASSERT(c != nullptr);
 
 	u32 thread_count = cast(u32)global_thread_pool.threads.count;
-	if (!build_context.threaded_checker) {
+	if (build_context.no_threaded_checker) {
 		thread_count = 1;
 	}
 

src/main.cpp

@@ -617,7 +617,6 @@ enum BuildFlagKind {
 	BuildFlag_NoEntryPoint,
 	BuildFlag_UseLLD,
 	BuildFlag_UseSeparateModules,
-	BuildFlag_ThreadedChecker,
 	BuildFlag_NoThreadedChecker,
 	BuildFlag_ShowDebugMessages,
 	BuildFlag_Vet,
@@ -793,7 +792,6 @@ gb_internal bool parse_build_flags(Array<String> args) {
 	add_flag(&build_flags, BuildFlag_NoEntryPoint,            str_lit("no-entry-point"),            BuildFlagParam_None,    Command__does_check &~ Command_test);
 	add_flag(&build_flags, BuildFlag_UseLLD,                  str_lit("lld"),                       BuildFlagParam_None,    Command__does_build);
 	add_flag(&build_flags, BuildFlag_UseSeparateModules,      str_lit("use-separate-modules"),      BuildFlagParam_None,    Command__does_build);
-	add_flag(&build_flags, BuildFlag_ThreadedChecker,         str_lit("threaded-checker"),          BuildFlagParam_None,    Command__does_check);
 	add_flag(&build_flags, BuildFlag_NoThreadedChecker,       str_lit("no-threaded-checker"),       BuildFlagParam_None,    Command__does_check);
 	add_flag(&build_flags, BuildFlag_ShowDebugMessages,       str_lit("show-debug-messages"),       BuildFlagParam_None,    Command_all);
 	add_flag(&build_flags, BuildFlag_Vet,                     str_lit("vet"),                       BuildFlagParam_None,    Command__does_check);
@@ -1311,20 +1309,8 @@ gb_internal bool parse_build_flags(Array<String> args) {
 						case BuildFlag_UseSeparateModules:
 							build_context.use_separate_modules = true;
 							break;
-						case BuildFlag_ThreadedChecker: {
-							#if defined(DEFAULT_TO_THREADED_CHECKER)
-							gb_printf_err("-threaded-checker is the default on this platform\n");
-							bad_flags = true;
-							#endif
-							build_context.threaded_checker = true;
-							break;
-						}
 						case BuildFlag_NoThreadedChecker: {
-							#if !defined(DEFAULT_TO_THREADED_CHECKER)
-							gb_printf_err("-no-threaded-checker is the default on this platform\n");
-							bad_flags = true;
-							#endif
-							build_context.threaded_checker = false;
+							build_context.no_threaded_checker = true;
 							break;
 						}
 						case BuildFlag_ShowDebugMessages: