Merge pull request #4704 from flysand7/4614-thread-locals

Error if `-no-crt` is used without `-no-thread-locals`

src/build_settings.cpp

@@ -2124,6 +2124,7 @@ gb_internal bool init_build_paths(String init_filename) {
 		}
 	}
 
+	bool no_crt_checks_failed = false;
 	if (build_context.no_crt && !build_context.ODIN_DEFAULT_TO_NIL_ALLOCATOR && !build_context.ODIN_DEFAULT_TO_PANIC_ALLOCATOR) {
 		switch (build_context.metrics.os) {
 		case TargetOs_linux:
@@ -2133,11 +2134,29 @@ gb_internal bool init_build_paths(String init_filename) {
 		case TargetOs_openbsd:
 		case TargetOs_netbsd:
 		case TargetOs_haiku:
-			gb_printf_err("-no-crt on unix systems requires either -default-to-nil-allocator or -default-to-panic-allocator to also be present because the default allocator requires crt\n");
-			return false;
+			gb_printf_err("-no-crt on Unix systems requires either -default-to-nil-allocator or -default-to-panic-allocator to also be present, because the default allocator requires CRT\n");
+			no_crt_checks_failed = true;
 		}
 	}
 
+	if (build_context.no_crt && !build_context.no_thread_local) {
+		switch (build_context.metrics.os) {
+		case TargetOs_linux:
+		case TargetOs_darwin:
+		case TargetOs_essence:
+		case TargetOs_freebsd:
+		case TargetOs_openbsd:
+		case TargetOs_netbsd:
+		case TargetOs_haiku:
+			gb_printf_err("-no-crt on Unix systems requires the -no-thread-local flag to also be present, because the TLS is inaccessible without CRT\n");
+			no_crt_checks_failed = true;
+		}
+	}
+
+	if (no_crt_checks_failed) {
+		return false;
+	}
+
 	return true;
 }
 

src/check_expr.cpp

@@ -1044,7 +1044,7 @@ gb_internal AstPackage *get_package_of_type(Type *type) {
 }
 
 
-// NOTE(bill): 'content_name' is for debugging and error messages
+// NOTE(bill): 'context_name' is for debugging and error messages
 gb_internal void check_assignment(CheckerContext *c, Operand *operand, Type *type, String context_name) {
 	check_not_tuple(c, operand);
 	if (operand->mode == Addressing_Invalid) {

src/main.cpp

@@ -2334,6 +2334,10 @@ gb_internal void print_show_help(String const arg0, String command, String optio
 			print_usage_line(2, "Sets the default allocator to be the nil_allocator, an allocator which does nothing.");
 		}
 
+		if (print_flag("-default-to-panic-allocator")) {
+			print_usage_line(2, "Sets the default allocator to be the panic_allocator, an allocator which calls panic() on any allocation attempt.");
+		}
+
 		if (print_flag("-define:<name>=<value>")) {
 			print_usage_line(2, "Defines a scalar boolean, integer or string as global constant.");
 			print_usage_line(2, "Example: -define:SPAM=123");