kernel: init: move C++ initialization before application init loop

C++ is documented to be supported in applications, so it should be
supported in SYS_INIT() functions run at the application init level.

Signed-off-by: Peter Bigot <[email protected]>

Author: pabigot

kernel/init.c

@@ -233,9 +233,6 @@ static void bg_thread_main(void *unused1, void *unused2, void *unused3)
 #endif
 #endif
 
-	/* Final init level before app starts */
-	z_sys_init_run_level(_SYS_INIT_LEVEL_APPLICATION);
-
 #ifdef CONFIG_CPLUSPLUS
 	/* Process the .ctors and .init_array sections */
 	extern void __do_global_ctors_aux(void);
@@ -244,6 +241,9 @@ static void bg_thread_main(void *unused1, void *unused2, void *unused3)
 	__do_init_array_aux();
 #endif
 
+	/* Final init level before app starts */
+	z_sys_init_run_level(_SYS_INIT_LEVEL_APPLICATION);
+
 	z_init_static_threads();
 
 #ifdef CONFIG_SMP