Add configurable application entry point

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@5070 7fd9a85b-ad96-42d3-883c-3090e2eb8679

nuttx/sched/Kconfig

@@ -202,6 +202,14 @@ config SCHED_ONEXIT_MAX
 		is supported. That number can be increased by defined this setting to the
 		number that you require.
 
+config USER_ENTRYPOINT
+	string "Appliation entry point"
+	default "user_start"
+	---help---
+		The name of the entry point for user applications.  For the example
+		applications this is of the form 'app_main' where 'app' is the application
+		name. If not defined, USER_ENTRYPOINT defaults to "user_start."
+
 config DISABLE_OS_API
 	bool "Disable NuttX interfaces"
 	default y

nuttx/sched/os_bringup.c

@@ -71,12 +71,6 @@
  * then the default entry point is user_start.
  */
 
-#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_USER_ENTRYPOINT)
-#  define USER_ENTRYPOINT (main_t)CONFIG_USER_ENTRYPOINT
-#else
-#  define USER_ENTRYPOINT user_start
-#endif
-
 /****************************************************************************
  * Private Types
  ****************************************************************************/
@@ -175,11 +169,11 @@ int os_bringup(void)
   
   init_taskid = exec_namedapp(CONFIG_BUILTIN_APP_START, argv);
 #else
-  /* Start the default application at USER_ENTRYPOINT() */
+  /* Start the default application at CONFIG_USER_ENTRYPOINT() */
 
   init_taskid = TASK_CREATE("init", SCHED_PRIORITY_DEFAULT,
                             CONFIG_USERMAIN_STACKSIZE,
-                            (main_t)USER_ENTRYPOINT, (const char **)NULL);
+                            (main_t)CONFIG_USER_ENTRYPOINT, (const char **)NULL);
 #endif
   ASSERT(init_taskid != ERROR);
   return OK;