[Kernel] Fix the system initialization link issue

include/components.h

+/*
+ * File      : components.h
+ *             header for RT-Thread components
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2012-2015, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2012-09-20     Bernard      Change the name to components.h
+ *                             And all components related header files.
+ * 2015-02-06     Bernard      Rename the components.h to rtcom.h
+ * 2015-03-22     Bernard      Keep the compatibility.
+ */
+
+#ifndef COMPONENTS_H__
+#define COMPONENTS_H__
+
+#ifdef RT_USING_FINSH
+#include <finsh.h>
+#include <shell.h>
+#endif
+
+#ifdef RT_USING_LWIP
+#include <lwip/sys.h>
+#include <netif/ethernetif.h>
+#endif
+
+#ifdef RT_USING_DFS
+#include <dfs_init.h>
+#include <dfs_fs.h>
+#ifdef RT_USING_DFS_ELMFAT
+#include <dfs_elm.h>
+#endif
+#if defined(RT_USING_LWIP) && defined(RT_USING_DFS_NFS)
+#include <dfs_nfs.h>
+#endif
+#ifdef RT_USING_DFS_ROMFS
+#include <dfs_romfs.h>
+#endif
+#ifdef RT_USING_DFS_DEVFS
+#include <devfs.h>
+#endif
+#ifdef RT_USING_DFS_UFFS
+#include <dfs_uffs.h>
+#endif
+#ifdef RT_USING_DFS_JFFS2
+#include <dfs_jffs2.h>
+#endif
+#ifdef RT_USING_DFS_YAFFS2
+#include <dfs_yaffs2.h>
+#endif
+#ifdef RT_USING_DFS_ROMFS
+#include <dfs_romfs.h>
+#endif
+#endif
+
+#ifdef RT_USING_PTHREADS
+#include <pthread.h>
+#endif
+
+#ifdef RT_USING_MODULE
+#include <rtm.h>
+#endif
+
+#endif

include/rtthread.h

@@ -437,6 +437,11 @@ void rt_module_unload_sethook(void (*hook)(rt_module_t module));
 void rt_module_init_object_container(struct rt_module *module);
 rt_err_t rt_module_destroy(rt_module_t module);
 
+/*
+ * application module system initialization
+ */
+int rt_system_module_init(void);
+
 /*@}*/
 #endif
 
@@ -455,10 +460,10 @@ void rt_interrupt_leave(void);
  */
 rt_uint8_t rt_interrupt_get_nest(void);
 
-/**
- * application module
- */
-int rt_system_module_init(void);
+#ifdef RT_USING_COMPONENTS_INIT
+void rt_components_init(void);
+void rt_components_board_init(void);
+#endif
 
 /**
  * @addtogroup KernelService

src/SConscript

@@ -5,8 +5,13 @@ from building import *
 src = Glob('*.c')
 
 CPPPATH = [RTT_ROOT + '/include']
-if rtconfig.CROSS_TOOL == 'keil' and GetDepend('RT_USING_MODULE') == True:
-    LINKFLAGS = ' --keep __rtmsym_* '
+if rtconfig.CROSS_TOOL == 'keil':
+    # add more link flags for module and components_init.
+    LINKFLAGS = ''
+    if GetDepend('RT_USING_MODULE'):
+        LINKFLAGS = ' --keep __rtmsym_* '
+    if GetDepend('RT_USING_COMPONENTS_INIT'):
+        LINKFLAGS = ' --keep __rt_init* '
 else:
     LINKFLAGS = ''