Merge remote-tracking branch 'upstream/master'

# Conflicts:
#	src/thread.c

75 files changed, 580 insertions, 586 deletions

diff --git a/components/libc/compilers/armlibc/dirent.h b/components/libc/compilers/armlibc/dirent.h
index 1adf952031..d3bc58cbc5 100644
--- a/components/libc/compilers/armlibc/dirent.h
+++ b/components/libc/compilers/armlibc/dirent.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef __RTT_DIRENT_H__
 #define __RTT_DIRENT_H__
 
diff --git a/components/libc/compilers/armlibc/fcntl.h b/components/libc/compilers/armlibc/fcntl.h
index 324b73f218..80cf1b4409 100644
--- a/components/libc/compilers/armlibc/fcntl.h
+++ b/components/libc/compilers/armlibc/fcntl.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef FCNTL_H__
 #define FCNTL_H__
 
diff --git a/components/libc/compilers/armlibc/libc.c b/components/libc/compilers/armlibc/libc.c
index c3fab19fdc..fee390d4b4 100644
--- a/components/libc/compilers/armlibc/libc.c
+++ b/components/libc/compilers/armlibc/libc.c
@@ -1,23 +1,7 @@
 /*
- * File     : libc.c
- * Brief    : armcc libc initialization
+ * Copyright (c) 2006-2018, RT-Thread Development Team
  *
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2017, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/armlibc/libc.h b/components/libc/compilers/armlibc/libc.h
index e57897f0a8..158fe06c3e 100644
--- a/components/libc/compilers/armlibc/libc.h
+++ b/components/libc/compilers/armlibc/libc.h
@@ -1,23 +1,7 @@
 /*
- * File     : libc.h
- * Brief    : armcc libc header file
+ * Copyright (c) 2006-2018, RT-Thread Development Team
  *
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2017, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/armlibc/libc_syms.c b/components/libc/compilers/armlibc/libc_syms.c
index fc84aec77a..0e1c42d899 100644
--- a/components/libc/compilers/armlibc/libc_syms.c
+++ b/components/libc/compilers/armlibc/libc_syms.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/components/libc/compilers/armlibc/mem_std.c b/components/libc/compilers/armlibc/mem_std.c
index 7fa0033f9d..e160104a25 100644
--- a/components/libc/compilers/armlibc/mem_std.c
+++ b/components/libc/compilers/armlibc/mem_std.c
@@ -1,13 +1,7 @@
 /*
- * File     : mem_std.c
- * Brief    : implement standard memory routins.
+ * Copyright (c) 2006-2018, RT-Thread Development Team
  *
- * This file is part of Device File System in RT-Thread RTOS
- * COPYRIGHT (C) 2014, RT-Thread Development Team
- *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * 2014-08-03     bernard      Add file header.
@@ -16,22 +10,25 @@
 #include "rtthread.h"
 
 #ifdef RT_USING_HEAP
+
+#ifdef __CC_ARM
 /* avoid the heap and heap-using library functions supplied by arm */
 #pragma import(__use_no_heap)
+#endif
 
-void *malloc(int n)
+void *malloc(size_t n)
 {
     return rt_malloc(n);
 }
 RTM_EXPORT(malloc);
 
-void *realloc(void *rmem, rt_size_t newsize)
+void *realloc(void *rmem, size_t newsize)
 {
     return rt_realloc(rmem, newsize);
 }
 RTM_EXPORT(realloc);
 
-void *calloc(rt_size_t nelem, rt_size_t elsize)
+void *calloc(size_t nelem, size_t elsize)
 {
     return rt_calloc(nelem, elsize);
 }
diff --git a/components/libc/compilers/armlibc/stdio.c b/components/libc/compilers/armlibc/stdio.c
index d1ac976568..5262a4dd92 100644
--- a/components/libc/compilers/armlibc/stdio.c
+++ b/components/libc/compilers/armlibc/stdio.c
@@ -1,23 +1,7 @@
 /*
- * File     : stdio.c
- * Brief    : stdio/console
+ * Copyright (c) 2006-2018, RT-Thread Development Team
  *
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2017, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
@@ -65,11 +49,27 @@ int libc_stdio_get_console(void)
 
 int libc_stdio_read(void *buffer, size_t size)
 {
-    return read(std_fd, buffer, size);
+    if (std_fd >= 0)
+    {
+        return read(std_fd, buffer, size);
+    }
+    else
+    {
+        rt_kprintf("Illegal stdio input!\n");
+        return 0;
+    }
 }
 
 int libc_stdio_write(const void *buffer, size_t size)
 {
-    return write(std_fd, buffer, size);
+    if (std_fd >= 0)
+    {
+        return write(std_fd, buffer, size);
+    }
+    else
+    {
+        rt_kprintf("Illegal stdio output!\n");
+        return size;
+    }
 }
 #endif
diff --git a/components/libc/compilers/armlibc/stubs.c b/components/libc/compilers/armlibc/stubs.c
index b9be260357..6e9f13d143 100644
--- a/components/libc/compilers/armlibc/stubs.c
+++ b/components/libc/compilers/armlibc/stubs.c
@@ -1,23 +1,7 @@
 /*
- * File     : stubs.c
- * Brief    : reimplement some basic functions of arm standard c library
+ * Copyright (c) 2006-2018, RT-Thread Development Team
  *
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2017, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
@@ -37,7 +21,11 @@
 #include "dfs_posix.h"
 #endif
 
+#ifdef __CLANG_ARM
+__asm(".global __use_no_semihosting\n\t");
+#else
 #pragma import(__use_no_semihosting_swi)
+#endif
 
 /* Standard IO device handles. */
 #define STDIN       0
@@ -249,7 +237,7 @@ int _sys_tmpnam(char *name, int fileno, unsigned maxlength)
 char *_sys_command_string(char *cmd, int len)
 {
     /* no support */
-    return cmd;
+    return RT_NULL;
 }
 
 /* This function writes a character to the console. */
@@ -309,17 +297,18 @@ int system(const char *string)
 
 int fputc(int c, FILE *f) 
 {
-    char ch = c;
+    char ch[2] = {0};
 
-    rt_kprintf(&ch);
+    ch[0] = c;
+    rt_kprintf(&ch[0]);
     return 1;
 }
 
 int fgetc(FILE *f) 
 {
+#ifdef RT_USING_POSIX
     char ch;
 
-#ifdef RT_USING_POSIX
     if (libc_stdio_read(&ch, 1) == 1)
         return ch;
 #endif
diff --git a/components/libc/compilers/armlibc/sys/errno.h b/components/libc/compilers/armlibc/sys/errno.h
index 8ee115ed04..9c4307ebfb 100644
--- a/components/libc/compilers/armlibc/sys/errno.h
+++ b/components/libc/compilers/armlibc/sys/errno.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef SYS_ERRNO_H__
 #define SYS_ERRNO_H__
 
diff --git a/components/libc/compilers/armlibc/sys/mman.h b/components/libc/compilers/armlibc/sys/mman.h
index 024a64e911..8c61b32b7c 100644
--- a/components/libc/compilers/armlibc/sys/mman.h
+++ b/components/libc/compilers/armlibc/sys/mman.h
@@ -1,21 +1,7 @@
 /*
- * File      : mman.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2017, RT-Thread Development Team
+ * Copyright (c) 2006-2018, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/armlibc/sys/stat.h b/components/libc/compilers/armlibc/sys/stat.h
index e69de29bb2..ce95230e88 100644
--- a/components/libc/compilers/armlibc/sys/stat.h
+++ b/components/libc/compilers/armlibc/sys/stat.h
@@ -0,0 +1,8 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
diff --git a/components/libc/compilers/armlibc/sys/time.h b/components/libc/compilers/armlibc/sys/time.h
index 2d60b37317..bac122e183 100644
--- a/components/libc/compilers/armlibc/sys/time.h
+++ b/components/libc/compilers/armlibc/sys/time.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef _SYS_TIME_H_
 #define _SYS_TIME_H_
 
@@ -37,6 +45,7 @@ struct timezone {
 };
 
 int gettimeofday(struct timeval *tp, void *ignore);
+struct tm *gmtime_r(const time_t *timep, struct tm *r);
 
 #ifdef __cplusplus
 }
diff --git a/components/libc/compilers/armlibc/sys/types.h b/components/libc/compilers/armlibc/sys/types.h
index b01d8283d4..4c76dfc429 100644
--- a/components/libc/compilers/armlibc/sys/types.h
+++ b/components/libc/compilers/armlibc/sys/types.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef __TYPES_H__
 #define __TYPES_H__
 
diff --git a/components/libc/compilers/armlibc/sys/unistd.h b/components/libc/compilers/armlibc/sys/unistd.h
index 56979955ba..33f0561e72 100644
--- a/components/libc/compilers/armlibc/sys/unistd.h
+++ b/components/libc/compilers/armlibc/sys/unistd.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef _SYS_UNISTD_H
 #define _SYS_UNISTD_H
 
diff --git a/components/libc/compilers/armlibc/termios.h b/components/libc/compilers/armlibc/termios.h
index 0b54066a76..1956121225 100644
--- a/components/libc/compilers/armlibc/termios.h
+++ b/components/libc/compilers/armlibc/termios.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef _TERMIOS_H__
 #define _TERMIOS_H__
 
diff --git a/components/libc/compilers/armlibc/time.c b/components/libc/compilers/armlibc/time.c
index e7ad19ad3c..29c5c6cdd2 100644
--- a/components/libc/compilers/armlibc/time.c
+++ b/components/libc/compilers/armlibc/time.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #include <sys/time.h>
 #include <rtthread.h>
 
diff --git a/components/libc/compilers/armlibc/unistd.h b/components/libc/compilers/armlibc/unistd.h
index 3de0eaf398..70187722d8 100644
--- a/components/libc/compilers/armlibc/unistd.h
+++ b/components/libc/compilers/armlibc/unistd.h
@@ -1 +1,9 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #include "sys/unistd.h"
diff --git a/components/libc/compilers/common/SConscript b/components/libc/compilers/common/SConscript
new file mode 100644
index 0000000000..02bf49941d
--- /dev/null
+++ b/components/libc/compilers/common/SConscript
@@ -0,0 +1,12 @@
+from building import *
+
+Import('rtconfig')
+
+src   = Glob('*.c')
+cwd   = GetCurrentDir()
+group = []
+CPPPATH = [cwd]
+
+group = DefineGroup('libc', src, depend = ['RT_USING_LIBC'], CPPPATH = CPPPATH)
+
+Return('group')
diff --git a/components/libc/compilers/common/gmtime_r.c b/components/libc/compilers/common/gmtime_r.c
new file mode 100644
index 0000000000..dff251ab6c
--- /dev/null
+++ b/components/libc/compilers/common/gmtime_r.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2018-10-26     zylx         first version
+ */
+
+#if defined(__CC_ARM) || defined(__CLANG_ARM) || defined (__IAR_SYSTEMS_ICC__)  
+#include <sys/time.h>
+
+/* seconds per day */
+#define SPD 24*60*60
+
+/* days per month -- nonleap! */
+const short __spm[13] =
+{
+    0,
+    (31),
+    (31 + 28),
+    (31 + 28 + 31),
+    (31 + 28 + 31 + 30),
+    (31 + 28 + 31 + 30 + 31),
+    (31 + 28 + 31 + 30 + 31 + 30),
+    (31 + 28 + 31 + 30 + 31 + 30 + 31),
+    (31 + 28 + 31 + 30 + 31 + 30 + 31 + 31),
+    (31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30),
+    (31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31),
+    (31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30),
+    (31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31),
+};
+
+int __isleap(int year)
+{
+    /* every fourth year is a leap year except for century years that are
+     * not divisible by 400. */
+    /*  return (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)); */
+    return (!(year % 4) && ((year % 100) || !(year % 400)));
+}
+
+/**
+ * This function will convert Time (Restartable)
+ *
+ * @param timep the timestamp
+ * @param the structure to stores information
+ *
+ * @return the structure to stores information
+ *
+ */
+struct tm *gmtime_r(const time_t *timep, struct tm *r)
+{
+    time_t i;
+    register time_t work = *timep % (SPD);
+    r->tm_sec = work % 60;
+    work /= 60;
+    r->tm_min = work % 60;
+    r->tm_hour = work / 60;
+    work = *timep / (SPD);
+    r->tm_wday = (4 + work) % 7;
+    for (i = 1970;; ++i)
+    {
+        register time_t k = __isleap(i) ? 366 : 365;
+        if (work >= k)
+            work -= k;
+        else
+            break;
+    }
+    r->tm_year = i - 1900;
+    r->tm_yday = work;
+
+    r->tm_mday = 1;
+    if (__isleap(i) && (work > 58))
+    {
+        if (work == 59)
+            r->tm_mday = 2; /* 29.2. */
+        work -= 1;
+    }
+
+    for (i = 11; i && (__spm[i] > work); --i)
+        ;
+    r->tm_mon = i;
+    r->tm_mday += work - __spm[i];
+    return r;
+}
+#endif /* end of __CC_ARM or __CLANG_ARM or __IAR_SYSTEMS_ICC__ */
+
diff --git a/components/libc/compilers/dlib/dirent.h b/components/libc/compilers/dlib/dirent.h
index 61e77b9767..4c897cc550 100644
--- a/components/libc/compilers/dlib/dirent.h
+++ b/components/libc/compilers/dlib/dirent.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef __RTT_DIRENT_H__
 #define __RTT_DIRENT_H__
 
diff --git a/components/libc/compilers/dlib/environ.c b/components/libc/compilers/dlib/environ.c
index 1e44eb1627..ac19758838 100644
--- a/components/libc/compilers/dlib/environ.c
+++ b/components/libc/compilers/dlib/environ.c
@@ -1,20 +1,7 @@
-/* File: environ.c
- * this file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2015, RT-Thread Development Team
+/*
+ * Copyright (c) 2006-2018, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/dlib/fcntl.h b/components/libc/compilers/dlib/fcntl.h
index e69de29bb2..ce95230e88 100644
--- a/components/libc/compilers/dlib/fcntl.h
+++ b/components/libc/compilers/dlib/fcntl.h
@@ -0,0 +1,8 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
diff --git a/components/libc/compilers/dlib/libc.c b/components/libc/compilers/dlib/libc.c
index fa977ab399..8b42411a6b 100644
--- a/components/libc/compilers/dlib/libc.c
+++ b/components/libc/compilers/dlib/libc.c
@@ -1,23 +1,7 @@
 /*
- * File     : libc.c
- * Brief    : iar dlib initialization
+ * Copyright (c) 2006-2018, RT-Thread Development Team
  *
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2017, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/dlib/libc.h b/components/libc/compilers/dlib/libc.h
index d0a081d538..7b2665c32b 100644
--- a/components/libc/compilers/dlib/libc.h
+++ b/components/libc/compilers/dlib/libc.h
@@ -1,23 +1,7 @@
 /*
- * File     : libc.h
- * Brief    : iar dlib header file
+ * Copyright (c) 2006-2018, RT-Thread Development Team
  *
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2017, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/dlib/rmtx.c b/components/libc/compilers/dlib/rmtx.c
index 4bf7140271..69405c8f6a 100644
--- a/components/libc/compilers/dlib/rmtx.c
+++ b/components/libc/compilers/dlib/rmtx.c
@@ -1,21 +1,7 @@
 /*
- * File      : rmtx.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2015, RT-Thread Development Team
+ * Copyright (c) 2006-2018, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/dlib/stdio.c b/components/libc/compilers/dlib/stdio.c
index 12c1081d8b..b35ade7a38 100644
--- a/components/libc/compilers/dlib/stdio.c
+++ b/components/libc/compilers/dlib/stdio.c
@@ -1,23 +1,7 @@
 /*
- * File     : stdio.c
- * Brief    : stdio/console
+ * Copyright (c) 2006-2018, RT-Thread Development Team
  *
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2017, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/dlib/sys/errno.h b/components/libc/compilers/dlib/sys/errno.h
index 072892edc1..1ecb58b74c 100644
--- a/components/libc/compilers/dlib/sys/errno.h
+++ b/components/libc/compilers/dlib/sys/errno.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef SYS_ERRNO_H__
 #define SYS_ERRNO_H__
 
diff --git a/components/libc/compilers/dlib/sys/mman.h b/components/libc/compilers/dlib/sys/mman.h
index 024a64e911..8c61b32b7c 100644
--- a/components/libc/compilers/dlib/sys/mman.h
+++ b/components/libc/compilers/dlib/sys/mman.h
@@ -1,21 +1,7 @@
 /*
- * File      : mman.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2017, RT-Thread Development Team
+ * Copyright (c) 2006-2018, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/dlib/sys/stat.h b/components/libc/compilers/dlib/sys/stat.h
index e69de29bb2..ce95230e88 100644
--- a/components/libc/compilers/dlib/sys/stat.h
+++ b/components/libc/compilers/dlib/sys/stat.h
@@ -0,0 +1,8 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
diff --git a/components/libc/compilers/dlib/sys/time.h b/components/libc/compilers/dlib/sys/time.h
index 1acb836032..baf566936b 100644
--- a/components/libc/compilers/dlib/sys/time.h
+++ b/components/libc/compilers/dlib/sys/time.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef _SYS_TIME_H_
 #define _SYS_TIME_H_
 
@@ -44,6 +52,7 @@ struct timezone {
 };
 
 int gettimeofday(struct timeval *tp, void *ignore);
+struct tm *gmtime_r(const time_t *timep, struct tm *r);
 
 #ifdef __cplusplus
 }
diff --git a/components/libc/compilers/dlib/sys/types.h b/components/libc/compilers/dlib/sys/types.h
index b01d8283d4..4c76dfc429 100644
--- a/components/libc/compilers/dlib/sys/types.h
+++ b/components/libc/compilers/dlib/sys/types.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef __TYPES_H__
 #define __TYPES_H__
 
diff --git a/components/libc/compilers/dlib/sys/unistd.h b/components/libc/compilers/dlib/sys/unistd.h
index dbe4f3010d..5985a42996 100644
--- a/components/libc/compilers/dlib/sys/unistd.h
+++ b/components/libc/compilers/dlib/sys/unistd.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef _SYS_UNISTD_H
 #define _SYS_UNISTD_H
 
diff --git a/components/libc/compilers/dlib/syscall_close.c b/components/libc/compilers/dlib/syscall_close.c
index 5792bb3806..f46162deb7 100644
--- a/components/libc/compilers/dlib/syscall_close.c
+++ b/components/libc/compilers/dlib/syscall_close.c
@@ -1,21 +1,7 @@
 /*
- * File      : syscall_close.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2015, RT-Thread Development Team
+ * Copyright (c) 2006-2018, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/dlib/syscall_lseek.c b/components/libc/compilers/dlib/syscall_lseek.c
index 950ba52f65..b79cc410b7 100644
--- a/components/libc/compilers/dlib/syscall_lseek.c
+++ b/components/libc/compilers/dlib/syscall_lseek.c
@@ -1,21 +1,7 @@
 /*
- * File      : syscall_lseek.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2015, RT-Thread Development Team
+ * Copyright (c) 2006-2018, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/dlib/syscall_mem.c b/components/libc/compilers/dlib/syscall_mem.c
index b3933ba910..236ef1c12d 100644
--- a/components/libc/compilers/dlib/syscall_mem.c
+++ b/components/libc/compilers/dlib/syscall_mem.c
@@ -1,21 +1,7 @@
 /*
- * File      : syscall_mem.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2015, RT-Thread Development Team
+ * Copyright (c) 2006-2018, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/dlib/syscall_open.c b/components/libc/compilers/dlib/syscall_open.c
index 6194707549..96e02dc32a 100644
--- a/components/libc/compilers/dlib/syscall_open.c
+++ b/components/libc/compilers/dlib/syscall_open.c
@@ -1,22 +1,8 @@
 /*
-* File      : syscall_open.c
-* This file is part of RT-Thread RTOS
-* COPYRIGHT (C) 2006 - 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.
-*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
 * Change Logs:
 * Date           Author       Notes
 * 2015-01-28     Bernard      first version
diff --git a/components/libc/compilers/dlib/syscall_read.c b/components/libc/compilers/dlib/syscall_read.c
index e7e99629d7..e248211486 100644
--- a/components/libc/compilers/dlib/syscall_read.c
+++ b/components/libc/compilers/dlib/syscall_read.c
@@ -1,21 +1,7 @@
 /*
- * File      : syscall_read.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2015, RT-Thread Development Team
+ * Copyright (c) 2006-2018, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/dlib/syscall_remove.c b/components/libc/compilers/dlib/syscall_remove.c
index b7dd9477b7..e7f0268b1b 100644
--- a/components/libc/compilers/dlib/syscall_remove.c
+++ b/components/libc/compilers/dlib/syscall_remove.c
@@ -1,21 +1,7 @@
 /*
- * File      : syscall_remove.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2015, RT-Thread Development Team
+ * Copyright (c) 2006-2018, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/dlib/syscall_write.c b/components/libc/compilers/dlib/syscall_write.c
index 79d702339a..85c0da22c3 100644
--- a/components/libc/compilers/dlib/syscall_write.c
+++ b/components/libc/compilers/dlib/syscall_write.c
@@ -1,21 +1,7 @@
 /*
- * File      : syscall_write.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2015, RT-Thread Development Team
+ * Copyright (c) 2006-2018, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/dlib/syscalls.h b/components/libc/compilers/dlib/syscalls.h
index 2c38854f72..993962e8db 100644
--- a/components/libc/compilers/dlib/syscalls.h
+++ b/components/libc/compilers/dlib/syscalls.h
@@ -1,20 +1,7 @@
-/* File: syscalls.h
- * this file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2015, RT-Thread Development Team
+/*
+ * Copyright (c) 2006-2018, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/dlib/termios.h b/components/libc/compilers/dlib/termios.h
index 0b54066a76..1956121225 100644
--- a/components/libc/compilers/dlib/termios.h
+++ b/components/libc/compilers/dlib/termios.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef _TERMIOS_H__
 #define _TERMIOS_H__
 
diff --git a/components/libc/compilers/dlib/time.c b/components/libc/compilers/dlib/time.c
index e7ad19ad3c..87574df851 100644
--- a/components/libc/compilers/dlib/time.c
+++ b/components/libc/compilers/dlib/time.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #include <sys/time.h>
 #include <rtthread.h>
 
@@ -32,43 +40,47 @@ int gettimeofday(struct timeval *tp, void *ignore)
  * @return time_t return timestamp current.
  *
  */
+#pragma module_name = "?time"
+#if _DLIB_TIME_USES_64
+time_t __time64(time_t *t)
+#else
 /* for IAR 6.2 later Compiler */
 #if defined (__IAR_SYSTEMS_ICC__) &&  (__VER__) >= 6020000
-#pragma module_name = "?time"
-time_t (__time32)(time_t *t) /* Only supports 32-bit timestamp */
+time_t __time32(time_t *t)
 #else
 time_t time(time_t *t)
 #endif
+#endif
 {
-    time_t time_now = 0;
-
+  time_t time_now = 0;
+  
 #ifdef RT_USING_RTC
-    static rt_device_t device = RT_NULL;
-
-    /* optimization: find rtc device only first. */
-    if (device == RT_NULL)
-    {
-        device = rt_device_find("rtc");
-    }
-
-    /* read timestamp from RTC device. */
-    if (device != RT_NULL)
+  static rt_device_t device = RT_NULL;
+  
+  /* optimization: find rtc device only first. */
+  if (device == RT_NULL)
+  {
+    device = rt_device_find("rtc");
+  }
+  
+  /* read timestamp from RTC device. */
+  if (device != RT_NULL)
+  {
+    if (rt_device_open(device, 0) == RT_EOK)
     {
-        if (rt_device_open(device, 0) == RT_EOK)
-        {
-            rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time_now);
-            rt_device_close(device);
-        }
+      rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time_now);
+      rt_device_close(device);
     }
+  }
 #endif /* RT_USING_RTC */
-
-    /* if t is not NULL, write timestamp to *t */
-    if (t != RT_NULL)
-    {
-        *t = time_now;
-    }
-
-    return time_now;
+  
+  /* if t is not NULL, write timestamp to *t */
+  if (t != RT_NULL)
+  {
+    *t = time_now;
+  }
+  
+  return time_now;
 }
 
 RT_WEAK clock_t clock(void)
diff --git a/components/libc/compilers/dlib/unistd.h b/components/libc/compilers/dlib/unistd.h
index d67f8fb6f2..a07d8409c2 100644
--- a/components/libc/compilers/dlib/unistd.h
+++ b/components/libc/compilers/dlib/unistd.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef _UNISTD_H_
 #define _UNISTD_H_
 
diff --git a/components/libc/compilers/minilibc/ctype.c b/components/libc/compilers/minilibc/ctype.c
index fed8f583a6..b94ff2dae8 100644
--- a/components/libc/compilers/minilibc/ctype.c
+++ b/components/libc/compilers/minilibc/ctype.c
@@ -1,11 +1,7 @@
 /*
- * File      : ctype.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2008, RT-Thread Development Team
+ * Copyright (c) 2006-2018, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/minilibc/ctype.h b/components/libc/compilers/minilibc/ctype.h
index 6b93490d36..5f41376ed8 100644
--- a/components/libc/compilers/minilibc/ctype.h
+++ b/components/libc/compilers/minilibc/ctype.h
@@ -1,11 +1,7 @@
 /*
- * File      : ctype.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2008, RT-Thread Development Team
+ * Copyright (c) 2006-2018, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/minilibc/errno.h b/components/libc/compilers/minilibc/errno.h
index 74b8296241..a7ee380594 100644
--- a/components/libc/compilers/minilibc/errno.h
+++ b/components/libc/compilers/minilibc/errno.h
@@ -1,77 +1,16 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef __ERRNO_H__
 #define __ERRNO_H__
 
-#ifdef RT_USING_DFS
-
-#include <dfs_def.h>
-
-/* using device error codes */
-#define ENOENT		DFS_STATUS_ENOENT
-#define EIO		 	DFS_STATUS_EIO
-#define ENXIO		DFS_STATUS_ENXIO
-#define EBADF		DFS_STATUS_EBADF
-#define EAGAIN		DFS_STATUS_EAGAIN
-#define ENOMEM		DFS_STATUS_ENOMEM
-#define EBUSY		DFS_STATUS_EBUSY
-#define EEXIST		DFS_STATUS_EEXIST
-#define EXDEV		DFS_STATUS_EXDEV
-#define ENODEV		DFS_STATUS_ENODEV
-#define ENOTDIR		DFS_STATUS_ENOTDIR
-#define EISDIR		DFS_STATUS_EISDIR
-#define EINVAL		DFS_STATUS_EINVAL
-#define ENOSPC		DFS_STATUS_ENOSPC
-#define EROFS		DFS_STATUS_EROFS
-#define ENOSYS		DFS_STATUS_ENOSYS
-#define ENOTEMPTY	DFS_STATUS_ENOTEMPTY
-
-#else
-
-/* error codes */
-#define ENOENT		2		/* No such file or directory */
-#define EIO		 	5		/* I/O error */
-#define ENXIO		6		/* No such device or address */
-#define EBADF		9		/* Bad file number */
-#define EAGAIN		11		/* Try again */
-#define ENOMEM		12		/* no memory */
-#define EBUSY		16		/* Device or resource busy */
-#define EEXIST		17		/* File exists */
-#define EXDEV		18		/* Cross-device link */
-#define ENODEV		19		/* No such device */
-#define ENOTDIR		20		/* Not a directory */
-#define EISDIR		21		/* Is a directory */
-#define EINVAL		22		/* Invalid argument */
-#define ENOSPC		28		/* No space left on device */
-#define EROFS		30		/* Read-only file system */
-#define ENOSYS		38		/* Function not implemented */
-#define ENOTEMPTY	39		/* Directory not empty */
-
-#endif
-
-#define	EPERM			1		/* Not super-user */
-#define	ESRCH			3		/* No such process */
-#define	EINTR			4		/* Interrupted system call */
-#define EFAULT       	14  	/* Bad address */
-#define	ENFILE			23		/* Too many open files in system */
-#define ERANGE			34		/* Math result not representable */
-#define	EDEADLK			45		/* Deadlock condition */
-#define EBADMSG			77		/* Trying to read unreadable message */
-#define EMSGSIZE     	90  	/* Message too long */
-#define ENOPROTOOPT  	92  	/* Protocol not available */
-#define EOPNOTSUPP      95  	/* Operation not supported on transport endpoint */
-#define EAFNOSUPPORT    97  	/* Address family not supported by protocol */
-#define EADDRINUSE      98  	/* Address already in use */
-#define ENETDOWN       	100  	/* Network is down */
-#define ENETUNREACH    	101  	/* Network is unreachable */
-#define ECONNABORTED   	103  	/* Software caused connection abort */
-#define ECONNRESET     	104  	/* Connection reset by peer */
-#define ENOBUFS     	105  	/* No buffer space available */
-#define ENOTCONN       	107  	/* Transport endpoint is not connected */
-#define EINPROGRESS    	115  	/* Operation now in progress */
-#define ETIMEDOUT		116		/* Connection timed out */
-#define EHOSTUNREACH 	113  	/* No route to host */
-#define EALREADY        114  	/* Operation already in progress */
-#define ENOTSUP			134		/* Not supported */
+#include "libc/libc_errno.h"
+/* Others defined in libc/libc_errno.h */
 #define ENSRNOTFOUND 	163  	/* Domain name not found */
-#define EWOULDBLOCK 	EAGAIN  /* Operation would block */
 
 #endif
diff --git a/components/libc/compilers/minilibc/inttypes.h b/components/libc/compilers/minilibc/inttypes.h
index 84e036a043..8bab743655 100644
--- a/components/libc/compilers/minilibc/inttypes.h
+++ b/components/libc/compilers/minilibc/inttypes.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef __INTTYPES_H__
 #define __INTTYPES_H__
 
diff --git a/components/libc/compilers/minilibc/math.c b/components/libc/compilers/minilibc/math.c
index 27315a428c..cd5770178e 100644
--- a/components/libc/compilers/minilibc/math.c
+++ b/components/libc/compilers/minilibc/math.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #include <math.h>
 
 /*
diff --git a/components/libc/compilers/minilibc/math.h b/components/libc/compilers/minilibc/math.h
index b436eb08b5..9ddb9c859b 100644
--- a/components/libc/compilers/minilibc/math.h
+++ b/components/libc/compilers/minilibc/math.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef __MATH_H__
 #define __MATH_H__
 
diff --git a/components/libc/compilers/minilibc/qsort.c b/components/libc/compilers/minilibc/qsort.c
index f412986e1d..2b97ce763c 100644
--- a/components/libc/compilers/minilibc/qsort.c
+++ b/components/libc/compilers/minilibc/qsort.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #include <sys/types.h>
 #include <stdlib.h>
 
diff --git a/components/libc/compilers/minilibc/rand.c b/components/libc/compilers/minilibc/rand.c
index 387d605d4c..88603dc808 100644
--- a/components/libc/compilers/minilibc/rand.c
+++ b/components/libc/compilers/minilibc/rand.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #include <stdlib.h>
 #include <stdint.h>
 #include <sys/types.h>
diff --git a/components/libc/compilers/minilibc/stddef.h b/components/libc/compilers/minilibc/stddef.h
index 8068277117..7353a157cb 100644
--- a/components/libc/compilers/minilibc/stddef.h
+++ b/components/libc/compilers/minilibc/stddef.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef __STDDEF_H__
 #define __STDDEF_H__
 
diff --git a/components/libc/compilers/minilibc/stdint.h b/components/libc/compilers/minilibc/stdint.h
index c865d43435..bd5fdc83f5 100644
--- a/components/libc/compilers/minilibc/stdint.h
+++ b/components/libc/compilers/minilibc/stdint.h
@@ -1,4 +1,12 @@
 /*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+/*
  * ISO C Standard:  7.18  Integer types  <stdint.h>
  */
 
diff --git a/components/libc/compilers/minilibc/stdio.h b/components/libc/compilers/minilibc/stdio.h
index a6ecb32931..678682cf5e 100644
--- a/components/libc/compilers/minilibc/stdio.h
+++ b/components/libc/compilers/minilibc/stdio.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef __STDIO_H__
 #define __STDIO_H__
 
diff --git a/components/libc/compilers/minilibc/stdlib.c b/components/libc/compilers/minilibc/stdlib.c
index e29ae9bc2e..8154ec5b8b 100644
--- a/components/libc/compilers/minilibc/stdlib.c
+++ b/components/libc/compilers/minilibc/stdlib.c
@@ -1,11 +1,7 @@
 /*
- * File      : stdlib.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2008, RT-Thread Development Team
+ * Copyright (c) 2006-2018, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/minilibc/stdlib.h b/components/libc/compilers/minilibc/stdlib.h
index 4e87537d3f..d57d95b64d 100644
--- a/components/libc/compilers/minilibc/stdlib.h
+++ b/components/libc/compilers/minilibc/stdlib.h
@@ -1,11 +1,7 @@
 /*
- * File      : stdlib.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2008, RT-Thread Development Team
+ * Copyright (c) 2006-2018, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/minilibc/string.c b/components/libc/compilers/minilibc/string.c
index 4e90da1554..1ab7c0509f 100644
--- a/components/libc/compilers/minilibc/string.c
+++ b/components/libc/compilers/minilibc/string.c
@@ -1,11 +1,7 @@
 /*
- * File      : string.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2008, RT-Thread Development Team
+ * Copyright (c) 2006-2018, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/minilibc/string.h b/components/libc/compilers/minilibc/string.h
index 089903e993..45524c7764 100644
--- a/components/libc/compilers/minilibc/string.h
+++ b/components/libc/compilers/minilibc/string.h
@@ -1,11 +1,7 @@
 /*
- * File      : string.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2008, RT-Thread Development Team
+ * Copyright (c) 2006-2018, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/minilibc/sys/mman.h b/components/libc/compilers/minilibc/sys/mman.h
index 024a64e911..8c61b32b7c 100644
--- a/components/libc/compilers/minilibc/sys/mman.h
+++ b/components/libc/compilers/minilibc/sys/mman.h
@@ -1,21 +1,7 @@
 /*
- * File      : mman.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2017, RT-Thread Development Team
+ * Copyright (c) 2006-2018, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/minilibc/sys/stat.h b/components/libc/compilers/minilibc/sys/stat.h
index 7826cba945..65db477a4a 100644
--- a/components/libc/compilers/minilibc/sys/stat.h
+++ b/components/libc/compilers/minilibc/sys/stat.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef __STAT_H__
 #define __STAT_H__
 
diff --git a/components/libc/compilers/minilibc/sys/time.h b/components/libc/compilers/minilibc/sys/time.h
index 9cb330df5c..22a93f5c9d 100644
--- a/components/libc/compilers/minilibc/sys/time.h
+++ b/components/libc/compilers/minilibc/sys/time.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef _SYS_TIME_H_
 #define _SYS_TIME_H_
 
diff --git a/components/libc/compilers/minilibc/sys/types.h b/components/libc/compilers/minilibc/sys/types.h
index 850bafea43..0c00a79d1e 100644
--- a/components/libc/compilers/minilibc/sys/types.h
+++ b/components/libc/compilers/minilibc/sys/types.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef __TYPES_H__
 #define __TYPES_H__
 
diff --git a/components/libc/compilers/minilibc/time.c b/components/libc/compilers/minilibc/time.c
index 605f6f573e..508558bafc 100644
--- a/components/libc/compilers/minilibc/time.c
+++ b/components/libc/compilers/minilibc/time.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #include <time.h>
 #include <rtthread.h>
 
diff --git a/components/libc/compilers/minilibc/time.h b/components/libc/compilers/minilibc/time.h
index d64feba0b8..09fc7d2e67 100644
--- a/components/libc/compilers/minilibc/time.h
+++ b/components/libc/compilers/minilibc/time.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef __TIME_H__
 #define __TIME_H__
 
diff --git a/components/libc/compilers/newlib/libc.c b/components/libc/compilers/newlib/libc.c
index 0b7350c30e..2234c36f98 100644
--- a/components/libc/compilers/newlib/libc.c
+++ b/components/libc/compilers/newlib/libc.c
@@ -1,23 +1,7 @@
 /*
- * File     : libc.c
- * Brief    : gcc libc header file
+ * Copyright (c) 2006-2018, RT-Thread Development Team
  *
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2017, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
@@ -39,7 +23,7 @@ int	_EXFUN(putenv,(char *__string));
 
 int libc_system_init(void)
 {
-#if defined(RT_USING_DFS) & defined(RT_USING_DFS_DEVFS)
+#if defined(RT_USING_DFS) & defined(RT_USING_DFS_DEVFS) & defined(RT_USING_CONSOLE)
     rt_device_t dev_console;
 
     dev_console = rt_console_get_device();
@@ -51,11 +35,11 @@ int libc_system_init(void)
         libc_stdio_set_console(dev_console->parent.name, O_WRONLY);
     #endif
     }
-#endif
 
     /* set PATH and HOME */
     putenv("PATH=/bin");
     putenv("HOME=/home");
+#endif
 
 #if defined RT_USING_PTHREADS && !defined RT_USING_COMPONENTS_INIT
     pthread_system_init();
diff --git a/components/libc/compilers/newlib/libc.h b/components/libc/compilers/newlib/libc.h
index d077de9656..ab9334fe26 100644
--- a/components/libc/compilers/newlib/libc.h
+++ b/components/libc/compilers/newlib/libc.h
@@ -1,23 +1,7 @@
 /*
- * File     : libc.h
- * Brief    : gcc libc header file
+ * Copyright (c) 2006-2018, RT-Thread Development Team
  *
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2017, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
@@ -26,8 +10,15 @@
 #ifndef __RTT_LIBC_H__
 #define __RTT_LIBC_H__
 
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
 #include <sys/time.h>
 
+#ifndef _EXFUN
+#define _EXFUN(name, proto)		name proto
+#endif
+
 #define MILLISECOND_PER_SECOND  1000UL
 #define MICROSECOND_PER_SECOND  1000000UL
 #define NANOSECOND_PER_SECOND   1000000000UL
diff --git a/components/libc/compilers/newlib/libc_syms.c b/components/libc/compilers/newlib/libc_syms.c
index ed8686e5dd..b150c10fd6 100644
--- a/components/libc/compilers/newlib/libc_syms.c
+++ b/components/libc/compilers/newlib/libc_syms.c
@@ -1,23 +1,7 @@
 /*
- * File     : libc_syms.c
- * Brief    : exported symbols for libc.
+ * Copyright (c) 2006-2018, RT-Thread Development Team
  *
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2017, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/newlib/stdio.c b/components/libc/compilers/newlib/stdio.c
index 9f30106b72..233a447396 100644
--- a/components/libc/compilers/newlib/stdio.c
+++ b/components/libc/compilers/newlib/stdio.c
@@ -1,23 +1,7 @@
 /*
- * File     : stdio.c
- * Brief    : stdio for newlib
+ * Copyright (c) 2006-2018, RT-Thread Development Team
  *
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2017, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/newlib/sys/dirent.h b/components/libc/compilers/newlib/sys/dirent.h
index 2efc683579..db8c0655a1 100644
--- a/components/libc/compilers/newlib/sys/dirent.h
+++ b/components/libc/compilers/newlib/sys/dirent.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef __RTT_DIRENT_H__
 #define __RTT_DIRENT_H__
 
diff --git a/components/libc/compilers/newlib/sys/mman.h b/components/libc/compilers/newlib/sys/mman.h
index 024a64e911..8c61b32b7c 100644
--- a/components/libc/compilers/newlib/sys/mman.h
+++ b/components/libc/compilers/newlib/sys/mman.h
@@ -1,21 +1,7 @@
 /*
- * File      : mman.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2017, RT-Thread Development Team
+ * Copyright (c) 2006-2018, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/components/libc/compilers/newlib/sys/statfs.h b/components/libc/compilers/newlib/sys/statfs.h
index 95772b5ead..3c923a21f9 100644
--- a/components/libc/compilers/newlib/sys/statfs.h
+++ b/components/libc/compilers/newlib/sys/statfs.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef __RTT_STATFS_H__
 #define __RTT_STATFS_H__
 
diff --git a/components/libc/compilers/newlib/sys/termios.h b/components/libc/compilers/newlib/sys/termios.h
index e69de29bb2..ce95230e88 100644
--- a/components/libc/compilers/newlib/sys/termios.h
+++ b/components/libc/compilers/newlib/sys/termios.h
@@ -0,0 +1,8 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
diff --git a/components/libc/compilers/newlib/syscalls.c b/components/libc/compilers/newlib/syscalls.c
index 822182ba93..e4cda478cb 100644
--- a/components/libc/compilers/newlib/syscalls.c
+++ b/components/libc/compilers/newlib/syscalls.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #include <reent.h>
 #include <sys/errno.h>
 #include <sys/time.h>
@@ -11,6 +19,10 @@
 #include <pthread.h>
 #endif
 
+#ifdef RT_USING_MODULE
+#include <dlmodule.h>
+#endif
+
 /* Reentrant versions of system calls.  */
 
 int
@@ -379,18 +391,12 @@ _free_r (struct _reent *ptr, void *addr)
 }
 
 void
-_exit (int status)
+exit (int status)
 {
 #ifdef RT_USING_MODULE
-    rt_module_t module;
-
-    module = rt_module_self();
-    if (module != RT_NULL)
+    if (dlmodule_self())
     {
-        rt_thread_suspend(rt_thread_self());
-
-        /* re-schedule */
-        rt_schedule();
+        dlmodule_exit(status);
     }
 #endif
 
diff --git a/components/libc/compilers/newlib/termios.h b/components/libc/compilers/newlib/termios.h
index 0b54066a76..1956121225 100644
--- a/components/libc/compilers/newlib/termios.h
+++ b/components/libc/compilers/newlib/termios.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #ifndef _TERMIOS_H__
 #define _TERMIOS_H__
 
diff --git a/components/libc/compilers/newlib/time.c b/components/libc/compilers/newlib/time.c
index e7ad19ad3c..29c5c6cdd2 100644
--- a/components/libc/compilers/newlib/time.c
+++ b/components/libc/compilers/newlib/time.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
 #include <sys/time.h>
 #include <rtthread.h>