5 files changed, 51 insertions, 12 deletions
diff --git a/components/libc/compilers/armlibc/sys/types.h b/components/libc/compilers/armlibc/sys/types.h
index 78fee1bb99..bcca8fae1a 100644
--- a/components/libc/compilers/armlibc/sys/types.h
+++ b/components/libc/compilers/armlibc/sys/types.h
@@ -23,4 +23,10 @@ typedef long signed int  ssize_t;       /* Used for a count of bytes or an error
 #endif
 typedef unsigned long    useconds_t;    /* microseconds (unsigned) */
 
+typedef unsigned long    dev_t;
+
+typedef unsigned int     u_int;
+typedef unsigned char    u_char;
+typedef unsigned long    u_long;
+
 #endif
diff --git a/components/libc/compilers/common/SConscript b/components/libc/compilers/common/SConscript
index ecdee2637e..319e1a3555 100644
--- a/components/libc/compilers/common/SConscript
+++ b/components/libc/compilers/common/SConscript
@@ -10,7 +10,7 @@ CPPPATH = [cwd]
 if GetDepend('RT_USING_LIBC'):
     src += Glob('*.c')
 else:
-    if GetDepend('RT_LIBC_USING_TIME') and not GetDepend('RT_USING_MINILIBC'):
+    if GetDepend('RT_LIBC_USING_TIME'):
         src += ['time.c']
 
 if GetDepend('RT_USING_POSIX') == False:
@@ -21,7 +21,7 @@ if rtconfig.CROSS_TOOL == 'keil':
 else:
     CPPDEFINES = []
 
-if not GetDepend('RT_USING_MINILIBC') and (GetDepend('RT_USING_LIBC') or GetDepend('RT_LIBC_USING_TIME')):
+if GetDepend('RT_USING_LIBC') or GetDepend('RT_LIBC_USING_TIME'):
     group = DefineGroup('libc', src, depend = [''], CPPPATH = CPPPATH, CPPDEFINES = CPPDEFINES)
 
 Return('group')
diff --git a/components/libc/compilers/dlib/sys/types.h b/components/libc/compilers/dlib/sys/types.h
index 7dbeddcaa9..9ae7906fb1 100644
--- a/components/libc/compilers/dlib/sys/types.h
+++ b/components/libc/compilers/dlib/sys/types.h
@@ -22,4 +22,10 @@ typedef long signed int  ssize_t;       /* Used for a count of bytes or an error
 #endif
 typedef unsigned long    useconds_t;    /* microseconds (unsigned) */
 
+typedef unsigned long    dev_t;
+
+typedef unsigned int     u_int;
+typedef unsigned char    u_char;
+typedef unsigned long    u_long;
+
 #endif
diff --git a/components/libc/compilers/newlib/SConscript b/components/libc/compilers/newlib/SConscript
index d0868bbdea..b1ad6e4784 100644
--- a/components/libc/compilers/newlib/SConscript
+++ b/components/libc/compilers/newlib/SConscript
@@ -1,21 +1,30 @@
 from building import *
 Import('rtconfig')
 
-src = Glob('*.c')
+src = []
 cwd = GetCurrentDir()
 group = []
 
 CPPPATH = [cwd]
-CPPDEFINES = ['RT_USING_NEWLIB']
-
-# link with libc and libm:
-# libm is a frequently used lib. Newlib is compiled with -ffunction-sections in
-# recent GCC tool chains. The linker would just link in the functions that have
-# been referenced. So setting this won't result in bigger text size.
-LIBS = ['c', 'm']
 
 if rtconfig.PLATFORM == 'gcc':
-    group = DefineGroup('libc', src, depend = ['RT_USING_LIBC'], 
-        CPPPATH = CPPPATH, CPPDEFINES = CPPDEFINES, LIBS = LIBS)
+    if GetDepend('RT_USING_LIBC'):
+        CPPDEFINES = ['RT_USING_NEWLIB']
+        # link with libc and libm:
+        # libm is a frequently used lib. Newlib is compiled with -ffunction-sections in
+        # recent GCC tool chains. The linker would just link in the functions that have
+        # been referenced. So setting this won't result in bigger text size.
+        LIBS = ['c', 'm']
+
+        src += Glob('*.c')
+        SrcRemove(src, ['minilib.c'])
+        if GetDepend('RT_USING_MODULE') == False:
+            SrcRemove(src, ['libc_syms.c'])
+    else:
+        src += ['minilib.c']
+        CPPDEFINES = []
+        LIBS = []
+
+    group = DefineGroup('libc', src, depend = [], CPPPATH = CPPPATH, CPPDEFINES = CPPDEFINES, LIBS = LIBS)
 
 Return('group')
diff --git a/components/libc/compilers/newlib/minilib.c b/components/libc/compilers/newlib/minilib.c
new file mode 100644
index 0000000000..2d07eabe5a
--- /dev/null
+++ b/components/libc/compilers/newlib/minilib.c
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-02-23     Meco Man     first version
+ */
+
+#include <reent.h>
+#include <rtthread.h>
+
+void * _sbrk_r(struct _reent *ptr, ptrdiff_t incr)
+{
+    /* no use this routine to get memory */
+    return RT_NULL;
+}