import RT-Thread@9217865c without bsp, libcpu and components/net

components/libc/posix/io/stdio/SConscript

@@ -0,0 +1,22 @@
+# RT-Thread building script for component
+
+import os
+from building import *
+
+src     = []
+cwd     = GetCurrentDir()
+CPPPATH = [cwd]
+group   = []
+
+if GetDepend('RT_USING_POSIX_STDIO'):
+    src += ['libc.c']
+
+group = DefineGroup('POSIX', src, depend = [''], CPPPATH = CPPPATH)
+
+list = os.listdir(cwd)
+for d in list:
+    path = os.path.join(cwd, d)
+    if os.path.isfile(os.path.join(path, 'SConscript')):
+        group = group + SConscript(os.path.join(d, 'SConscript'))
+
+Return('group')