[newlib] 处理newlib版本不一致导致的问题

components/libc/compilers/gcc/newlib/SConscript

@@ -1,4 +1,6 @@
+import os
 from building import *
+from gcc import *
 Import('rtconfig')
 
 src = []
@@ -14,9 +16,19 @@ if rtconfig.PLATFORM == 'gcc':
     else:
         src += ['syscalls.c']
 
+    #report newlib version
+    print('Newlib version:' + GetNewLibVersion(rtconfig))
+
     # identify this is Newlib, and only enable POSIX.1-1990
     CPPDEFINES = ['RT_USING_NEWLIB', '_POSIX_C_SOURCE=1']
 
     group = DefineGroup('libc', src, depend = [], CPPPATH = CPPPATH, CPPDEFINES = CPPDEFINES, LIBS = LIBS)
 
+
+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')