cleanup scons building script

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1065 bbd45198-f89e-11dd-88c7-29a3b14d5316

src/SConscript

@@ -1,23 +1,8 @@
-Import('env')
 Import('RTT_ROOT')
-Import('projects')
+from building import *
 
-# The set of source files associated with this SConscript file.
-src_local = Glob('*.c')
+src     = Glob('*.c')
+CPPPATH = [RTT_ROOT + '/include']
+group   = DefineGroup('Kernel', src, depend = [''], CPPPATH = CPPPATH)
 
-# group definitions
-group = {}
-group['name'] = 'Kernel'
-group['src'] = File(src_local)
-group['CCFLAGS'] = ''
-group['CPPPATH'] = [RTT_ROOT + '/include']
-group['CPPDEFINES'] = ''
-group['LINKFLAGS'] = ''
-
-# add group to project list
-projects.append(group)
-
-env.Append(CPPPATH = group['CPPPATH'])
-obj = env.Object(group['src'])
-
-Return('obj')
+Return('group')