创建，添加sdram

rt-thread/components/finsh/SConscript

@@ -0,0 +1,26 @@
+from building import *
+from gcc import GetGCCLikePLATFORM
+
+cwd     = GetCurrentDir()
+src     = Split('''
+shell.c
+msh.c
+msh_parse.c
+''')
+
+CPPPATH = [cwd]
+LOCAL_CFLAGS = ''
+
+if rtconfig.PLATFORM in ['gcc']: # only for GCC
+    LOCAL_CFLAGS += ' -Wstack-usage=' + str(GetConfigValue('FINSH_THREAD_STACK_SIZE')) # check finsh thread stack size
+
+if GetDepend('MSH_USING_BUILT_IN_COMMANDS'):
+    src += ['cmd.c']
+
+if GetDepend('DFS_USING_POSIX'):
+    src += ['msh_file.c']
+
+group = DefineGroup('Finsh', src, depend = ['RT_USING_FINSH'], CPPPATH = CPPPATH,
+                    LOCAL_CFLAGS = LOCAL_CFLAGS)
+
+Return('group')