update the rtconfig.py and SConstruct in the BSP

in order to use buildbot.py

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2028 bbd45198-f89e-11dd-88c7-29a3b14d5316

bsp/at91sam9260/rtconfig.py

@@ -1,3 +1,4 @@
+import os
 
 # toolchains options
 ARCH     = 'arm'
@@ -6,12 +7,24 @@ TextBase = '0x20000000'
 
 CROSS_TOOL 	= 'gcc'
 
+if os.getenv('RTT_CC'):
+	CROSS_TOOL = os.getenv('RTT_CC')
+
 if  CROSS_TOOL == 'gcc':
 	PLATFORM 	= 'gcc'
 	EXEC_PATH 	= '/opt/arm-2010q1/bin/'
 elif CROSS_TOOL == 'keil':
 	PLATFORM 	= 'armcc'
 	EXEC_PATH 	= 'E:/Keil'
+elif CROSS_TOOL == 'iar':
+    print '================ERROR============================'
+    print 'Not support yet!'
+    print '================================================='
+    exit(0)
+
+if os.getenv('RTT_EXEC_PATH'):
+	EXEC_PATH = os.getenv('RTT_EXEC_PATH')
+
 #BUILD = 'debug'
 BUILD = 'release'
 
@@ -69,14 +82,3 @@ elif PLATFORM == 'armcc':
         CFLAGS += ' -O2'
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
-
-elif PLATFORM == 'iar':
-    # toolchains
-    CC = 'armcc'
-    AS = 'armasm'
-    AR = 'armar'
-    LINK = 'armlink'
-
-    CFLAGS = ''
-    AFLAGS = ''
-    LFLAGS = ''