[tools] attach #6764 (#6799)

tools/building.py

@@ -209,7 +209,7 @@ def PrepareBuilding(env, root_directory, has_libcpu=False, remove_components = [
 
     exec_prefix = GetOption('exec-prefix')
     if exec_prefix:
-        os.environ['RTT_EXEC_PREFIX'] = exec_prefix
+        os.environ['RTT_CC_PREFIX'] = exec_prefix
 
     # auto change the 'RTT_EXEC_PATH' when 'rtconfig.EXEC_PATH' get failed
     if not os.path.exists(rtconfig.EXEC_PATH):

tools/options.py

@@ -85,11 +85,11 @@ def AddOptions():
                       dest = 'target',
                       type = 'string',
                       help = 'set target project: mdk/mdk4/mdk5/iar/vs/vsc/ua/cdk/ses/makefile/eclipse/codelite/cmake')
-    AddOption('--exec-prefix',
+    AddOption('--cc-prefix', '--exec-prefix',
                 dest = 'exec-prefix',
                 type = 'string',
-                help = 'set RTT_EXEC_PREFIX temperately')
-    AddOption('--exec-path',
+                help = 'set RTT_CC_PREFIX temperately')
+    AddOption('--cc-path', '--exec-path',
                 dest = 'exec-path',
                 type = 'string',
                 help = 'set RTT_EXEC_PATH temperately')