1、【优化】编译配置。

Signed-off-by: armink <armink.ztl@gmail.com>

SConscript

@@ -14,6 +14,11 @@ path   += [cwd + '/port']
 
 LOCAL_CCFLAGS = ' -include "port/mpy_project_cfg.h"'
 
+if rtconfig.CROSS_TOOL == 'gcc':
+    LOCAL_CCFLAGS += ' -std=c99'
+elif rtconfig.CROSS_TOOL == 'keil':
+    LOCAL_CCFLAGS += ' --c99'
+
 group = DefineGroup('MicroPython', src, depend = ['PKG_USING_MICROPYTHON'], CPPPATH = path, LOCAL_CCFLAGS = LOCAL_CCFLAGS)
 
 Return('group')