Keil 编译IEC61131-3库，头文件，大量出现以下错误；

cast to type ？ is not allowed

compiling resource1.c...
..\PLC\rts\matiec\lib\C\iec_std_functions.h(192): error:  #119: cast to type "TIME" is not allowed
  __ANY_BIT(__iec_)
..\PLC\rts\matiec\lib\C\iec_std_functions.h(192): error:  #119: cast to type "TIME" is not allowed
  __ANY_BIT(__iec_)

..\PLC\rts\matiec\lib\C\iec_std_functions.h(196): error:  #119: cast to type "DATE" is not allowed
  __ANY_BIT(__to_anydate_)
..\PLC\rts\matiec\lib\C\iec_std_functions.h(196): error:  #119: cast to type "TOD" is not allowed
  __ANY_BIT(__to_anydate_)
..\PLC\rts\matiec\lib\C\iec_std_functions.h(196): error:  #119: cast to type "DT" is not allowed
  __ANY_BIT(__to_anydate_)
..\PLC\rts\matiec\lib\C\iec_std_functions.h(196): error:  #119: cast to type "DATE" is not allowed

通过如下方式解决：

 --gnu -Dlittle_endian

C99 Mode