问ubuntu undefined reference to `sys_nerr'？

/home/zwj/simplescalar/gcc-2.7.2.3/gcc.c:1595: 警告： the use of `mktemp' is dangerous, better use `mkstemp' or `mkdtemp'

/usr/bin/ld: gcc.o: in function `pfatal_with_name':

/home/zwj/simplescalar/gcc-2.7.2.3/gcc.c:4737: undefined reference to `sys_nerr'

/usr/bin/ld: gcc.o: in function `perror_with_name':

/home/zwj/simplescalar/gcc-2.7.2.3/gcc.c:4750: undefined reference to `sys_nerr'

/usr/bin/ld: gcc.o: in function `perror_exec':

/home/zwj/simplescalar/gcc-2.7.2.3/gcc.c:4763: undefined reference to `sys_nerr'

collect2: error: ld returned 1 exit status

make: *** [Makefile:955：xgcc] 错误 1

请问怎么处理呢？谢谢！