[求助]在线等,关于编译

  实在不行,在线求助吧.谁知道这个错怎么办?是用flex 和bison做的简单的语法编译器,编译环境是windows 下的cgwin.

如果哪位[color=red]好心[/color]大哥,有用简单的编译器源码,和相关资料也请留言,OR信箱.
C:\bl>flex interpreter.l

C:\bl>bison interpreter.y

C:\bl>gcc interpreter.tab.c -lfl
/cygdrive/c/DOCUME~1/steep/LOCALS~1/Temp/cc48KRtF.o:interpreter.tab.c:(.text+0x436): undefined reference to `_ec_tr
ee'
/cygdrive/c/DOCUME~1/steep/LOCALS~1/Temp/cc48KRtF.o:interpreter.tab.c:(.text+0x447): undefined reference to `_x'
/cygdrive/c/DOCUME~1/steep/LOCALS~1/Temp/cc48KRtF.o:interpreter.tab.c:(.text+0x44f): undefined reference to `_ec_as
gn'
/cygdrive/c/DOCUME~1/steep/LOCALS~1/Temp/cc48KRtF.o:interpreter.tab.c:(.text+0x459): undefined reference to `_ec_la
bel'
/cygdrive/c/DOCUME~1/steep/LOCALS~1/Temp/cc48KRtF.o:interpreter.tab.c:(.text+0x46f): undefined reference to `_ec_ps
tr'
/cygdrive/c/DOCUME~1/steep/LOCALS~1/Temp/cc48KRtF.o:interpreter.tab.c:(.text+0x485): undefined reference to `_x'
/cygdrive/c/DOCUME~1/steep/LOCALS~1/Temp/cc48KRtF.o:interpreter.tab.c:(.text+0x48d): undefined reference to `_ec_pv
ar'
/cygdrive/c/DOCUME~1/steep/LOCALS~1/Temp/cc48KRtF.o:interpreter.tab.c:(.text+0x497): undefined reference to `_ec_ad
dr'
/cygdrive/c/DOCUME~1/steep/LOCALS~1/Temp/cc48KRtF.o:interpreter.tab.c:(.text+0x4a8): undefined reference to `_ec_tr
ee'

下面还有不粘了,一类错误.在线等.谢谢

还没人来啊~.真的是在线等哦

谁能帮帮我哦！！
我很着急哦！！
用for循环编程
1*1+2*2+3*3+……10*10
好心人帮帮我哦

谁能帮帮我哦！！
我很着急哦！！
用for循环编程
1*1+2*2+3*3+……10*10
好心人帮帮我哦