在BLFS 6.3中编译 opehssh-4.7p1 遇到xcrypt.c error

出错信息如下,请高手指点,谢谢
/sources/openssh-4.7.p1/openbsd-compat/xcrypt.c:69: undefined reference to 'crypt'
collect2: ld returned 1 exit status
make : *** [sshd] Error 1

This package is vulnerable. You should install new version:

http://www.linuxfromscratch.org/blfs...r/openssh.html