在编译postfix的时候遇到了错误.帮帮我吧?!

小丑奇兵

/usr/lib/libdb.so: undefined reference to `pthread_condattr_setpshared'
/usr/lib/libdb.so: undefined reference to `pthread_mutexattr_destroy'
/usr/lib/libdb.so: undefined reference to `pthread_mutexattr_setpshared'
/usr/lib/libdb.so: undefined reference to `pthread_mutexattr_init'
/usr/lib/libdb.so: undefined reference to `pthread_mutex_trylock'
collect2: ld returned 1 exit status
make: *** [master] 错误 1
make: *** [update] 错误 1
[root@xcqb_LFS /source/soft/postfix-2.0.19]#
我的db-4.1.25已经正常安装成功了.但是每次都出现了这样的错误.怎么办呢?
比较郁闷的说.不知道这个是怎么回事呢?