编译firebird bbs时，make的错误：

gcc -o bbsd -O2 -Wunused -I../include -DSHOW_IDLE_TIME -DWITHOUT_CHROOT admintool.o announce.o bbs.o bbsd.o bbsgopher.o bcache.o bm.o boards.o chat.o comm_lists.o delete.o edit.o fileshm.o goodbye.o help.o io.o list.o mail.o main.o maintain.o modetype.o more.o namecomplete.o pass.o paging.o postheader.o read.o record.o register.o screen.o sendmsg.o stuff.o talk.o term.o userinfo.o vote.o xyz.o -ltermcap -ldl -lrpcsvc -lbsd -lnsl -lcrypt -L../lib -lBBS
/usr/bin/ld：找不到 -lBBS
collect2: ld 返回 1
make[1]: *** [bbsd] 错误 1
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