用于流程管理的Makefile错误

Question

当我编译Makefile进行流程管理时，出现以下错误。目录中也存在liblab1.a文件。

Compiling server.c

/usr/bin/ld: skipping incompatible ./liblab1.a when searching for -llab1
/usr/bin/ld: cannot find -llab1
/usr/bin/ld: cannot find -lsocket
collect2: error: ld returned 1 exit status
Makefile:8: recipe for target 'server' failed
make: *** [server] Error 1

这是我的Makefile。尽管liblab1.a已放置在文件夹中，但这似乎是某些缺少库文件的结果。

# Makefile for the lab assignment
# You are NOT supposed to modify this
# file.

all: server simplefork crack server1 server2
 // server.c compilation
server: server.c netstuff.h liblab1.a
    @echo "Compiling server.c"
    @gcc -Wall -Werror -o server server.c -L. -llab1 -lnsl -lsocket