编译错误（mysql+c)

[root@192 liul]# gcc -o mysql mysql.c -L/home/liul/mysql4/lib/ -lmysqlclient -I
/home/liul/mysql4/include -lm
/home/liul/mysql4/lib//libmysqlclient.a(my_compress.o): In function `my_uncompre
ss':
my_compress.o(.text+0x9a): undefined reference to `uncompress'
/home/liul/mysql4/lib//libmysqlclient.a(my_compress.o): In function `my_compress
_alloc':
my_compress.o(.text+0x12a): undefined reference to `compress'
collect2: ld returned 1 exit status