Vpopmail problem... !!

Jeg har kørt
# ./configure --enable-roaming-users=y --enable-mysql=y
også
#make
men det giver fejlen:

make  all-recursive
make[1]: Entering directory `/root/appsource/vpopmail-5.1.6'
Making all in cdb
make[2]: Entering directory `/root/appsource/vpopmail-5.1.6/cdb'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/root/appsource/vpopmail-5.1.6/cdb'
make[2]: Entering directory `/root/appsource/vpopmail-5.1.6'
gcc  -g -O2 -Wall  -o vchkpw  vchkpw.o libvpopmail.a -L/usr/lib/mysql  -lmysqlclient -lz -lnsl -lcrypt -lz -lm
/usr/bin/ld: cannot find -lmysqlclient
collect2: ld returned 1 exit status
make[2]: *** [vchkpw] Error 1
make[2]: Leaving directory `/root/appsource/vpopmail-5.1.6'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/root/appsource/vpopmail-5.1.6'
make: *** [all-recursive-am] Error 2



Min mysql virker fint....