Problem med mysql-stöd i PHP

./configure --with-apxs2=/www/bin/apxs --with-mysql=/usr/local/mysql

checking for MySQL support... yes
checking for specified location of the MySQL UNIX socket... 
no
checking for MySQL UNIX socket location... /tmp/mysql.sock
checking for mysql_close in -lmysqlclient... no
checking for mysql_error in -lmysqlclient... no
configure: error: mysql configure failed. Please check 
config.log for more information.

configure:57738: checking for MySQL support
configure:57784: checking for specified location of the MySQL UNIX socket
configure:57841: checking for MySQL UNIX socket location
configure:58031: checking for mysql_close in -lmysqlclient
configure:58050: gcc -o conftest -I/usr/include -g -O2  -L/usr/lib  conftest.c -lmysqlclient  -lz -lresolv -lm -ldl -lnsl  -lxml2 -lz -lm -lxml2 -lz -lm 1>&5
/usr/lib/gcc/i486-slackware-linux/3.4.6/../../../../i486-slackware-linux/bin/ld: cannot find -lmysqlclient
collect2: ld returned 1 exit status
configure: failed program was:
#line 58039 "configure"
#include "confdefs.h"
/* Override any gcc2 internal prototype to avoid an error.  */
/* We use char because int might match the return type of a gcc2
    builtin and then its argument prototype would still apply.  */
char mysql_close();

int main() {
mysql_close()
; return 0; }
configure:58271: checking for mysql_error in -lmysqlclient
configure:58290: gcc -o conftest -I/usr/include -g -O2  -L/usr/lib  -Wl,-rpath,/usr -L/usr conftest.c -lmysqlclient  -lz -lz -lresolv -lm -ldl -lnsl  -lxml2 -lz -lm -lxml2 -lz -lm 1>&5
/usr/lib/gcc/i486-slackware-linux/3.4.6/../../../../i486-slackware-linux/bin/ld: cannot find -lmysqlclient
collect2: ld returned 1 exit status
configure: failed program was:
#line 58279 "configure"
#include "confdefs.h"
/* Override any gcc2 internal prototype to avoid an error.  */
/* We use char because int might match the return type of a gcc2
    builtin and then its argument prototype would still apply.  */
char mysql_error();

int main() {
mysql_error()
; return 0; }