[Exim] Installation error (make)

Hello,

I'm building an email server with Exim 3.16 - I have already built exim (3.03) but never with Mysql.

I have configured my Makefile, etc... to support Mysql and I get the error message (put at the end of this email) after the 'make' command.
If I run 'make' without the Mysql supported, it works. Mysql is already running on my Slackware 7 machine. Any idea??

cheers
Guillaume

lookups/lookups.a(mysql.o): In function `mysql_tidy':

mysql.o(.text+0x38): undefined reference to `mysql_close'

lookups/lookups.a(mysql.o): In function `perform_mysql_search':

mysql.o(.text+0x198): undefined reference to `mysql_init'

mysql.o(.text+0x1b2): undefined reference to `mysql_real_connect'

mysql.o(.text+0x25f): undefined reference to `mysql_query'

mysql.o(.text+0x27a): undefined reference to `mysql_use_result'

mysql.o(.text+0x2cd): undefined reference to `mysql_fetch_lengths'

mysql.o(.text+0x484): undefined reference to `mysql_fetch_row'

mysql.o(.text+0x4be): undefined reference to `mysql_free_result'

collect2: ld returned 1 exit status

make[1]: *** [exim] Error 1

make[1]: Leaving directory `/usr/local/exim-3.16/build-Linux-i386'

make: *** [go] Error 2