mysql41-server ports בעיה

[Tomer]

אהלן, אני מנסה להתקין mysql41-server דרך /usr/ports במערכת fbsd, ואני מקבל את השגיאה:

/var/tmp//cci7Sr17.o: In function `thr_alarm':
/var/tmp//cci7Sr17.o(.text+0x353): undefined reference to `pthread_equal'
/var/tmp//cci7Sr17.o(.text+0x376): undefined reference to `pthread_kill'
/var/tmp//cci7Sr17.o: In function `process_alarm_part2':
/var/tmp//cci7Sr17.o(.text+0x590): undefined reference to `pthread_equal'
/var/tmp//cci7Sr17.o(.text+0x5a7): undefined reference to `pthread_kill'
/var/tmp//cci7Sr17.o(.text+0x647): undefined reference to `pthread_equal'
/var/tmp//cci7Sr17.o(.text+0x65e): undefined reference to `pthread_kill'
/var/tmp//cci7Sr17.o: In function `end_thr_alarm':
/var/tmp//cci7Sr17.o(.text+0x74f): undefined reference to `pthread_equal'
/var/tmp//cci7Sr17.o(.text+0x776): undefined reference to `pthread_kill'
/var/tmp//cci7Sr17.o(.text+0x7d4): undefined reference to `pthread_cond_timedwait'
/var/tmp//cci7Sr17.o: In function `thr_alarm_kill':
/var/tmp//cci7Sr17.o(.text+0x8a4): undefined reference to `pthread_equal'
/var/tmp//cci7Sr17.o(.text+0x8e3): undefined reference to `pthread_kill'
/var/tmp//cci7Sr17.o: In function `main':
/var/tmp//cci7Sr17.o(.text+0x10c0): undefined reference to `pthread_attr_init'
/var/tmp//cci7Sr17.o(.text+0x10d3): undefined reference to `pthread_attr_setscope'
/var/tmp//cci7Sr17.o(.text+0x10e6): undefined reference to `pthread_attr_setdetachstate'
/var/tmp//cci7Sr17.o(.text+0x10f9): undefined reference to `pthread_attr_setstacksize'
/var/tmp//cci7Sr17.o(.text+0x1127): undefined reference to `pthread_create'
/var/tmp//cci7Sr17.o(.text+0x1166): undefined reference to `pthread_attr_setscope'
/var/tmp//cci7Sr17.o(.text+0x11c6): undefined reference to `pthread_create'
/var/tmp//cci7Sr17.o(.text+0x120f): undefined reference to `pthread_attr_destroy'
libmysys.a(my_pthread.o): In function `my_pthread_getprio':
my_pthread.o(.text+0x1b): undefined reference to `pthread_getschedparam'
libmysys.a(my_pthread.o): In function `my_pthread_attr_setprio':
my_pthread.o(.text+0x4a): undefined reference to `pthread_attr_setschedparam'
*** Error code 1

Stop in /usr/ports/databases/mysql41-server/work/mysql-4.1.16/mysys.
*** Error code 1

Stop in /usr/ports/databases/mysql41-server/work/mysql-4.1.16.
*** Error code 1

Stop in /usr/ports/databases/mysql41-server/work/mysql-4.1.16.
*** Error code 1

Stop in /usr/ports/databases/mysql41-server.

אני לא מבין למה זה קורה, וזה קורה בכל הגרסאות שניסיתי (40, 41, 50)

מה אפשר לעשות?