Make sure that /etc/src.conf and /etc/make.conf files are modified to support cc.
It should include something like that:
thanks a lot for your kind answer Viki, i really appreciate that !
finally there's seems a solution to my problem,
but when i try to find src.conf in my /etc ...i found nothing, i mean there's no src.conf so does make.conf.
i think that was a problem caused to the version of my pfsense/bsd machine which didnt same with the driver version from mellanox,
theni reinstall with pfsense 2.2.6 which using freebsd 10.1 ... but it was the same, i found nothing in /etc.
theni reinstall pure freebsd, but it was still the same i found there's no make / src. conf file.
doi need to install something to get that file ?
pardon me and ..
You can manually create it.