thanx for your quick reply.
I've already think about skipping error the way you suggest and it compile correctly ("make") but entering "make install" command i get another error:
===> x11 (install)
===> x11/driver (install)
===> x11/extension (install)
===> x11/bin (install)
===> x11/man (install)
===> doc (install)
ERROR: Failed to load the NVIDIA module!
*** Error code 1
Stop in /usr/local/src/NVIDIA-FreeBSD-x86_64-290.10.
I think is something related to kernel module loading.
in my dmesg i see:
KLD nvidia.ko: depends on kernel - not available or version mismatch
linker_load_file: Unsupported file type
If you think it can help please update the bug with those info.