FreeBSD 11 beta4, board Raspberry 2, armv6.
Zebra process falls ("Abort trap") when start after compiling with system clang. When compiling with gcc (gcc-5.3/5.4) is working properly, ospfd/ospf6d/bgpd also start properly.
Small research showed that bug may be around reading/installation routes in the kernel.
It seems to work when compiled with WITH_DEBUG=yes