Undefined symbol "_Unwind_RaiseException"

[Stephen Hurd]

When doing a make test in math/gmp on a Raspberry Pi r244763 after a
successful install, the tests fail with the message:

/usr/lib/libsupc++.so.1: Undefined symbol "_Unwind_RaiseException"

Is this an ABI problem on ARM or a general problem with -CURRENT?

root at pi:/usr/ports/math/gmp/work/gmp-5.0.5 # uname -a
FreeBSD pi 10.0-CURRENT FreeBSD 10.0-CURRENT #4 r244763: Thu Dec 27
19:42:52 PST 2012    
root at stephen.hurd.local:/usr/obj-current/arm.armv6/usr/src-current/sys/RPI-B6 
arm