FreeBSD build dies with signal 9

[father]

make  all-recursive
Making all in python
make  all-recursive
Making all in docs
/bin/sh ../libtool  --tag=CXX   --mode=compile g++ -DHAVE_CONFIG_H -I. -I..  -I/usr/local/include/python2.5  -fno-strict-aliasing -Wall -Wno-unused -Wno-uninitialized -fvisibility=hidden -I/usr/local/include -g -O2 -MT xapian_wrap.lo -MD -MP -MF .deps/xapian_wrap.Tpo -c -o xapian_wrap.lo `test -f 'modern/xapian_wrap.cc' || echo './'`modern/xapian_wrap.cc
mkdir .libs
 g++ -DHAVE_CONFIG_H -I. -I.. -I/usr/local/include/python2.5 -fno-strict-aliasing -Wall -Wno-unused -Wno-uninitialized -fvisibility=hidden -I/usr/local/include -g -O2 -MT xapian_wrap.lo -MD -MP -MF .deps/xapian_wrap.Tpo -c modern/xapian_wrap.cc  -fPIC -DPIC -o .libs/xapian_wrap.o
g++: Internal error: Killed: 9 (program cc1plus)
Please submit a full bug report.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
*** Error code 1

Stop in /home/father/data/optpilot/dist/xapian-bindings-1.0.23/python.
*** Error code 1

Stop in /home/father/data/optpilot/dist/xapian-bindings-1.0.23/python.
*** Error code 1

Stop in /home/father/data/optpilot/dist/xapian-bindings-1.0.23/python.
*** Error code 1

Stop in /home/father/data/optpilot/dist/xapian-bindings-1.0.23.
*** Error code 1

Stop in /home/father/data/optpilot/dist/xapian-bindings-1.0.23.

[Olly Betts]

This doesn't appear to be a bug in Xapian.

Your compiler is dying with an internal error due to receiving signal 9, which is SIGKILL. So it looks like another user or a system process decided to kill your compile. Most likely you ran out of memory:

​http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40217

I'd check you have enough swap space configured.