Log Message:
Turn off optimisation on NetBSD/arm platforms, otherwise we hit an
optimisation loop. The first problem is at:
c++ -c -O2 -fno-rtti -I. -I../emucore -I../emucore/m6502/src    \
-I../emucore/m6502/src/bspf/src -I../ui/x11 -I../ui/sound 	\
-I/usr/X11R6/include -DBSPF_UNIX ../emucore/m6502/src/M6502.cxx

XXX It would probably be best to turn off optimisation on the relevant files