While building latest pkgsrc/www/mozilla:

c++ -o nsBinaryStream.o -c -DOSTYPE=\"NetBSD1\" -DOSARCH=\"NetBSD\" -DOJI -D_IMPL_NS_COM  -I../../dist/include/string -I../../dist/include/xpcom -I../../dist/include -I/usr/pkgsrc/www/mozilla/work/mozilla/dist/include/nspr -I/usr/pkg/include -I/usr/pkg/include   -I/usr/X11R6/include   -fPIC -DPIC  -I/usr/X11R6/include/gdk-pixbuf-1.0  -I/usr/pkg/include -I/usr/X11R6/include  -I/usr/X11R6/include -fno-rtti -fno-exceptions -Wall -Wconversion -Wpointer-arith -Wcast-align -Woverloaded-virtual -Wsynth -Wno-ctor-dtor-privacy -pedantic -Wno-long-long -O -ffixed-g4 -I/usr/pkg/include -I/usr/X11R6/include -Dunix -pthread -pipe  -DNDEBUG -DTRIMMED -O2  -I/usr/X11R6/include/gdk-pixbuf-1.0  -I/usr/pkg/include -I/usr/X11R6/include  -I/usr/X11R6/include -DMOZILLA_CLIENT -include ../../mozilla-config.h -Wp,-MD,.deps/nsBinaryStream.pp nsBinaryStream.cpp
nsBinaryStream.cpp: In method `nsresult nsBinaryOutputStream::WriteFloat(float)':
nsBinaryStream.cpp:150: Internal compiler error in `create_reg_dead_note', at haifa-sched.c:4496
Please submit a full bug report.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
cpp0: output pipe has been closed
gmake[3]: *** [nsBinaryStream.o] Error 1
gmake[3]: Leaving directory
`/usr/pkgsrc/www/mozilla/work/mozilla/xpcom/io'

NetBSD 1.6T (GENERIC) #4: Thu May 22 14:41:10 BST 2003
        sketch@munkeh.intra.nut:/usr/obj/sys/arch/sparc64/compile/GENERIC
total memory = 1280 MB
avail memory = 1175 MB
using 8204 buffers containing 65632 KB of memory
bootpath: /sbus@1f,0/SUNW,fas@e,8800000/sd@0,0
mainbus0 (root): SUNW,Ultra-2
cpu0 at mainbus0: SUNW,UltraSPARC-II @ 295.979 MHz, version 0 FPU
cpu0: 32K instruction (32 b/l), 16K data (32 b/l), 2048K external (64 b/l)

Hopefully that's of use to somebody.

-- 
Jonathan Perkin - http://www.perkin.org.uk/jonathan/