Following is the tail end of what happens when I try to make
mail/thunderbird.  This is with 2006Q1 on NetBSD/i386-1.6.1.
I can provide work.log and config.log contents if that would
help.  For the time being, I'll try dragging pkgsrc and my
distfiles across to a NetBSD/i386-2.1 machine, in case that
helps.

- Andy Ball

make[4]: Entering directory
/usr/src/pkgsrc/mail/thunderbird/work/mozilla/gfx/src/ps'
nsDeviceContextPS.cpp
c++ -o nsDeviceContextPS.o -c  -DMOZILLA_INTERNAL_API -DOSTYPE=\"NetBSD1.6\"
-DOSARCH=\"NetBSD\" -DBUILD_ID=0000000000 -I../.. -I./..  -I./../shared
-I../../../dist/include/xpcom -I../../../dist/include/string
-I../../../dist/include/widget -I../../../dist/include/pref
-I../../../dist/include/caps -I../../../dist/include/locale
-I../../../dist/include/uconv -I../../../dist/include/view -I../../../
dist/include/necko -I../../../dist/include/imglib2
-I../../../dist/include/unicharutil -I../../../dist/include/gfx
-I../../../dist/include -I../../../dist/include/nspr -I/usr/pkg/include
-I/usr/pkg/include  -I../../../dist/sdk/include -I/usr/pkg/include
-I/usr/pkg/include/freetype2 -I/usr/X11R6/include   -I/usr/X11R6/include
-fPIC -DPIC  -I/usr/pkg/include -I/usr/include -DGLX_GLXEXT_LEGACY
-I/usr/pkg/include/freetype2  -I/usr/X11R6/include -fno-rtti -fno-exceptions
-Wall -Wconversion -Wpointer-arith -Wcast-align -Woverloaded-virtual -Wsynth
-Wno-ctor-dtor-privacy -Wno-non-virtual-dtor -Wno-long-long -O2 -march=k6
-I/usr/pkg/include -I/usr/include -DGLX_GLXEXT_LEGACY
-I/usr/pkg/include/freetype2 -march=k6 -Dunix -pipe  -DNDEBUG -DTRIMMED -O2
-I/usr/pkg/include/gtk-2.0 -I/usr/pkg/lib/gtk-2.0/include
-I/usr/pkg/include/atk-1.0 -I/usr/pkg/include/cairo
-I/usr/pkg/include/pango-1.0 -I/usr/pkg/include/glib/glib-2.0
-I/usr/pkg/lib/glib-2.0/include -I/usr/pkg/include
-I/usr/pkg/include/freetype2    -I/usr/pkg/include -I/usr/include
-DGLX_GLXEXT_LEGACY -I/usr/pkg/include/freetype2  -I/usr/X11R6/include
-DMOZILLA_CLIENT -include ../../../mozilla-config.h
-Wp,-MD,.deps/nsDeviceContextPS.pp nsDeviceContextPS.cpp
In file included from nsDeviceContextPS.h:50,
                 from nsDeviceContextPS.cpp:55:
nsFontMetricsPS.h:285: ANSI C++ forbids data member F_ontps' with same name
as enclosing class
make[4]: *** [nsDeviceContextPS.o] Error 1
make[4]: Leaving directory
/usr/src/pkgsrc/mail/thunderbird/work/mozilla/gfx/src/ps'
make[3]: *** [libs] Error 2
make[3]: Leaving directory
/usr/src/pkgsrc/mail/thunderbird/work/mozilla/gfx/src'
make[2]: *** [libs] Error 2
make[2]: Leaving directory
/usr/src/pkgsrc/mail/thunderbird/work/mozilla/gfx'
make[1]: *** [tier_9] Error 2
make[1]: Leaving directory /usr/src/pkgsrc/mail/thunderbird/work/mozilla'
gmake: *** [default] Error 2
*** Error code 2

Stop.
make: stopped in /usr/src/pkgsrc/mail/thunderbird
===> 
===> There was an error during the `build'' phase.
===> Please investigate the following for more information:
===>      * log of the build
===>      * /usr/src/pkgsrc/mail/thunderbird/work/.work.log
===> 
*** Error code 1

Stop.
make: stopped in /usr/src/pkgsrc/mail/thunderbird
almond#