Problem with GTK build on Mac OS X, help please!

Hello,
I'm having a problem with a GTK build on OS X. I think I have all the 
GTK dependency packages installed correctly. Here's my .mozconfig

. $topsrcdir/browser/config/mozconfig

# Options for 'configure' (same as command-line options).
ac_add_options --enable-default-toolkit=gtk2

ac_add_options --disable-installer
ac_add_options --disable-activex
ac_add_options --disable-activex-scripting
ac_add_options --disable-tests
ac_add_options --enable-strip
ac_add_options --enable-strip-libs
ac_add_options --enable-xterm-updates
ac_add_options --enable-xft

This is the error I get when building. Can someone please shed som light 
on this? Thanks!

make[5]: Entering directory 
`/Users/kev/MozillaSource/gtkfftrunk/mozilla/browser/components/build'
nsModule.cpp
c++ -o nsModule.o -c -DOSTYPE=\"Darwin7.4.0\" -DOSARCH=\"Darwin\" 
-DHAVE_DEPENDENT_LIBS -I./../bookmarks/src -I./../migration/src 
-I./../shell/src  -I../../../dist/include/xpcom 
-I../../../dist/include/string -I../../../dist/include/autocomplete 
-I../../../dist/include/mork -I../../../dist/include/pref 
-I../../../dist/include/rdf -I../../../dist/include/intl 
-I../../../dist/include/uriloader -I../../../dist/include/dom 
-I../../../dist/include/necko -I../../../dist/include/nkcache 
-I../../../dist/include/txmgr -I../../../dist/include/bookmarks 
-I../../../dist/include/migration -I../../../dist/include/shellservice 
-I../../../dist/include/xulapp -I../../../dist/include/browsercomps 
-I../../../dist/include 
-I/Users/kev/MozillaSource/gtkfftrunk/mozilla/dist/include/nspr     -I. 
-I/usr/X11R6/include   -fPIC  -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 -fpascal-strings -no-cpp-precomp 
-fno-common -fshort-wchar -pipe  -DNDEBUG -DTRIMMED -O 
-I/usr/X11R6/include -DMOZILLA_CLIENT -include ../../../mozilla-config.h 
-Wp,-MD,.deps/nsModule.pp nsModule.cpp
rm -f libbrowsercomps.dylib
c++ -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 
-fpascal-strings -no-cpp-precomp -fno-common -fshort-wchar -pipe 
-DNDEBUG -DTRIMMED -O -fPIC -arch ppc -o libbrowsercomps.dylib 
nsModule.o  nsBookmarksService.o nsProfileMigrator.o 
nsBrowserProfileMigratorUtils.o nsNetscapeProfileMigratorBase.o 
nsSeamonkeyProfileMigrator.o nsPhoenixProfileMigrator.o nsINIParser.o 
nsDogbertProfileMigrator.o nsOperaProfileMigrator.o 
nsGNOMEShellService.o     -L../../../dist/bin -L../../../dist/lib 
-lgkgfx ../../../dist/lib/libunicharutil_s.a -L../../../dist/lib 
-lxpcom_compat -L../../../dist/bin -lmozjs -L../../../dist/bin -lxpcom 
-L../../../dist/bin 
-L/Users/kev/MozillaSource/gtkfftrunk/mozilla/dist/lib -lplds4 -lplc4 
-lnspr4 -lpthread   -Wl,-exported_symbols_list 
-Wl,../../../build/unix/gnu-ld-scripts/components-export-list -bundle 
-lm
ld: Undefined symbols:
_g_filename_from_utf8
_g_find_program_in_path
_g_free
_g_object_unref
_g_shell_parse_argv
_g_spawn_async
_g_strfreev
_gdk_pixbuf_add_alpha
_gdk_pixbuf_get_n_channels
_gdk_pixbuf_get_pixels
_gdk_pixbuf_get_rowstride
_gdk_pixbuf_new_from_data
_gdk_pixbuf_save
make[5]: *** [libbrowsercomps.dylib] Error 1
make[5]: Leaving directory 
`/Users/kev/MozillaSource/gtkfftrunk/mozilla/browser/components/build'
make[4]: *** [libs] Error 2
make[4]: Leaving directory 
`/Users/kev/MozillaSource/gtkfftrunk/mozilla/browser/components'
make[3]: *** [libs] Error 2
make[3]: Leaving directory 
`/Users/kev/MozillaSource/gtkfftrunk/mozilla/browser'
make[2]: *** [libs] Error 2
make[2]: Leaving directory `/Users/kev/MozillaSource/gtkfftrunk/mozilla'
make[1]: *** [alldep] Error 2
make[1]: Leaving directory `/Users/kev/MozillaSource/gtkfftrunk/mozilla'
make: *** [alldep] Error 2
make: Leaving directory `/Users/kev/MozillaSource/gtkfftrunk/mozilla'