GNOME3 SPARC64 build update: gobject.c not found.

[Super Bisquit]

$ gdb gnome-panel gnome-panel.core
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This GDB was configured as "sparc64-marcel-freebsd"...(no debugging symbols
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Core was generated by `gnome-panel'.
Program terminated with signal 4, Illegal instruction.
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#0  0x00000000415a3fb4 in copy_classes () from /usr/local/lib/libXi.so.6
(gdb) frame 3
#3  0x0000000043b4bb50 in g_object_newv (object_type=1191814704,
    n_parameters=2, parameters=0x4706e400) at gobject.c:1507
1507    gobject.c: No such file or directory.
    in gobject.c
(gdb)