$ ../bin/mged -c
BRL-CAD Release 7.10.0   Geometry Editor (MGED)
    Thu Apr 12 15:06:46 EST 2007, Compilation 3
    IriX64@FthrNtr:/home/IriX64/brlcad-7.10.0/brlcad-7.10.0/src/mged

Itcl_Init error Can't find a usable itcl.tcl in the following directories:
    /usr/brlcad-7.10.0/lib/itcl3.2 ./../lib/itcl3.2 ./../library ./../../library
 ./../../itcl/library ./../../../itcl/library
This probably means that Itcl/Tcl weren't installed properly.
If you know where the Itcl library directory was installed,
you can set the environment variable ITCL_LIBRARY to point
to the library directory.

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