When the environment variable '''TCL_LIBRARY'''
is defined, Tcl's default initialization sequence
takes its value to be a filesystem directory in
which the '''init.tcl''' file should be sought first.
In a proper Tcl installation, use of this environment
variable should not be needed.  The main use for it
is in Tcl's own build and test procedures to direct
initialization of a freshly built Tcl program so that
it can be tested before it is installed.  Other than
that, it should be considered a tool for "last-resort"
workarounds of broken installations, not a tool for
routine use.
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See also [magic names]

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[[[Category Tutorial]]]