Global variables defined in the Tcl library

The following global variables are defined or used by the procedures in the Tcl library:

auto_execs

Used by auto_execok to record information about whether particular commands exist as executable files.

auto_index

Used by auto_load to save the index information read from disk.

auto_noexec

If set to any value, then unknown will not attempt to auto-exec any commands.

auto_noload

If set to any value, then unknown will not attempt to auto-load any commands.

auto_path

If set, then it must contain a valid Tcl list giving directories to search during auto-load operations.

env(TCL_LIBRARY)

If set, then it specifies the location of the directory containing library scripts (the value of this variable will be returned by the command info library). If this variable isn't set then a default value is used.

env(TCLLIBPATH)

If set, then it must contain a valid Tcl list giving directories to search during auto-load operations. This variable is only used if auto_path is not defined.

unknown_active

This variable is set by unknown to indicate that it is active. It is used to detect errors where unknown recurses on itself infinitely. The variable is unset before unknown returns.