Purpose: to contain discussion relating to an installation directory structure that is recommended for people writing tcl extensions or applications.

LV Jump right in and add info as you see needed:

--prefix /usr/local default location for tcl pieces

                        /include        header file(s) needed when writing code
                                                against a library

                        /lib            location where Tcl only extensions are
                                                installed
                        /lib/extension.version.level
                                        location for pkgIndex.tcl files, tcl 
                                                files, etc.
                        /bin            location where Tcl only applications
                                                are installed

--exec-prefix /usr/local default location for binary parts of

                                                tcl

                        /lib            location where binary extensions
                                                and their pkgIndex.tcl are
                                                installed
                        /lib/extension.version.level
                                        location for pkgIndex.tcl files, .so 
                                                files, etc.
                        /bin            location where binary applications
                                                are installed