Installation of the (source) Tcl/Tk versions
 
1.  Download the files. 
2.  Create a directory (let's say 'pathname/PEP_tcl') in which you 
    would like to install the Tcl/Tk versions.
3.  Put the files in this directory.
4.  Uncompress them with 'gzip -d PEP_t*.tar.gz', 
    obtaining the file 'PEP_t*.tar'.
5.  Untar these file with 'tar -xvf PEP_t*.tar'; 
    two directories 'tcl7.6' and 'tk4.2'
    with several subdirectories are created 
    (make sure no files or directories with one of these names 
    are present before executing this step). 
    Note: If you have GNU tar (for instance, as 'gtar') you may combine steps 4 and 5
    by typing 
          'gtar -xvzf PEP_t*.tar.gz'. 
6.  Change directory to 'tcl7.6/unix'.
7.  If you want to use gcc you have to set the 
    environment variables CC and CPP (we recommend this):
    For c-shell:
    setenv CC gcc
    setenv CPP 'gcc -E'
8.  Execute './configure --prefix pathname/PEP_tcl'.
9.  Execute 'make'.
10. Execute 'make install'.
11. We recommend to change the directories 
    pathname/PEP_tcl/bin, pathname/PEP_tcl/include and pathname/PEP_tcl/lib
    that they look as follows (using `mv' and `ln -s', for
    instance, by `mv tcl.h tcl7.6.h' and `ln -s tcl7.6.h tcl.h'):
       bin:
        tclsh -> tclsh7.6
        tclsh7.6
       include:
        tcl.h -> tcl7.6.h
        tcl7.6.h
       lib:
        libtcl.a -> libtcl7.6.a
        libtcl7.6.a
        tcl -> tcl7.6
        tcl7.6
        tclConfig.sh -> tclConfig7.6.sh
        tclConfig7.6.sh
12. Change directory to 'pathname/PEP_tcl/tk4.2/unix'.
13. Execute './configure --prefix pathname/PEP_tcl'.
14. Execute 'make'.
15. Execute 'make install'.
16. We recommend to change the directories 
    pathname/PEP_tcl/bin, pathname/PEP_tcl/include and pathname/PEP_tcl/lib
    that they now look as follows (using `mv' and `ln -s', note
    that you already made some of these changes):
       bin: 
        tclsh -> tclsh7.6
        tclsh7.6
        wish -> wish4.2
        wish4.2
       include: 
        tcl.h -> tcl7.6.h
        tcl7.6.h
        tk.h -> tk4.2.h
        tk4.2.h
       lib: 
        libtcl.a -> libtcl7.6.a
        libtcl7.6.a
        libtk.a -> libtk4.2.a
        libtk4.2.a
        tcl -> tcl7.6
        tcl7.6
        tclConfig.sh -> tclConfig7.6.sh
        tclConfig7.6.sh
        tk -> tk4.2
        tk4.2
        tkConfig.sh -> tkConfig4.2.sh
        tkConfig4.2.sh

Now you should have installed the correct versions of Tcl and Tk. 
You have to set some environment variables to ensure that
these versions are used:

   If you use 'csh' you can include the following lines in 
   your '.cshrc' file:

      set path = (pathname/PEP_tcl/bin $path)
      setenv TCL_LIBRARY pathname/PEP_tcl/lib/tcl7.6
      setenv TK_LIBRARY pathname/PEP_tcl/lib/tk4.2
 
   and for Solaris you should also set:
  
      setenv  LD_LIBRARY_PATH pathname/PEP_tcl/lib:${LD_LIBRARY_PATH}
   
Now, you can check the version numbers if you invoke a wish 
typing 'wish' at the command line by use of the following two
commands (the correct output is given below):
       puts $tcl_patchLevel
        7.6p2
       puts $tk_patchLevel
        4.2p2

In case of doubt, please ask your system administrator.

Please communicate any problem you experience to: 
'pep_help@informatik.uni-oldenburg.de'.