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#   @(#) README (Yale) version 1.3 2/5/91

Release notes:
---------------------------------------------------------------
8/27/03: PostScript documentation collected into a single
    file and page headers updated to work with GhostScript.

8/26/03: TimberWolf-6.1: Ported to Linux (Tim Edwards)
    This is currently the default compilation.
    There is a corresponding file pgms/ymake/linux.macro
    which has already been copied to Ymake.macro

7/21/06: TimberWolf-6.2: Revised all calls to varargs to
    use stdargs instead, for $#@! gcc compatibility.
    Also, moved the detailed router "mighty" (TimberWolfDR)
    from the "yale-only install" to the standard set.

5/4/11: TimberWolf-6.3: Made a significant number of changes
    to make a clean compile on a 64-bit system.  Includes
    one serious bug fix of a malloc error causing an out-of-
    bounds array access.
---------------------------------------------------------------

Shortened install instructions for the highly impatient:

   1)  source .twrc
   2)  make Makefiles
   3)  make install_non_yale

   If the system is non-Linux or something non-standard,
   check the definitions in pgms/ymake/Ymake.macro file.
   In particular, 64-bit systems may need to copy
   pgms/ymake/linux64.macro to pgms/ymake/Ymake.macro,
   as it links to the X11 libraries in lib64.

   Everything is made in local directories and linked to
   the "bin" subdirectory.  Running TimberWolf requires
   first always sourcing the contents of .twrc *in the
   source directory*.  e.g.,

     pushd /usr/local/src/timberwolf-6.2 ; source .twrc ; popd

   and ensuring that the executables are in your search path:

     setenv PATH "${PATH}:/usr/local/src/timberwolf-6.2/bin"
  
   after which you can run:

     TimberWolf <project_name>
     
---------------------------------------------------------------

Notes on compiling and porting TimberWolf.  These notes are from
the original TimberWolf-6.0 release (1992).

The TimberWolf system has documentation in PostScript format
for printing and online help.  File is TimberWolf/doc/TimberWolf.ps.

1.  The TimberWolf system makes extensive use of the make utility.
    Correctly constructing Timberwolf without using make is possible
    but not without considerable difficulty.  TimberWolf allows the
    uses to change various parameters which may vary from machine to
    machine. There is an csh script called ymake in the directory
    ./TimberWolf/pgms/ymake which converts a machine independent
    makefile template (the Ymakefile) into a makefile in each of the
    source directories.  This awk program uses the file Ymake.macro
    in this directory to include and redefine the names and paths
    of programs and files used by make.  For example, if the
    user wanted to change to a different compiler, say gcc, we
    would enter CC=gcc in the Ymake.macro files.  We furnish macro
    files for some of the popular machines.  Just rename these 
    files to Ymake.macro to use them.

2.  We no longer use yacc and lex on foreign machines due to
    differences between implementations.  Instead, we furnish
    only the resultant c files.

3.  The TimberWolf system uses an library archive containing frequently
    used utility functions.  Most of the programs need to link to 
    this library. It is important that this library be compiled correctly
    for any of the following steps of the make process to work correctly.
    The source for the library is in ./TimberWolf/pgms/Ylib/lib.

3.  The TimberWolf system requires two environment variables to 
    function properly. The environment variable TWDIR specifies
    where the TimberWolf code resides.  ALWAYS Set the 
    environment variable TWDIR to the full pathname of the TimberWolf
    root directory before installation or execution.  For example, 
    type 'setenv TWDIR /home/john/TimberWolf' if the TimberWolf 
    tape was read into the /home/john directory.  

    The environment variable DATADIR is the pathname of a 
    directory of where graphic dump files will be stored.  
    
    A convenience csh script has been furnished to initialize
    the environment variable.  Set the current working directory
    to the TimberWolf root directory and type
	source .twrc 
    Both environment variables will be set and the root directory
    will be added to your search path.

4.  After reading the tape, proceed to the ./TimberWolf/pgms/ymake 
    directory to inspect the Ymake.macro file.  Make changes as needed.
    If no changes need to be made to this file, the following ymake step
    is not necessary.  Make sure set the environment variable TWDIR has
    been set.  Next, go to the TimberWolf root directory - ./TimberWolf.
    Type 'make Makefiles' to update all the Makefiles from Ymakefiles.
    Note:If you don't have awk, you will need to edit all subdirectory
    Makefiles.  Ymake is a shell script that call the makedepend program
    to add program dependencies into the Makefile.  If makedepend
    gives you problems you may avoid calling makedepend by changing 
    the Ymake.macro file.  (Call ymake with argument 'nodepend' ). See the
    file for details. The penalty is inaccuracy with respect to include
    file dependencies.  If you are building the entire system, this
    will not matter.  
    
5.  Now we are ready to compile and link the system.
    Type "make install_non_yale". This will first create the utility
    archive in the ./TimberWolf/pgms/Ylib/lib directory.  Since
    TimberWolf is able to use XWindows, this makefile looks to see if
    the XWindow version 11 include directory exists.  If it does exist,
    then it is assumed that X11 is installed on your system.  If X11
    does exist on your system but not in this directory, the easier fix
    is to create a link in /usr/include to point to the correct location.
    See makefile in that directory for details.  Next the makefile will
    compile and link the TimberWolf programs. Remember, if you do not use
    the non_yale dependencies you will encounter difficulties.

6.  TimberWolf makes heavy use of X graphics although it may be
    turned off.  We therefore supply a sample portion of the .Xdefaults
    file for the TimberWolf system.  It may be found in 
    ./TimberWolf/defaults/.Xdefaults.

7.  Once TimberWolf is compiled and linked, go to the ./test directory.
    Two examples are given.  You should be able to run either example
    to completion.

8.  The makefile also contains two useful utility functions - delpgms
    and production.  Make delpgms deletes all the program  - useful to 
    begin the make process.  Make production strips all the debug
    information from the program.

9.  Beware of problems with the Xserver on the Sun.  The default
    server has bugs.  You should be running the X11R3 server with
    Purdue fixes or the X11R4 server.  Let us know if you have 
    any problems.

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