Notes for compiling and running e93 under Apple OS X.

X11
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Install Apple's X11 for Mac OS X.

DVD installer disk or
http://www.apple.com/downloads/macosx/apple/x11formacosx.html

Tcl/Tk
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The Tcl/Tk that Apple includes with OS X will not work for X11-based
apps because it was made for Aqua. You must download and compil e
Tcl/Tk for X11. It will be installed in an alternate path so as to not
conflict with Aqua Tcl/Tk.

Download Tcl and Tk source packages from http://tcl.tk.

Compile and install:
  % tar xzf tcl8.4.10-src.tar.gz
  % tar xzf tk8.4.10-src.tar.gz
  % cd tcl8.4.10/unix
  % ./configure --prefix=/usr/X11R6 --x-includes=/usr/X11R6/include --x-libraries=/usr/X11R6/lib --enable-threads
  % make
  % sudo make install
  % cd ../../tk8.4.10/unix
  % ./configure --prefix=/usr/X11R6 --enable-threads --with-x --with-tcl=/usr/X11R6/lib
  % make
  % sudo make install

e93
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The e93 Makefile needs to be modified to link with our newly compiled
Tcl/Tk libraries instead of the default Apple libraries.

In machdef.mk, change TCL_LIB to:
        TCL_LIB=-L/usr/X11R6/lib
and uncomment/add:
        TCL_VERSION=8.4

Compile and install:
  % make
  % sudo make install-strip

=======================
NOTE: from Andrew Pines:
"sudo make install-strip" failed on mine because it got confused by  
the file INSTALL.  Either rename INSTALL to INSTALL.TXT or add this  
line to the Makefile:
        .PHONY: install
=======================

.Xmodmap
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Apple's version of X11 comes with a default keymap that swaps the
modifier keys so that X11 shortcuts won't interfere with OS X
shortcuts. To put the modifier keys back to the way they should be,
first create '.Xmodmap' in your home directory. Add the following
lines to this file:

clear Mod1
clear Mod2
keycode 63 = Alt_L
keycode 66 = Meta_L
add Mod1 = Alt_L
add Mod2 = Meta_L

Start X11 and select 'Preferences'. Under 'Input' make sure all the
options are unchecked. You must restart X11 after making these
changes. Now the Alt/Command key works the wa y e93 expects it to.