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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<TITLE>Icon on Macintosh</TITLE>
<LINK rel="STYLESHEET" type="text/css" href="istyle.css">
<LINK rel="SHORTCUT ICON" href="shortcut.gif">
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<BODY>
<P><A href="http://www.cs.arizona.edu/icon/">
<IMG src= "wwwcube.gif" alt="[Icon home]"
width="128" height="144" border="0" align="right"></A></P>
<H1>Icon on Macintosh</H1>
<P>Gregg M. Townsend<BR>
<SMALL>Department of Computer Science</SMALL><BR>
<SMALL>The University of Arizona</SMALL></P>
<P><SMALL>www.cs.arizona.edu/icon/v943/macintosh.htm<BR>
Last updated November 9, 2005</SMALL>
<!-- $Id: macintosh.htm,v 1.1 2005/11/09 18:03:59 gmt Exp $ --></P>
<H2>Introduction</H2>
<P>Because Mac OS X is based on Unix, it can run Icon. There is
no special Macintosh interface, so as a practical matter Icon on
the Mac is for those who are comfortable using a Unix shell in a
Terminal window.</P>
<P>The command-line interface to Icon is described by Unix
<CITE>man</CITE> pages. The <CODE><A href=
"icon.txt">icon</A></CODE> command executes a program from a
single source file. An Icon program in a simple text file
<CODE>prog.icn</CODE> is executed by typing <CODE>icon
prog.icn</CODE>. The more general <CODE><A href=
"icont.txt">icont</A></CODE> command, modeled after the Unix
<CITE>cc</CITE> command, supports multiple files, separate
compilation, and other features.</P>
<H2>Graphics</H2>
<P>For graphics, Icon uses the X Window System, generally called
<A href="http://www.apple.com/macosx/features/x11/">X11</A> in
Macintosh documentation. X11 is not normally installed as part of
OS X; it must be selected as part of a custom installation.
Alternatively, it can be
<A HREF="http://www.apple.com/support/downloads/x11formacosx.html">
downloaded</A> from Apple.</P>
<P>The X window system does not start automatically. To run an
Icon graphics program, you must first start the X11 application
and leave it running. The environment variable DISPLAY must be
set in the shell that runs an Icon graphics program. For
example:</P>
<BLOCKQUOTE>
<P><CODE>setenv DISPLAY :0.0</CODE></P>
</BLOCKQUOTE>
<H2>Building Icon</H2>
<P>Building Icon from source requires the <A href=
"http://www.apple.com/macosx/features/xcode/">Xcode</A> toolbox.
This comes in an extra folder on the OS X installation disc.
When installing XCode, be sure to select a custom
installation and add X11 to the default set.</P>
<P>Icon is built in a Terminal window. The process is the same as
on other platforms and uses the configuration named
<CODE>macintosh</CODE>. See
<A href="build.htm">Building Icon</A> for detailed instructions.</P>
<BLOCKQUOTE>
</BLOCKQUOTE>
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