September 2002
Beginner to intermediate
216 pages
7h 43m
English
Content preview from Mac OS X for Unix GeeksBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Compiler Differences
GCC is supported on a wide range of platforms and is familiar to most Unix developers. A natural consequence of this is that most Unix developers will find a familiar development environment in Mac OS X. There are, however, some important differences.
One difference that experienced GCC users may notice, particularly if they have dealt with a lot of mathematical and scientific programming, is that Mac OS X’s Developer Tools do not include FORTRAN. However, the Fink distribution (http://fink.sourceforge.net) includes g77 , the GNU FORTRAN ’77 compiler. Also, the Darwin archive includes the source code for g77, which you can use to compile FORTRAN code. For more information on the Darwin CVS archive, see Chapter 7.
Tip
Mac OS X’s C compiler contains a number of Mac OS X-specific features that have not been folded into the main GCC distribution. (It is up to the Free Software Foundation (FSF) to accept and merge Apple’s patches.) For information on how Apple’s compiler differs from the GNU version, see the README.Apple file in the Darwin CVS archive’s gcc3 subdirectory.
As of this writing, Apple’s cc compiler is based on GCC 3.1. However, GCC 2.95 is also available as /usr/bin/gcc2. By default, invoking cc or gcc will invoke GCC 3.1. You can change this to GCC 2.95 by running the command gcc_select 2, and you can change it back with gcc_select 3. You can see the current settings by running gcc_select with no arguments:
% gcc_select Apple Computer, Inc. GCC ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.