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Re: trigraphs ????
- To: Michael Meissner <meissner at cygnus dot com>
- Subject: Re: trigraphs ????
- From: "Zack Weinberg" <zackw at stanford dot edu>
- Date: Thu, 5 Jul 2001 10:45:08 -0700
- Cc: Aparna Ranish <aparna_ranish at rediffmail dot com>, "gcc-help at gcc dot gnu dot org" <gcc-help at gcc dot gnu dot org>, "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
On Thu, Jul 05, 2001 at 12:39:57PM -0400, Michael Meissner wrote:
> On Thu, Jul 05, 2001 at 07:15:53AM -0000, Aparna Ranish wrote:
> > Hi
> > Can somebody tell me what is the usage of trigraphs ??? Is it supported by
> > all the Compilers.
>
> It is required to be supported by all ISO standard compilers. The
> usage of trigraphs is to work around problems where some characters
> in the C source character set aren't available in the local
> character set (ie, some varients of ISO 646 in other countries use
> the same byte value for curley braces and other characters).
However, note that trigraphs are disabled by default in GNU C/C++/ObjC.
To enable them, you must use a command line switch: any of -trigraphs,
-ansi, -std=c89, -std=c99, -std=c++98 will do the trick. The latter
four have other effects as well.
--
zw You have to care about the 'fair trial' part; you have to care about
the 'due process of law' part, and you have to care about these things
*more* than you care about putting child molestors away.
-- Graydon Saunders