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X-Authentication-Warning: slinky.cs.nyu.edu: pechtcha owned process doing -bs
Date: Sat, 17 Aug 2002 08:04:04 -0400 (EDT)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: =?X-UNKNOWN?B?5bygIOS6rg==?= <johnsonest AT hotmail DOT com>
cc: cygwin AT cygwin DOT com
Subject: Re: [ECOS] why cygwin does not support "iostream.h"?
In-Reply-To: <1029584809.770.0.camel@hermes.chez-thomas.org>
Message-ID: <Pine.GSO.4.44.0208170757370.21909-100000@slinky.cs.nyu.edu>
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On 17 Aug 2002, Gary Thomas wrote:

> On Sat, 2002-08-17 at 01:03, 张 亮 wrote:
> >
> > hi all,
> >   my c++ code:
> >  #include <iostream.h>
> >   ...
> >
> > cout<<value;
> > ...
> >
> > >gcc classtest.cxx -g -o classtest.exe
> > ld error:
> >  undefined reference to "cout" and operator "<<"
> >
> > how to get iostream's support?
> >
>
> This would be better asked on the CygWin list :-)

This would be better asked on the GCC list :-p

I believe this is in the gcc FAQ.  However, it's been asked often enough
on this list, so here's an answer for the archives:

gcc uses the file extension to determine the language.  Any extension it
doesn't recognize is assumed to be a C file.  The default extension for a
C++ file is ".C".  gcc does not recognize ".cxx", which is used by
Microsoft compilers, I think.  It is, of course, possible to tell gcc to
treat a ".cxx" file as a C++ file.  In case you don't want to mess with
the gcc configuration, use either the "-x c++" option of gcc, or simply
call g++.
	Igor
-- 
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