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X-Authentication-Warning: slinky.cs.nyu.edu: pechtcha owned process doing -bs
Date: Mon, 15 Sep 2003 19:53:53 -0400 (EDT)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: Vijay Kumar <janjanam AT yahoo DOT com>
cc: cygwin AT cygwin DOT com
Subject: Re: g++ iostream broken on windows 2000
In-Reply-To: <20030915234312.66294.qmail@web40708.mail.yahoo.com>
Message-ID: <Pine.GSO.4.56.0309151948020.12411@slinky.cs.nyu.edu>
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On Mon, 15 Sep 2003, Vijay Kumar wrote:

> Hi all,
>
> I have upgraded to the latest cygwin this morning and
> I can not anymore run my programs that use ifstream to
> read input files. It crashes giving segmentation
> fault. When I ran strace, I found that the actually
> fails in mmap.cc complaining STATUS_ACCESS_VIOLATION.
>
> Here's the simple code I ran. Anybody have any clues?
> Interestingly the following programs works fine with
> -mno-cygwin option which unfortunaty I can not use for
> my application.
>
> # include <iostream>
> # include <fstream>
>
> int main(int argc, char *argv[])
> {
>    char ch;
>
>    if (argc < 2)
>    {
>       cout << "Usage: a.out file_name" << endl;
>    }
>
>    ifstream is(argv[1], ios::in);
>
>    while (! is.eof())
>    {
>        is.get(ch);
>        cout << ch;
>    }
>    is.close();
>
>    return 0;
> }
>
> Thanks,
> - Vijay

Vijay,

Please (re)read <http://cygwin.com/problems.html>, especially the part
about attaching (as an uncompressed text *attachment*) the output of
"cygcheck -svr".  FYI, you must be using the earlier version of g++ as
well, since g++ 3.2 complains on compiling your program (you need to
insert "using namespace std;" before main() for it to compile).

FWIW, your program works just fine on Cygwin 1.5.3-1 (as a datapoint).  I
didn't install 1.5.4 yet, so can't try reproducing it there.
	Igor
-- 
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