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Date: Thu, 23 Apr 2009 17:32:32 -0400
From: "Larry Hall (Cygwin)" <reply-to-list-only-lh AT cygwin DOT com>
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Subject: Re: C++ program produces no output (g++ 4.3.2, cygwin 1.7)
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Eric Lilja wrote:
> Hi, attached is the source for a C++ program (with a Makefile) that 
> produces no output when run (I tried redirecting stdout, that didn't 
> work either). I'm running Cygwin 1.7 on a Vista32 machine, Cygwin was 
> just updated.
> The code was written september 2007 and then it ran and displayed its 
> output just fine. It's a simple AVL Tree with a small test program.
> I'm using g++ 4.3.2. Something seems to be up with cygcheck too, because 
> I have attached the wierd looking output it gave me (and it took a while 
> for it to complete as well).
> 
> Maybe someone could try the program I attached and see if they get the 
> same problems as me?
> 
> I don't know how to use gdb, but I did try running my code under gdb, 
> here's what I got:
> $ gdb testavl.exe
> GNU gdb 6.8.0.20080328-cvs (cygwin-special)
> Copyright (C) 2008 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later 
> <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "i686-pc-cygwin"...
> (gdb) run
> Starting program: /cygdrive/c/coding/kurser/tddi01/avl_tree/testavl.exe
> [New thread 3568.0xe70]
> 
> Program exited with code 030000000005.
> You can't do that without a process to debug.
> (gdb)
> 
> main() is in the file avl_tree-test.cc (notice the large block of code 
> that has been if 0:ed out in that file).
> Also notice the cout first in main() which should be displayed even if 
> the program crashes as soon as it tries to instantiate AVL_Tree<int>.
> 
> Since this used to work and I haven't touched code I thought I might ask 
> for advice here, since I'm using an upgraded compiler and the cygwin 1.7 
> test release.
> 
> I tried the program under mintty and takecommand, same result.

I tried it with gcc/g++ 3.4.4.  Worked fine.  Maybe give that a try
and see?

-- 
Larry Hall                              http://www.rfk.com
RFK Partners, Inc.                      (508) 893-9779 - RFK Office
216 Dalton Rd.                          (508) 893-9889 - FAX
Holliston, MA 01746

_____________________________________________________________________

A: Yes.
 > Q: Are you sure?
 >> A: Because it reverses the logical flow of conversation.
 >>> Q: Why is top posting annoying in email?

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