Re: RE: input stream crash with gcc 3.1

Re: RE: input stream crash with gcc 3.1

[Dylan Cuthbert]

I tried this #define (in the newlib bits directory - cygwin uses newlib
right?), reconfigured and recompiled gcc 3.1, but the same problem occurs -
segmentation fault on the simplest bit of code that uses cin or ifstream or
stringstream.  ( cout etc. works fine by the way).

I'll repeat the code snippet for clarification:

main()
{
std::string frog;
std::cin >> frog;
assert( 0 );
}

(it doesn't get to the assert and segment faults)

Any other ideas? :-/

---------------------------------
Q-Games, Dylan Cuthbert.
http://www.q-games.com/personal/utils

----- Original Message -----
From: "Danny Smith" <danny_r_smith_2001@yahoo.co.nz>
To: <dylan@q-games.com>
Sent: Tuesday, March 19, 2002 8:08 AM
Subject: Fwd: RE: input stream crash with gcc 3.1


> > From: Danny Smith <danny_r_smith_2001@yahoo.co.nz>
> > Subject: RE: input stream crash with gcc 3.1
> > To: dylan@nospamq-games.com
> > CC: cygwin@cygwin.com
> >
> > > I have recently compiled the latest 3.1 branch (grabbed directly via
> > cvs)
> > > for cygwin (1.3.9) and am having problems when using anything related
> > at
> > > all
> > > to input streams.
> >
> > See this:
> > http://gcc.gnu.org/ml/gcc-patches/2001-06/msg00841.html
> > then try rebuilding libstdc++ with
> >
> > #define _GLIBCPP_AVOID_FSEEK
> > added to /libstdc++-v3/config/os/newlib/bits/os_defines.h
> >
> > Danny
> >
> > http://movies.yahoo.com.au - Yahoo! Movies
> > - Vote for your nominees in our online Oscars pool.
> >
>
> http://movies.yahoo.com.au - Yahoo! Movies
> - Vote for your nominees in our online Oscars pool.


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Re: RE: input stream crash with gcc 3.1

[Dylan Cuthbert]

Hmm.. I noticed some talk on a mailing list somewhere about problems with
locales... could it be to do with input streams trying to look up locale
info and getting null ptrs as a result?

I'll try compiling libstdc++-v3 with -g and -O0 and see how far I can get -
does gdb 5.1 work ok with gcc 3.1 output?

Regards

---------------------------------
Q-Games, Dylan Cuthbert.
http://www.q-games.com

"Billinghurst, David (CRTS)" <David.Billinghurst@riotinto.com> wrote in
message
news:FAC87D7C874EAB46A847604DA4FD5A640346C9@crtsmail.corp.riotinto.org...
I just tried this too. Same result.  I have been chasing (without success)
some libstdc++-v3 testsuite failures that are similar.  That discusion is on
the libstdc++ mailing list.   The advice was to try recompiling libtsdc++-v3
with CXXFLAGS="-g -O0" and use the debugger.  This got me a little further
into the code.

-----Original Message-----
From: Dylan Cuthbert [mailto:dylan@q-games.com]
Sent: Tuesday, 19 March 2002 2:11
Subject: Re: RE: input stream crash with gcc 3.1


I tried this #define (in the newlib bits directory - cygwin uses newlib
right?), reconfigured and recompiled gcc 3.1, but the same problem occurs -
segmentation fault on the simplest bit of code that uses cin or ifstream or
stringstream.  ( cout etc. works fine by the way).

I'll repeat the code snippet for clarification:

main()
{
std::string frog;
std::cin >> frog;
assert( 0 );
}

(it doesn't get to the assert and segment faults)

Any other ideas? :-/

---------------------------------
Q-Games, Dylan Cuthbert.
http://www.q-games.com/personal/utils

----- Original Message -----
From: "Danny Smith" <danny_r_smith_2001@yahoo.co.nz>
Sent: Tuesday, March 19, 2002 8:08 AM
Subject: Fwd: RE: input stream crash with gcc 3.1


> > From: Danny Smith <danny_r_smith_2001@yahoo.co.nz>
> > Subject: RE: input stream crash with gcc 3.1
> > To: dylan@nospamq-games.com
> > CC: cygwin@cygwin.com
> >
> > > I have recently compiled the latest 3.1 branch (grabbed directly via
> > cvs)
> > > for cygwin (1.3.9) and am having problems when using anything related
> > at
> > > all
> > > to input streams.
> >
> > See this:
> > http://gcc.gnu.org/ml/gcc-patches/2001-06/msg00841.html
> > then try rebuilding libstdc++ with
> >
> > #define _GLIBCPP_AVOID_FSEEK
> > added to /libstdc++-v3/config/os/newlib/bits/os_defines.h
> >
> > Danny
> >
> > http://movies.yahoo.com.au - Yahoo! Movies
> > - Vote for your nominees in our online Oscars pool.
> >
>
> http://movies.yahoo.com.au - Yahoo! Movies
> - Vote for your nominees in our online Oscars pool.


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RE: RE: input stream crash with gcc 3.1

[Billinghurst, David (CRTS)]

I just tried this too. Same result.  I have been chasing (without success) some libstdc++-v3 testsuite failures that are similar.  That discusion is on the libstdc++ mailing list.   The advice was to try recompiling libtsdc++-v3 with CXXFLAGS="-g -O0" and use the debugger.  This got me a little further into the code.  

-----Original Message-----
From: Dylan Cuthbert [mailto:dylan@q-games.com]
Sent: Tuesday, 19 March 2002 2:11 
To: Danny Smith; Cygwin@Cygwin. Com
Subject: Re: RE: input stream crash with gcc 3.1


I tried this #define (in the newlib bits directory - cygwin uses newlib
right?), reconfigured and recompiled gcc 3.1, but the same problem occurs -
segmentation fault on the simplest bit of code that uses cin or ifstream or
stringstream.  ( cout etc. works fine by the way).

I'll repeat the code snippet for clarification:

main()
{
std::string frog;
std::cin >> frog;
assert( 0 );
}

(it doesn't get to the assert and segment faults)

Any other ideas? :-/

---------------------------------
Q-Games, Dylan Cuthbert.
http://www.q-games.com/personal/utils

----- Original Message -----
From: "Danny Smith" <danny_r_smith_2001@yahoo.co.nz>
To: <dylan@q-games.com>
Sent: Tuesday, March 19, 2002 8:08 AM
Subject: Fwd: RE: input stream crash with gcc 3.1


> > From: Danny Smith <danny_r_smith_2001@yahoo.co.nz>
> > Subject: RE: input stream crash with gcc 3.1
> > To: dylan@nospamq-games.com
> > CC: cygwin@cygwin.com
> >
> > > I have recently compiled the latest 3.1 branch (grabbed directly via
> > cvs)
> > > for cygwin (1.3.9) and am having problems when using anything related
> > at
> > > all
> > > to input streams.
> >
> > See this:
> > http://gcc.gnu.org/ml/gcc-patches/2001-06/msg00841.html
> > then try rebuilding libstdc++ with
> >
> > #define _GLIBCPP_AVOID_FSEEK
> > added to /libstdc++-v3/config/os/newlib/bits/os_defines.h
> >
> > Danny
> >
> > http://movies.yahoo.com.au - Yahoo! Movies
> > - Vote for your nominees in our online Oscars pool.
> >
>
> http://movies.yahoo.com.au - Yahoo! Movies
> - Vote for your nominees in our online Oscars pool.


--
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