[lug] Something tweaked in RH 7.1 g++?

[Keith C. Herold]

I have a curious problem.  I know that 7.1 shipped with an "experimental"
version of the gcc, but what problems exist beyond just trying to compile
the kernel?  I ask because I am having a tremendous amount of trouble
compiling simple code, that seems to work correctly.  I have also had
trouble compiling code that is supposedly tested against 7.1 (no missing
libraries, either).

For example, I am trying to retrieve an Entry from a class called Dataset.
The copy and assignment constructors for Entry are implemented correctly
(according to my testing :) ), and Dataset stores them in a list.  When I
try to retrieve one item from the list using a list iterator in one
particular function, it segfaults.  Every other function seems to operate
correctly, and the various lists are populated with valid data.

Is there something about the 7.1 gcc that you folks know of that causes this
problem?  I have looked on the gnu web site, but nothing jumps out.

--Keith

> -----Original Message-----
> From: lug-admin at lug.boulder.co.us [mailto:lug-admin at lug.boulder.co.us]On
> Behalf Of D. Stimits
> Sent: Tuesday, September 18, 2001 12:02 PM
> To: lug at lug.boulder.co.us
> Subject: Re: [lug] C++ libraries in Linux
>
>
> Keith Brown wrote:
> >
> > I hate to reply to my own mail, but my example is not correct.
> The buf should be
> > unfrozen with buf.freeze(false), at least according to
> Josuttis.  Additionally,
> > strstream has been depreciated and he suggest you use stringstream.
>
> I went and replied before I saw your reply :(
>
> But I would avoid stringstream unless you will not be porting to older
> machines. Even RH 6.2 did not have stringstream, at least I recall it
> was bare in that area. In RH, I think 7.0 is the first to offer it?
>
> D. Stimits, stimits at idcomm.com
>
> >
> > Keith
> >
> > Keith Brown wrote:
> >
> > > Hi,
> > >
> > > I believe you have memory leak in your example.  Once you do
> buf.str(), the
> > > program owns the *char that is returned, unless it tells
> strstream otherwise,
> > > which I forget how to do.  I believe you need to do it like:
> > >
> > > char * s = buf.str();
> > > rtnval = s;
> > > delete [] s;
> > > return rtnval;
> > >
> > > Keith
> > >
> > > "Scott A. Herod" wrote:
> > >
> > > > Hi,
> > > >   I use something like the following:
> > > >
> > > > #include
> > > > <strstream>
> > > > string paraNode::toString()
> > > > {
> > > >     string rtnval;
> > > >     strstream buf;
> > > >
> > > >     buf << "Paragraph: "
> > > >         << ATTR_ALIGN << " = " << _align << ", "
> > > >         << ATTR_WRAP_MODE << " = " << _mode
> > > >         << ends;
> > > >
> > > >     rtnval = buf.str();
> > > >     return rtnval;
> > > > }
> > > >
> > > > > Can it be true?  There are no converters to go from an
> int to a string?  Or
> > > > > a double to a string?
> > > > >
> > > > > --Keith
> > > > _______________________________________________
> > > > Web Page:  http://lug.boulder.co.us
> > > > Mailing List: http://lists.lug.boulder.co.us/mailman/listinfo/lug
> > >
> > > --
> > > Keith Brown
> > > 12640 Xavier St
> > > Broomfield, CO 80020
> > > 303.438.8169
> > >
> > > _______________________________________________
> > > Web Page:  http://lug.boulder.co.us
> > > Mailing List: http://lists.lug.boulder.co.us/mailman/listinfo/lug
> >
> > --
> > Keith Brown
> > 12640 Xavier St
> > Broomfield, CO 80020
> > 303.438.8169
> >
> > _______________________________________________
> > Web Page:  http://lug.boulder.co.us
> > Mailing List: http://lists.lug.boulder.co.us/mailman/listinfo/lug
> _______________________________________________
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