Re: [ublas] g++ 4.4.6 and boost ublas 1_48 compile problem

Subject: Re: [ublas] g++ 4.4.6 and boost ublas 1_48 compile problem
From: Thomas Klimpel (Thomas.Klimpel_at_[hidden])
Date: 2012-02-22 10:23:45

Umut Tabak wrote:
> I have a rather strange problem with ublas 1.48 and g++.
> 
> If I try to compile the example file sparse_fill2.cpp on the wiki page
> of Gunther Winkler, namely,
> 
> http://www.guwi17.de/ublas/matrix_sparse_usage.html
> 
> I get some strange errors due standard library with g++ 4.6.1. I could
> not understand the reason for this.

I guess this is related to
<http://lists.boost.org/MailArchives/ublas/2011/12/5123.php>

> If I use boost 1_47 with g++ 4.4.6,( an older compiler on our cluster)
> then the same code compiles fine and runs without problems.
> 
> Is there a change in the implementation of generalized_vector_of_vector
> from the point of standard library usage, which is quite less likely I
> suppose.
> 
> Any ideas on the source of this difference and error.

Well, probably yes. I guess "std::inplace_merge" from g++ 4.6.1 plays dirty tricks, which it is allowed to do according to the standard. A possible solution would be to use a different implementation of "inplace_merge".

Regards,
Thomas