Bug#1014514: Armadillo library doesnt work correct anymore after update to Debian 11

[Kumar Appaiah]

Dear Andrew,


Apologies for the late response.

On Thu, Jul 07, 2022 at 11:51:47AM +0000, Schlager, Andreas wrote:
>    After updating to Debian 11, the armadillo library for C++ doesn’t work
>    properly anymore (e.g. matrix inversions deliver obviously wrong results),
>    as can be seen in the example code and results attached.
> 
>    Short note about the problem: Assume you have a square matrix B, then
>    B*inv(B) should yield the unit matrix. In armadillo this worked without
>    problems until the update to Debian 11. Now I get a completely random
>    result for B*inv(B). The larger the dimension of B the more severe the
>    problem is. There might be a numerical issue that didn’t exist in older
>    Debian versions.
> 
>     
> 
>    According to the Armadillo-team, this is not a problem of Armadillo itself
>    but might be the problem of the versions of libopenblas, liblapack or
>    libblas used by Debian 11.
> 
>    One of these libraries might be corrupt or incompatible with Debian 11.

In my current installation, I do not have this problem, with libblas3
and liblapack3 version 3.10.1-2. Can you please let me know whether
you still have this issue with your current installation?

Thanks.

Kumar