[Csdp] [OpenBlas] Problem at run time

[Brian Borchers]

The illegal instruction is most likely due to either

1. Mixing 64 and 32 bit code.

or

2. Compiling code for the wrong processor type (e.g. by specifying
march=something when in fact your processor isn't of that type.)

In building CSDP itself, you will adjust the CFLAGS in the Makefile to
specify

-m32                 32 bit code
-fopenmp          to use OpenMP threading
-ansi
-Ofast
-Wall
-DUSEOPENMP
-DSETNUMTHREADS

For 32 bit code you must not use -DBIT64.

In building OpenBLAS, you need to make sure that you've built a 32 bit
version of OpenBLAS and that you've turned on OpenMP.  Use make with the
options

USE_OPENMP=1         (to use OpenMP threading)
BINARY=32                   (for 32 bit mode)


On Thu, Oct 12, 2017 at 7:05 PM, Frederic Peugny <frederic.peugny at gmail.com>
wrote:

> I am interested to use the Csdp algorithm to solve a kalman filtering
> problem(*)
>
> What I have managed is to compile and link the Library and the example.c
> given with the sources.
> I use Openblas as Blas/Lapack libraries. Since I have Blas already
> installed in my Ubuntu 12.04 PC as VirtualBox 32 bits I had to redirect the
> 32 bits compiled Openblas
>
> sudo update-alternatives --install /usr/lib/libblas_old/libblas.so.3
> libblas.so.3 /usr/lib/libblas/lib/libopenblas.so.0 \
> --slave /usr/lib/liblapack.so.3 liblapack.so.3 /usr/lib/libblas/lib/
> libopenblas.so.0
>
> Then I modified the Csdp Makefile to link libopenblas.a and added -m32 in
> CFLAGS to avoid a problem (my native HW is 64 bits but my Ubuntu run 32
> bit).
>
> Now I have a problem with the first run of the example in the example/
> folder.
> It reads: Illegal instruction (core dumped)
> recompiling with -g flag says just more that the program has a
> segmentation fault when the instruction initsoln(7,2,C,b,constraints,&
> X,&y,&Z)
>
> I am blocked: is it openblas or something else ?
>
> (*) Li
>
> --
> Frédéric
> France
>
>
> France
> --
> Frédéric Peugny
> 06 50 32 92 74
> Résidence les Berges du Midi, Bat. A, N°19
> 25 rue du Bosc
> 31150 FENOUILLET
> France
>
> _______________________________________________
> Csdp mailing list
> Csdp at list.coin-or.org
> https://urldefense.proofpoint.com/v2/url?u=https-3A__list.
> coin-2Dor.org_mailman_listinfo_csdp&d=DwICAg&c=Ngd-
> ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLxWPA_2Wlc4&r=v6WE143jZEM_60H8_5y1Mg&m=
> BOa33i0oYQBUYwrSJTuVccIBzeC_e_4YzZZAJWuH7V4&s=
> vm6KFKbLgz0WHI7jeGQNay2NOnNgfBn_WwfaGPyI2iM&e=
>
>


-- 
Brian Borchers                          borchers at nmt.edu
Department of Mathematics      http://www.nmt.edu/~borchers/
New Mexico Tech                       Phone: (575) 322-2592
Socorro, NM 87801                   FAX: (575) 835-5366
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://list.coin-or.org/pipermail/csdp/attachments/20171012/aaca8c5a/attachment.html>