Re: [Condor-users] condor_compile with dynamic linking ?

["Smith, Ian" <I.C.Smith@xxxxxxxxxxxxxxx>]

Thought I'd report that DMTCP checkpointing seems to work
fine with standalone MATLAB executables although seemingly
not with the MATLAB interpreter (Debian 5/Matlab R2011b). 
Would be nice to be able to run these under standard universe though.

regards,

-ian.

> -----Original Message-----
> From: condor-users-bounces@xxxxxxxxxxx [mailto:condor-users-
> bounces@xxxxxxxxxxx] On Behalf Of Smith, Ian
> Sent: 15 December 2011 10:46
> To: 'Condor-Users Mail List'
> Subject: [Condor-users] condor_compile with dynamic linking ?
> 
> Dear All,
> 
> I'm trying to see if I can build MATLAB standalone excutables
> using condor_compile on a Debian 5 VM. The main problem seems
> to be that almost all of the MATLAB libraries are provided as
> dynamic shared objects (.so's) and condor_compile doesn't seem
> to want to link them.
> 
> $ condor_compile gcc <matlab link options ....>
> 
> gives
> 
> /usr/bin/ld: cannot find -lmwmclmcrrt
> 
> ...presumably because it's looking for the Matlab runtime library
> called libmwmclmcrrt.a which is only available as a DSO: libmwmclmcrrt.so
> 
> If I do a bit of hacking and pull out the -Bstatic link option that
> condor_compile puts in, I can link OK but the executable crashes
> seemingly at the start of the Matlab code:
> 
> smithic@vma103228:~$ ./mydriver
> Condor: Notice: Will checkpoint to ./mydriver.ckpt
> Condor: Notice: Remote system calls disabled.
> terminate called after throwing an instance of 'apiException'
>   what():  Fatal error loading library /home/smithic/libmx.so Error:
> /home/smit
> ic/libmx.so: cannot open shared object file: No such file or directory
> 
> (Note that the Condor code is in there though).
> 
> So the $ 64,000 question is - is there anyway I can build an executable
> with
> checkpointing support if it calls shared object libraries.
> 
> regards,
> 
> -ian.
> 
> PS1: Despite comments I've seen on this list or elsewhere, it is still
> possible to
> translate MATLAB M-files into C using the Matlab Coder. Whether this
> allows
> you to build a monolithic statically linked executable is not clear. It
> certainly
> does not allow you to use all of the toolbox functions available. See:
> http://www.mathworks.com/help/toolbox/eml/ug/bsud5f4.html
> 
> PS2: I'm thinking of looking at DMTCP as a way of doing checkpointing
> without
> the need for recompiling/linking (see: http://dmtcp.sourceforge.net/ ). It
> specifically mentions MATLAB as an application. Has anyone had any success
> with this ?
> 
> PS3: If anyone is interested - I wrote some notes for our users on how to
> include
> their own checkpointing/restart functionality in their M-files. I haven't
> managed
> to persuade too many users to do this (need to take more of a BOFH
> approach obviously)
> but those that have found it worked quite well. See:
> 
> http://www.liv.ac.uk/csd/escience/condor/checkpoint.htm
> 
> 
> ---------------------------------------
> Dr Ian C. Smith,
> Advanced Research Computing,
> University of Liverpool, UK.
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