Singular
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unknown link type MPfile
https://www.singular.uni-kl.de/forum/viewtopic.php?f=10&t=1863		 Page 1 of 1
Author:  dmurfet [ Fri Oct 01, 2010 9:47 pm ]
Post subject:  unknown link type MPfile
Hi,

I'm looking for some advice on how to resolve an I/O error in the latest version of Singular. The administrator of the UCLA math department cluster kindly installed Singular 3-1-1 for me last week. However, upon trying to open an MPfile link I receive the error

> link l = "MPfile: ./temp.mp";
// ** Found unknown link type: MPfile
// ** Use default link type: ASCII

The system information and Singular version follows (some snips):

Linux version 2.6.31.14-0.1-default (gcc version 4.4.1 [gcc-4_4-branch revision 150839] (SUSE Linux) )

Singular for x86_64-Linux version 3-1-1 (3110-2010030317) Mar 3 2010 17:31:45
with
factory(@(#) factoryVersion = 3.1.1),libfac(3.1.1,Feb 2010),
GMP(4.2),NTL(5.5.2),64bit,unknown fgets method,Plural,DBM,
dynamic modules,dynamic p_Procs,OM_CHECK=0,OM_TRACK=0,random=1285961800
CC= gcc -O3 -w -fomit-frame-pointer -pipe -DNDEBUG -DOM_NDEBUG -Dx86_64_Linux -DHAVE_CONFIG_H,
CXX= g++ -O3 -w -fomit-frame-pointer --no-rtti -pipe -DNDEBUG -DOM_NDEBUG -Dx86_64_Linux -DHAVE_CONFIG_H (4.3.4)

Is this simply a matter of some appropriate flag not being set during installation? (I believe it was installed from the RPM, there are further details on the installation method which I am unable to link to here due to forum restrictions! I am happy to provide the link via email: daniel fullstop murfet at gmail dot com).

It would be greatly appreciated if someone could suggest a course of action, which I might then forward to the IT staff (who have no prior experience with Singular).

Thanks,

Daniel.
Author:  hannes [ Sat Oct 02, 2010 2:17 pm ]
Post subject:  Re: unknown link type MPfile
The MP library is not 64bit clean.
Therefore all 64bit versions of Singular do not contain MPtcp and MPfile.
That can be tested by:
system("with","MP")
which returns 0 for the 64bit versions.
If you really need MP try the 32bit version of Singular.
Author:  dmurfet [ Sun Oct 03, 2010 8:13 pm ]
Post subject:  Re: unknown link type MPfile
Thanks hannes, that's very helpful.
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