#6391: libGAP!  -- create a Cython library interface to gap
----------------------------------------------------------------------------+
       Reporter:  was                                                       |   
      Owner:  was                                                     
           Type:  enhancement                                               |   
     Status:  positive_review                                         
       Priority:  major                                                     |   
  Milestone:  sage-5.7                                                
      Component:  group theory                                              |   
 Resolution:                                                          
       Keywords:                                                            |   
Work issues:                                                          
Report Upstream:  N/A                                                       |   
  Reviewers:  Dima Pasechnik, Ivan Andrus, Volker Braun, William Stein
        Authors:  Dima Pasechnik, Ivan Andrus, Volker Braun, William Stein  |   
  Merged in:                                                          
   Dependencies:  #13415, #13123, #13211                                    |   
   Stopgaps:                                                          
----------------------------------------------------------------------------+

Comment (by mmarco):

 Indeed, the actual version of libgap is incompatible with the gap-4.5.7
 spkg:

 {{{

 sage: libgap.FreeGroup(4)
 An error occurred, but libGAP has no handler set.
 Error message:
 ---------------------------------------------------------------------------
 RuntimeError                              Traceback (most recent call
 last)

 /home/mmarco/sage-5.5/<ipython console> in <module>()

 /home/mmarco/sage-5.5/local/lib/python2.7/site-
 packages/sage/misc/lazy_import.so in
 sage.misc.lazy_import.LazyImport.__getattr__
 (sage/misc/lazy_import.c:1877)()

 /home/mmarco/sage-5.5/local/lib/python2.7/site-
 packages/sage/misc/lazy_import.so in
 sage.misc.lazy_import.LazyImport._get_object
 (sage/misc/lazy_import.c:1291)()

 /home/mmarco/sage-5.5/libgap.pyx in init sage.libs.gap.libgap
 (sage/libs/gap/libgap.c:4157)()

 /home/mmarco/sage-5.5/libgap.pyx in sage.libs.gap.libgap.Gap.__init__
 (sage/libs/gap/libgap.c:2716)()

 /home/mmarco/sage-5.5/local/lib/python2.7/site-
 packages/sage/libs/gap/util.so in sage.libs.gap.util.initialize
 (sage/libs/gap/util.c:3489)()

 RuntimeError: libGAP initialization failed


 You are running a GAP kernel which does not fit with the library.
 Probably you forgot to apply the kernel part or the library part
 of a bugfix?

 If you are using Windows, make sure you installed the file
 wbin4r5n7.zoo (or .zip),
 Macintosh users make sure the file
 bin4r5n7-PPC.sit (or -68k.sit) is installed,
 Unix users please recompile.

 Error before error-handling is initialized: Update to correct kernel
 version!
 }}}

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6391#comment:159>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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