Hello everybody !!! There is some Cython code used for Linear Programs in sage that require optional packages/libraries to be installed ( they can not become standard because of licence issues ) to compile without error. For the moment, this code is included in the packages themselves, which is not their place. This code frequently has to be modified. Besides, when it is modified ( and so, when the packages themselves have to be modified ), it often happens that other parts of Sage's own code has to be modified too to make it all work. It mean ( a problem we met recently ) that if some user downloads the latest version of the package, and does not have the latest version of Sage, his code will not work as the package is more "recent" than the version of Sage available on the website.
To avoid this, the best option we have is to find a way to move this code out of the package and find it a place in Sage's own code. We would then have Cython files that cannot be compiled until the correct libraries are installed : Do we know how to do this / it is possible to write it if it is not ? This would also fix the problem that, for the moment, the user has to install packages like CBC or GLPK in each BRANCH of Sage to make it work ( and he has to force the install as Sage does not want to do it ). This comes from the fact that when the user installs the package, Sage compiles the Cython files included in it which will only be present in the branch where the user was as this moment. Thank you for your help ! :-) Nathann -- To post to this group, send an email to [email protected] To unsubscribe from this group, send an email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
