William,
On Jan 23, 3:37 am, William Stein <wst...@gmail.com> wrote: > On Fri, Jan 22, 2010 at 10:37 AM, Jaap Spies <j.sp...@hccnet.nl> wrote: > > William Stein wrote: > > >> On Fri, Jan 22, 2010 at 9:31 AM, Dima Pasechnik<dimp...@gmail.com> wrote: > > >>> Robert, > >>> the advantage is that it will simplify the *development* of Sage. > >>> Right now lots of stoppers seem to come from upstream packages. > > >>> I also do not see a real problem with "specific versions" of > >>> packages. Somehow, > >>> all the other open-source math projects seem to be able to manage this > >>> well, > >>> e.g. Singular manages to coordinate with GMP. > >>> As well, lots of things like needlessly tying Sage up to a very > >>> particular version or > >>> an environment can be sorted out simply by using autoconf properly... > > >> I so wish you were right! The programs you refer to like Singular > >> are very simple and tiny compared to Sage. If things were so easy as > >> you think, somebody would already have set things up so one can do > >> things that way. Nothing is stopping anyway from doing that now. OK, I oversimplified. As far as a practical step towards having more flexibility: Presently Sage does not have any mechanism allowing for "virtual" packages (I am stealing from Debian/Fink here) that would allow for using the already installed, somewhere on the system, non-Sage part of a Sage spkg. It would check if what's already installed satisfies the prerequisites, and if not, (sage -install, say) would pull a replacing "full" spkg from a Sage repository. Of course in some cases the pre-requisites check is quite tricky, but there are trivial cases, like bzip and mercurial, too... How hard would it be to have such a thing? > > > Happens that Singular is a stumbling stone in the port of Sage to > > Open Solaris 64 bit! As it comes to building libsingular I have no clue at > > the moment. > > Even things that are relative simple aren't very simple. > > Sage has a cross-platform build system and environment. One question > that is related to the discussion in this thread is what the situation > is with other cross-platform build environments. Of course I know > about Debian/Fink/Cygwin/etc., which are specific to different > operating systems. Does anybody know of *any* good cross-platform > build environments besides Sage? Python + > (distutils+distribute+whatever) is such a thing to some extent... Debian packaging/build system is used in Fink (for people unfamiliar with MacOSX: http://www.finkproject.org/) and there is also a FreeBSD port that uses Debian: http://www.debian.org/ports/kfreebsd-gnu/ Thus, yes, Debian is one such cross-platform system. OK, yes, it still needs some OS-specific glue, but not too much, and it runs atop of a Unix shell. By the way, In Haskell there is a build environment (Cabal ?) similar to the Python's... Dmitrii > > William -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
