On Fri, 18 Dec 2009 20:07:26 Dr. David Kirkby wrote: > François Bissey wrote: > > On Fri, 18 Dec 2009 14:49:38 William Stein wrote: > >> Better would be a single environment variable such as > >> > >> SAGE_USE_SYSTEM_LIBRARY="readline libz sqlite" > >> > >> with a space separated list of libraries > > > > I was going to suggest something like that myself. > > That would just be the one variable instead of 100(?) > > possible variables. > > I agree, one variable would be better than 100. > > I'm not so sure a space is the best item to separate the names. Personally > I think the more common ':' as used in PATH would be better. > > Typing 'env' on my own system, I see only commas and colons used to > separate lists of items - never a space. > Same here, I guess the choice may depend on what you want to use to parse the list. This is somewhat arbitrary in any case.
> > It would only be effective if the > > variable is not empty and we could put a check only > > in the spkg we think are "safe" to use a system library. > > Francois > > Since this is really only going to be used by developers, I would suggest > no such restriction is imposed. > OK. > What might be 'safe' on one platform, might not be on another. In cases > where a library is causing a build problem, it might be worth disabling > that library, even if it's totally unsafe to do so. I would revisit the > issue of safety once Sage has actually built. > Fair enough. > Would libgpg_error and libgcrypt have been on your 'safe' list? I'm not > sure if they are safe or not, but disabling them on OpenSolaris does at > least allow the build to progress a bit more than it otherwise would. > They would be on my safe list. On Gentoo we build against the system provided gnutls. libgpg_error, libgcrypt and opencdk are brought in as dependencies of gnutls and nothing else. they are on our "safe list". readline is considered safe here but should be treated with caution. bzip2, zlib and libpng are safe. > Once Sage has built, it would be good if there was a way of getting the > list of libraries which were in this list at compile time. In fact, it > could be useful to store all information about the build environment one > possibly could, output of uname -a, hostid, PATH, username, etc etc etc. > +1 Francois -- 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
