> Having a working Gentoo-prefix that one could use if the host system's > toolchain is broken already would be very interesting. > > But when I played around with it I ran into some library problems. For > example, gmp/mpir would be installed twice (host and gentoo prefix), > potentially mutually incompatible versions. Sometimes configure scripts > look in the wrong place, for example. Its no insurmountable problem, but I > never managed to recompile the whole prefix with itself.
That would definitely be bugs. If you don't care about submitting bugs you can always forward me your problems and I'll work on a solution and get it reported in the appropriate place. prefix is definitely a work in progress and there are rather nasty corners, especially when you stray off linux to other platforms. But you raised the gmp/mpir issue that I think should be mentioned. In sage-on-gentoo we use gmp rather than mpir. It's a technical choice. gmp and mpfr (and now mpc) are system packages required to build gcc. Almost no packages in sage have ported to mpir, rather sage relies on mpir installing compatibility (or fake) headers and libraries. This is a problem on gentoo unless we ask the toolchain team to switch to mpir. Somehow I don't see that happening soon unless upstream gcc itself makes it an option. Porting all the stack of software to pure mpir is possible but then we'd also need a mpir enabled mpfr separate from the system one... in short the KISS solution is to stick to gmp. I could provide a "small" tree that would let you build the system with mpir, that could be an interesting experiment. On the other hand if we go anywhere with the experiment of using a reduced portage with gcc wrappers there would be no problems of collision between gmp and mpir. Francois This email may be confidential and subject to legal privilege, it may not reflect the views of the University of Canterbury, and it is not guaranteed to be virus free. If you are not an intended recipient, please notify the sender immediately and erase all copies of the message and any attachments. Please refer to http://www.canterbury.ac.nz/emaildisclaimer for more information. -- 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
