PROJECT SUMMARY

Sage-on-Gentoo provides split ebuilds (http://www.gentoo.org) for the computer algebra system SAGE (http://www.sagemath.org).

CONTACT

If you have problems with sage-on-gentoo or have suggestions talk to us on #gentoo-science on freenode

http://www.gentoo.org/main/en/irc.xml

or write a mail to the "gentoo-science" mailing list

http://www.gentoo.org/main/en/lists.xml

An archive listing past mails may be found at

http://archives.gentoo.org/gentoo-science/

QUICK INSTALLATION GUIDE

1. INSTALL AND CONFIGURE LAYMAN: The preferred way of getting sage-on-gentoo is layman. Make sure layman is installed with USE=git and correctly configured. You may find a guide for layman at:

   http://www.gentoo.org/proj/en/overlays/userguide.xml

2. ADD OUR OVERLAY: Update your layman list and add this overlay with:

   layman -L
   layman -a sage-on-gentoo

Note

Steps 3 and 4 may not be fully or at all necessary on your system. You might want to try skipping to step 5 first, and if it doesn't work, coming back and doing steps 3 and 4.

3. UNMASK EBUILDS: Before being able to install you may need to unmask the required ebuilds. If you are using Gentoo/unstable or Funtoo (i.e. you have a line like ACCEPT_KEYWORDS=~arch in your /etc/portage/make.conf) you can at least skip the keywords entries, but the unmask entries may still be relevant. You can make use of the following files, which already contain all required entries:

   sage-on-gentoo/package.unmask/sage
   sage-on-gentoo/package.keywords/sage

   To use these files permanently, place symbolic links to those files into your /etc/portage/package.unmask and /etc/portage/package.keywords/ directories, respectively:

   ln -s <path-to-layman>/sage-on-gentoo/package.unmask/sage \
         /etc/portage/package.unmask/sage
   ln -s <path-to-layman>/sage-on-gentoo/package.keywords/sage \
         /etc/portage/package.keywords/sage

   Otherwise, simply copy them into the respective directories for a one-time fix.

4. ADD USE-FLAGS FOR EBUILDS: Since Sage's ebuild requires its dependencies to be built with several USE-flags we provide a standard package.use file as well:

   ln -s <path-to-layman>/sage-on-gentoo/package.use/sage \
         /etc/portage/package.use/sage

   If you are using unstable or Funtoo you may also need the following file:

   ln -s <path-to-layman>/sage-on-gentoo/package.use/sage-unstable \
         /etc/portage/package.use/sage-unstable

   <path-to-layman> is usually /var/lib/layman (this path used to be /usr/local/portage/layman for older version of layman).

5. INSTALL SAGE: Type :

   emerge -va sage

   to install sage; please note that this will pull in a lot of dependencies. If you can not proceed with this step (because of circular dependencies, missing USE-flags, and so on) please report this behavior.

   NOTE also, that we do _not recommend to use the ATLAS (sci-libs/blas-alas and/or sci-libs/lapack-atlas) blas/lapack implementation since we experienced some failures with it:

   • cschwan#3
   • cschwan#6

   However, this should not pose a problem since the default choice is the reference implementation.

6. UPDATE YOUR LOCAL OVERLAY: To update your local copy of sage-on-gentoo simply type:

   layman -S

   After that you may run :

   emerge -vuDNa world

   or a similar command to check for updates.

SAGE ON GENTOO PREFIX

A Prefix enables you to install Gentoo on different OS (e.g Linux, FreeBSD, MacOS, Solaris and even Windows). Thus, you may be able to run Sage on Gentoo e.g. on a Debian Linux. For a complete introduction into Gentoo Prefix and how to set it up visit

http://www.gentoo.org/proj/en/gentoo-alt/prefix/

After having a working Prefix you may setup sage-on-gentoo in a Prefix by following the quick installation guide.

Currently, we support every Linux running with x86 or amd64 instruction sets, in particular the following architectures:

• ~amd64-linux
• ~x86-linux