On 28 Okt., 09:31, luisfe <lftab...@yahoo.es> wrote: > Just a newby question about spkgs. sage already has readline. If I do > > ./sage > -fhttp://boxen.math.washington.edu/home/kirkby/patches/readline-6.1.spkg > > Will it replace the existing readline or will it make a parallel > installation?
Good question. *Currently*, doing just "./sage -f ..." will only install the new readline library and its headers, but *not* rebuild any package that depends on (i.e. uses) libreadline, so in general - but depending on the version numbers (see below) - some parts of Sage might still use the old library. Also, running "make build" afterwards won't rebuild dependent packages, but instead report "package xyz is already installed" for every package that /should/ in principle get rebuilt. For upgrades of Sage, we've now fixed that in Sage 4.6.rc0, such that you could now do: $ cp /path/to/readline-6.1.spkg spkg/standard/ # assuming you're in SAGE_ROOT $ export SAGE_UPGRADING=yes $ make build which really rebuilds all dependent packages, so all parts of Sage will use the new library. (The old spkg is usually kept in spkg/standard/, and not all packages delete libraries of previous versions, so there might in fact remain old, unused libraries in local/lib/ if the new ones happen to have different filenames.) The above, yet undocumented procedure works just as a "side-effect" or by-product; we'll most probably make further changes to the build / package installation process. In the concrete case, on Linux the (dynamically linked) libraries and executables using libreadline don't have the full version number (6.0 or 6.1) recorded, but only that they need a libreadline.so.6, so the new (6.1) version will be used without recompilation of the programs / libraries using libreadline. (libreadline.so and libreadline.so.6 are symbolic links to the most recent version, e.g. libreadline.so.6.0 or, after installation of the readline-6.1 spkg, libreadline.so.6.1. You can verify that by "ls -l local/lib/libreadline*"; the static library libreadline.a will always be replaced with the latest one.) -Leif -- 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
