S�bastien Villemot dixit: >In order to fix this, we need to pre-compute so-called "architectural >defaults" for m68k. These are pre-computed timings that will speed up >dramatically the build of the package. > >The procedure for doing this is explained in the README.source of atlas >[1] (I am interested in the generated .tar.bz2).
| The ATLAS build system, before creating the binaries, first performs a very | long series of timing tests in order to tune the library to the precise CPU on | which it is built. I think this is conceptionally broken, especially when an architecture has a very broad range (think of i386 as prime example: it’s perfectly valid to build atlas on an i80486DX CPU and use it on a multi-core multi-GHz system, or the other way round). Please tell me how the differences between the CPUs will affect the generated package, i.e. whether these precomputed timings should be done on one of the slower machines. On m68k, we have machines from about 25 MHz (I think) up to 66/80 MHz, and “virtual machine” buildds with roughly 60-200 MHz (I only have access to the latter). >Either you do it yourself on a m68k machine and send me the result, or >you give me access to such a machine (I can't login to crest.debian.net, >it seems down). Right, that information is old. At the moment, there’s no porterbox; we ask people to install one of those VMs themselves or hand things off to us with instructions. >http://anonscm.debian.org/gitweb/?p=debian-science/packages/atlas.git;a=blob_plain;f=debian/README.source;hb=HEAD I think these instructions are good, and can do that, yes, but please let me know about how the speed of the CPU used for the pregenerated timings will affect the package when run on much slower CPUs. Nevertheless, thanks a lot for caring about this! Thanks, //mirabilos -- <hecker> cool ein Ada Lovelace Google-Doodle. aber zum 197. Geburtstag? Hätten die nicht noch 3 Jahre warten können? <mirabilos> bis dahin gibts google nicht mehr <hecker> ja, könnte man meinen. wahrscheinlich ist der angekündigte welt- untergang aus dem maya-kalender die globale abschaltung von google ☺ und darum müssen die die doodles vorher noch raushauen -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
