Am Sonntag, 26. Juni 2011, 15:01:19 schrieb Dale: > Michael Schreckenbauer wrote: > > Am Sonntag, 26. Juni 2011, 10:28:47 schrieb Dale: > >> Michael Schreckenbauer wrote: > >>> Am Samstag, 25. Juni 2011, 14:58:56 schrieb Peter Humphrey: > >>>> Whether "many" operations are written in Fortran is immaterial. > >>>> What > >>>> matters to me is whether any on my system are. If they aren't, I > >>>> don't need a Fortran compiler and I'd rather not waste system > >>>> resources on building one. > >>> > >>> Try euse -I fortran. > >>> If anything besides gcc pops up, you should have one. > >>> > >>> Regards > >>> Michael > >> > >> That doesn't appear to work like it should then. I get this: > >> > >> root@fireball / # euse -I fortran > >> global use flags (searching: fortran) > >> ************************************************************ > >> [+ CD ] fortran - Adds support for fortran (formerly f77) > >> > >> Installed packages matching this USE flag: > >> sys-devel/gcc-4.4.5 > >> > >> local use flags (searching: fortran) > >> ************************************************************ > >> no matching entries found > >> root@fireball / # > >> > >> Thing is, I know a couple packages use it on this rig because I just > >> had > >> to recompile them. Cantor and R are two that I recall. > >> > >> Maybe it is because it is not a option in the list? The USE flag that > >> is. > > > > Iirc you had problems with -fortran, because you have packages that > > really need fortran. My suggestion was for people like Peter, who have > > no problems without fortran. It shows only packages which could perform > > better, if a fortran compiler is available and otherwise fallback to a > > C implementation. At least, I think it does :) > > > >> Dale > >> > >> :-) :-) > > > > Michael > > Thing is, I switched it back and programs on here now need fortran to > build. So, euse is not reporting it but R and Cantor won't build > without fortran.
That's because R needs a fortran compiler to compile. It does not have a C fallback solution for its maths. cantor depends on R per default. So it won't build until a working R is installed. Peter is not having problems without fortran. Everything compiles fine. So I am quite shure he has neither R nor cantor installed or any other program that needs a fortran compiler to build at all. This euse command shows only packages where fortran is optional. This means better performance, when enabled, in all (at least almost all) cases. > Basically, euse should also report R and cantor but it > isn't. If mine isn't reporting that, then Peter's may not either. That's impossible, I think. euse reports USE-flags. These programs don't have a fortran-USE-flag. R needs it unconditionally.. > Dale > :-) :-) Michael
