Hi, As far as I know, there is no interaction between which compilers are for atlas and what is used for any dependency. I am not sure why Marius thought they need the same Fortran compiler.
The atlas port will choose a Fortran compiler on its own if any is available. Using a variant just specifies manually which one. You need the Fortran support to be able to link from Fortran in a dependency. Murray, regarding "arpack does offer a +gcc5 variant, yet “sudo port info arpack” lists a build dependency on gcc6." -- "port info" shows dependencies for the default variants. So, that doesn't mean that arpack +gcc5 would depend on gcc6. David On Sun, Nov 6, 2016 at 11:53 AM, Murray Eisenberg <murrayeisenb...@gmail.com > wrote: > OK, I understand that. But there seems to be a catch: > > * arpack does offer a +gcc5 variant, yet “sudo port info arpack” lists a > build dependency on gcc6. > > And as you’ve noticed and as I was already aware: > > * atlas has no +gcc6 variant. > > Will that be a problem in installing both arpack and atlas (before > installing octave)? > > > On Nov 6, 2016, at 2:31 PM, Marius Schamschula <li...@schamschula.com> > wrote: > > Murray, > > The version of gfortran depends on the version of gcc chosen by the > compilers port group (currently gcc5). > > On Nov 6, 2016, at 12:50 PM, Murray Eisenberg <murrayeisenb...@gmail.com> > wrote: > > > On Nov 6, 2016, at 1:27 PM, Marius Schamschula <li...@schamschula.com> > wrote: > > > On Nov 6, 2016, at 12:19 PM, Murray Eisenberg <murrayeisenb...@gmail.com> > wrote: > > I’m reinstalling arpack, atlas, and octave during completion of MacPorts > migration to macOS Sierra. > > On El Capitan, my installed ports included: > > arpack @3.3.0_3+atlas+gfortran > atlas @3.10.2_2 > octave @4.0.3_1+app+atlas+docs+fltk+gfortran+graphicsmagick+ > qt4gui+sound-accelerate-java > > I began now with: > > sudo port install arpack -accelerate+atlas > > (1) Should I have added +gfortran there, since for octave I’m going to be > including variant +gfortran ? > > (2) Is there any particular reason to use a +gccxx variant with atlas? > > > The choice of which version of gfortran is used for arpack should be the > same as the version used to build atlas (and for that matter octave). > > Unfortunately, atlas currently only supports gcc5, not gcc6. See > https://trac.macports.org/ticket/52606 > > > I don’t understand about “which version of gfortran”: arpack, like octave, > offers +gfortran but without any indication of version of gfortran. > And atlas does not offer any variant (at least directly) of fortran. > > > > --- > Murray Eisenberg murrayeisenb...@gmail.com > 503 King Farm Blvd #101 Home (240)-246-7240 > Rockville, MD 20850-6667 Mobile (413)-427-5334 > > >
