Re: Default F77 is g77

[John W. Eaton]

On 11/24/2014 04:54 PM, Rik wrote:

> Interestingly, this is the entire list of known compilers so we could
> simply put this list in as the preference to AC_PROG_F77 with gfortran at
> the start like so:
>
> AC_PROG_F77([gfortran g77 xlf f77 frt pgf77 cf77 fort77 fl32 af77 xlf90 f90
> pgf90 pghpf epcf90 g95 xlf95 f95 fort ifort ifc efc pgfortran pgf95 lf95 ftn])
>
> I did this and it now picks up gfortran even with g77 symlinked in /usr/bin.

I don't like this solution for the reasons that Mike Miller already stated.

Also, leaving g77 in the list has the problem of screwing things up if a 
system happens to have an old copy of g77 installed but no gfortran.  As 
far as I know, there are no versions of g77 that will work with modern 
versions of gcc and g++.  Since we rely on linking Fortran and C++ code 
together, we must have a consistent set of compilers and g77 will never 
work properly for us.  So we might as well simply avoid it by replacing 
instances of g77 in the configure script with gfortran.  That solution 
seems to be working for us, so I don't see a reason to change it.

jwe