port upgrade outdated fails

[Mark Brethen]

Sent from my iPhone

> On Aug 27, 2019, at 3:53 AM, Chris Jones <jonesc at hep.phy.cam.ac.uk> wrote:
> 
> 
> 
>> On 27/08/2019 12:36 am, Mark Brethen wrote:
>> --->  Computing dependencies for arpack
>> --->  Fetching distfiles for arpack
>> Warning: Your DNS servers incorrectly claim to know the address of nonexistent hosts. This may cause checksum mismatches for some ports. See this page for more information: <https://trac.macports.org/wiki/MisbehavingServers>
>> --->  Attempting to fetch arpack-ng-3.7.0.tar.gz from https://distfiles.macports.org/arpack
>> --->  Verifying checksums for arpack
>> --->  Extracting arpack
>> --->  Applying patches to arpack
>> --->  Configuring arpack
>> Error: mpich-default has a different Fortran variant (gcc8) than the one selected, gcc9 (via +gfortran).
>> Error: Failed to configure arpack: Install mpich-default +gcc9
>> Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_math_arpack/arpack/main.log for details.
>> E
>> The mpich upgrade broke arpack. How do I recover from this?
> 
> Do what it says. Install arpack and mpich-default with the same fortran variants.
> 
> Most probably you have mpich-default installed with the older gcc8 variant active, so just uninstall it and then reinstall with the new default, which is gcc9.
> 
> Chris

It’s not that simple, there are several dependent ports that were built to the gcc8 variant. Why did the default gcc change in the first place?