PETSc autodetect

[Michał Wichrowski]

Dear all,

While I was setting up deal.II compilation on another machine I got stuck for weeks: it was crashing when running with MPI. It turned out that Deal.II managed to auto-detect PETSc (I did not turn it on, I am not using it), which was causing issues with the initialization of any MPI program. 

May I suggest changing Deal.II configuration script to disable autodetection of PETSc by default and do it only if the user explicitly asked for it? To be honest, I had a bad experience with it and I haven't found PETSc superior to Trilinos in any application.

Best, 

Michał

[Praveen C]

There is a

DEAL_II_ALLOW_AUTODETECTION = ON|OFF

option, which probably disables all auto detection.

best

praveen

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