[petsc-users] [SLEPc] record against which PETSc installation it was compiled

[Denis Davydov]

Dear all,

It would be good if SLEPc would store a location of PETSc used during the build in some 
config file, e.g. `slepcconf.h`, so that this information could be retrieved by external libraries (e.g. deal.ii) 
to prevent configuring with PETSc and SLEPc while SLEPc was linking to a different PETSc installation.
See the discussion here https://github.com/dealii/dealii/issues/2167

Kind regards,
Denis