Merged requested to merge ZUUL42:Werror_Ifpack into develop
Created by: ZUUL42
EDIT: Modified PR & branch after I saw #4517
This sets Werror for Ifpack.
Motivation and Context
This is work toward #3178 turning Werror on for all packages.
My commit messages mention the appropriate GitHub issue numbers.
My code follows the code style of the affected package(s).
My change requires a change to the documentation.
I have updated the documentation accordingly.
I have read the code contribution guidelines for this project.
I have added tests to cover my changes.
All new and existing tests passed.
No new compiler warnings were introduced.
These changes break backwards compatibility.