Workaround for ilu preconditioner for gmm #827
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Now there are some convergence/precision issues with gmm when using the diagonal preconditioner. |
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The ILU preconditioner for gmm currently has some issues, see #707. I locally encountered test failures on my machine now as well.
This PR introduces a workaround for now which disables the ILU preconditioner for Clang >= 21 and GCC >= 15 and uses the diagonal preconditioner instead.. This is less disruptive than completely disabling gmm.