From 886e2fe51c358a8d21fb331370071bbca259021b Mon Sep 17 00:00:00 2001 From: David Wells Date: Thu, 14 Jul 2016 17:16:44 -0400 Subject: [PATCH] Add a warning against using --download-mpich. This is a PETSc option that usually causes trouble, especially when a user already has MPI installed on their machine. --- doc/external-libs/petsc.html | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/doc/external-libs/petsc.html b/doc/external-libs/petsc.html index 10a92ab7b7..78b75b2762 100644 --- a/doc/external-libs/petsc.html +++ b/doc/external-libs/petsc.html @@ -113,7 +113,12 @@

This automatically builds PETSc with both MPI and the algebraic - multigrid preconditioner package Hypre (which we use in step-40). + multigrid preconditioner package Hypre (which we use in step-40). If you + would like to use PETSc with MPI then we recommend that you install MPI + through your package manager instead of letting PETSc install it: put + another way, installing PETSc with the flag --download-mpich + often causes problems (such as linking errors or poor performance) + that may be avoided by using whatever your system provides instead.
Now let PETSc check his own sanity:

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2.39.5