From a36b5d36179c9357310aa9ec3102819eb66570af Mon Sep 17 00:00:00 2001
From: Shengqi Chen <harry-chen@outlook.com>
Date: Thu, 11 Sep 2025 22:43:09 +0800
Subject: [PATCH] Fix MPI_Init arguments in LpMumpsSolverInterface to fix
 SIGSEGV with MPICH >= 4.3.1

MPICH (>= 4.3.1) will dereference `argv` when `argc` is larger than 0.
The previous way of passing arguments will cause a SIGSEGV since `argv` is NULL.

See: https://github.com/pmodels/mpich/commit/e9560dde891ab1414b9aec02a2e8acc4622d5e1b

diff --git a/src/Algorithm/LinearSolvers/IpMumpsSolverInterface.cpp b/src/Algorithm/LinearSolvers/IpMumpsSolverInterface.cpp
index 14c475ddd..88599dd6e 100644
--- src/Algorithm/LinearSolvers/IpMumpsSolverInterface.cpp
+++ src/Algorithm/LinearSolvers/IpMumpsSolverInterface.cpp
@@ -63,9 +63,7 @@ static void MPIinit(void)
    MPI_Initialized(&mpi_initialized);
    if( !mpi_initialized )
    {
-      int argc = 1;
-      char** argv = NULL;
-      MPI_Init(&argc, &argv);
+      MPI_Init(NULL, NULL);
    }
 }