From 863beaed5ba0803e766bb2f8fa3cffbb8397ac02 Mon Sep 17 00:00:00 2001
From: abuts <Alex.Buts@stfc.ac.uk>
Date: Fri, 27 Sep 2024 17:29:35 +0100
Subject: [PATCH] Re #1753 validated horace_mex_mpi

---
 admin/horace_mex_mpi.m | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/admin/horace_mex_mpi.m b/admin/horace_mex_mpi.m
index 8dafd646bf..bf0c4db071 100644
--- a/admin/horace_mex_mpi.m
+++ b/admin/horace_mex_mpi.m
@@ -5,7 +5,7 @@
 % Manually modify this script to specify the mpi libraries location in your
 % system.
 %
-use_her_mpich = false;
+use_her_mpich = true;
 verbose = nargin > 0;
 pths = horace_paths;
 
@@ -70,7 +70,7 @@
 
 build_version_h(pths.root)
 try
-    opt = sprintf('CXXFLAGS=$CFLAGS -fopenmp -std=c++11 -Wl,-rpath=%s,--enable-new-dtags,--no-undefined,-fopenmp',mpi_lib_folder);
+    opt = sprintf('CXXFLAGS=$CFLAGS -fopenmp -std=c++17 -Wl,-rpath=%s,--enable-new-dtags,--no-undefined,-fopenmp',mpi_lib_folder);
     if isempty(opt_file)
         mex('-v',add_include{:},opt,input_files{:},...
             mpi_lib{:},'-outdir',outdir);