From 8a311d7746f606c4127eb695fa2e59e7e7cd8f06 Mon Sep 17 00:00:00 2001
From: Veselin Dobrev <v-dobrev@users.noreply.github.com>
Date: Sat, 14 Oct 2023 22:01:53 -0700
Subject: mfem: add a patch for v4.6 for gcc 13, see mfem PR 3903 (#40495)

---
 var/spack/repos/builtin/packages/mfem/mfem-4.6.patch | 12 ++++++++++++
 var/spack/repos/builtin/packages/mfem/package.py     |  1 +
 2 files changed, 13 insertions(+)
 create mode 100644 var/spack/repos/builtin/packages/mfem/mfem-4.6.patch

diff --git a/var/spack/repos/builtin/packages/mfem/mfem-4.6.patch b/var/spack/repos/builtin/packages/mfem/mfem-4.6.patch
new file mode 100644
index 0000000000..94f1f863f8
--- /dev/null
+++ b/var/spack/repos/builtin/packages/mfem/mfem-4.6.patch
@@ -0,0 +1,12 @@
+diff --git a/general/kdtree.hpp b/general/kdtree.hpp
+index eebbdaa27..b35a33ea4 100644
+--- a/general/kdtree.hpp
++++ b/general/kdtree.hpp
+@@ -17,6 +17,7 @@
+ #include <fstream>
+ #include <iostream>
+ #include <cmath>
++#include <cstdint>
+ #include <tuple>
+ 
+ namespace mfem
diff --git a/var/spack/repos/builtin/packages/mfem/package.py b/var/spack/repos/builtin/packages/mfem/package.py
index eb869fc255..b4c66447a1 100644
--- a/var/spack/repos/builtin/packages/mfem/package.py
+++ b/var/spack/repos/builtin/packages/mfem/package.py
@@ -468,6 +468,7 @@ class Mfem(Package, CudaPackage, ROCmPackage):
     # upstream.
     patch("mfem-4.0.0-makefile-syntax-fix.patch", when="@4.0.0")
     patch("mfem-4.5.patch", when="@4.5.0")
+    patch("mfem-4.6.patch", when="@4.6.0")
 
     phases = ["configure", "build", "install"]
 
-- 
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