From 1dbc7581ece8d8519e3dac4be1587b00db5b5584 Mon Sep 17 00:00:00 2001
From: Rasmus Munk Larsen <rmlarsen@google.com>
Date: Wed, 14 Aug 2024 17:44:14 +0000
Subject: [PATCH] Include <thread> for std::this_thread::yield().

---
 Eigen/Core | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Eigen/Core b/Eigen/Core
index e452e73ae..29dda3932 100644
--- a/Eigen/Core
+++ b/Eigen/Core
@@ -97,6 +97,11 @@
 // for std::is_nothrow_move_assignable
 #include <type_traits>
 
+// for std::this_thread::yield().
+#if !defined(EIGEN_USE_BLAS) && (defined(EIGEN_HAS_OPENMP) || defined(EIGEN_GEMM_THREADPOOL))
+#include <thread>
+#endif
+
 // for outputting debug info
 #ifdef EIGEN_DEBUG_ASSIGN
 #include <iostream>
@@ -117,8 +122,8 @@
 #include <CL/sycl.hpp>
 #include <map>
 #include <memory>
-#include <utility>
 #include <thread>
+#include <utility>
 #ifndef EIGEN_SYCL_LOCAL_THREAD_DIM0
 #define EIGEN_SYCL_LOCAL_THREAD_DIM0 16
 #endif