From 37de4329075110d38085d3651b24a7882e4d3cbe Mon Sep 17 00:00:00 2001
From: Alexander Richardson <alexrichardson@google.com>
Date: Wed, 14 Dec 2022 20:06:16 +0000
Subject: [PATCH] Avoid using std::raise() for divide by zero

---
 Eigen/Core                               | 4 ----
 Eigen/src/Core/functors/BinaryFunctors.h | 6 +++++-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/Eigen/Core b/Eigen/Core
index 48c212189..623d735d6 100644
--- a/Eigen/Core
+++ b/Eigen/Core
@@ -177,10 +177,6 @@ using std::ptrdiff_t;
 #include "src/Core/arch/Default/TypeCasting.h"
 #include "src/Core/arch/Default/GenericPacketMathFunctionsFwd.h"
 
-#ifndef EIGEN_GPU_COMPILE_PHASE
-  #include <csignal>
-#endif
-
 #if defined EIGEN_VECTORIZE_AVX512
   #if defined EIGEN_VECTORIZE_AVX512FP16
     #include "src/Core/arch/AVX512/PacketMathFP16.h"
diff --git a/Eigen/src/Core/functors/BinaryFunctors.h b/Eigen/src/Core/functors/BinaryFunctors.h
index eaa4352b8..c8bb4e775 100644
--- a/Eigen/src/Core/functors/BinaryFunctors.h
+++ b/Eigen/src/Core/functors/BinaryFunctors.h
@@ -388,7 +388,11 @@ template <typename Packet>
 struct maybe_raise_div_by_zero<Packet, true> {
   static EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void run(Packet x) {
     if (EIGEN_PREDICT_FALSE(predux_any(pcmp_eq(x, pzero(x))))) {
-      std::raise(SIGFPE);
+      // Use volatile variables to force a division by zero, which will
+      // result in the default platform behaviour (usually SIGFPE).
+      volatile typename unpacket_traits<Packet>::type zero = 0;
+      volatile typename unpacket_traits<Packet>::type val = 1;
+      val = val / zero;
     }
   }
 };