From 5e09f88a2b3b8db7d0b8120244256ae2f1a7a625 Mon Sep 17 00:00:00 2001
From: Vas Crabb <vas@vastheman.com>
Date: Tue, 14 Jan 2025 04:33:40 +1100
Subject: [PATCH] util/mfpresolve.h: Linux wants <cstddef> for ptrdiff_t.

---
 src/lib/util/mfpresolve.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/lib/util/mfpresolve.h b/src/lib/util/mfpresolve.h
index c9a2eba6a95..4b4f62373d3 100644
--- a/src/lib/util/mfpresolve.h
+++ b/src/lib/util/mfpresolve.h
@@ -15,6 +15,7 @@
 #include "abi.h"
 
 #include <cassert>
+#include <cstddef>
 #include <cstdint>
 #include <utility>
 
@@ -66,7 +67,7 @@ inline std::pair<std::uintptr_t, std::uintptr_t> resolve_member_function(Ret (T:
 {
 	if (MAME_ABI_CXX_TYPE == MAME_ABI_CXX_ITANIUM)
 	{
-		struct { uintptr_t ptr; ptrdiff_t adj; } equiv;
+		struct { std::uintptr_t ptr; std::ptrdiff_t adj; } equiv;
 		static_assert(sizeof(function) == sizeof(equiv));
 		*reinterpret_cast<decltype(function) *>(&equiv) = function;
 		return detail::resolve_member_function_itanium(equiv.ptr, equiv.adj, object);