From 48dbe22e3242ff847c0f5523e42db4e328212193 Mon Sep 17 00:00:00 2001
From: Stefan Reinauer <stefan.reinauer@coreboot.org>
Date: Mon, 1 Jun 2026 13:39:20 -0700
Subject: [PATCH] pcem: fit graphics sources into C++ builds

WinUAE builds the imported PCem graphics sources as C++ files.
The MGA source includes C atomics directly, and the BT482 RAMDAC
source uses C allocation declarations through C++ headers.

Use C++ atomics when compiling MGA as C++, and include the C++
cstdlib wrapper where the BT482 RAMDAC needs those declarations.
---
 pcem/vid_bt482_ramdac.cpp | 1 +
 pcem/vid_mga.cpp          | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/pcem/vid_bt482_ramdac.cpp b/pcem/vid_bt482_ramdac.cpp
index 9c4d8264..1737acec 100644
--- a/pcem/vid_bt482_ramdac.cpp
+++ b/pcem/vid_bt482_ramdac.cpp
@@ -2,6 +2,7 @@
 /* BT482 RAMDAC (based on 86box BT484) */
 
 #include <memory>
+#include <cstdlib>
 #include "ibm.h"
 #include "mem.h"
 #include "device.h"
diff --git a/pcem/vid_mga.cpp b/pcem/vid_mga.cpp
index 891b1d8d..329f8bc2 100644
--- a/pcem/vid_mga.cpp
+++ b/pcem/vid_mga.cpp
@@ -20,7 +20,14 @@
 #include <string.h>
 #include <stdlib.h>
 #include <wchar.h>
+#ifdef __cplusplus
+#include <atomic>
+using std::atomic_bool;
+using std::atomic_int;
+using std::atomic_uint;
+#else
 #include <stdatomic.h>
+#endif
 #include "ibm.h"
 #include "device.h"
 #include "io.h"
-- 
2.47.3