From b31ab1960b321ad30179ef113ab8bb024e58a67a Mon Sep 17 00:00:00 2001
From: Alan Mishchenko <alanmi@berkeley.edu>
Date: Mon, 18 Mar 2024 21:30:46 +0900
Subject: [PATCH] Fixing compilation issues on Windows.

---
 src/map/if/acd/ac_wrapper.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/map/if/acd/ac_wrapper.h b/src/map/if/acd/ac_wrapper.h
index 03f17ed40..4dbb1dee7 100644
--- a/src/map/if/acd/ac_wrapper.h
+++ b/src/map/if/acd/ac_wrapper.h
@@ -20,6 +20,12 @@
 #ifndef __ACD_WRAPPER_H_
 #define __ACD_WRAPPER_H_
 
+#ifdef _MSC_VER
+#  include <numeric>      // std::iota
+#  include <intrin.h>
+#  define __builtin_popcount __popcnt
+#endif
+
 #include "misc/util/abc_global.h"
 #include "map/if/if.h"