From df94dfc0ee825442f804dc2f5b69f04063c2e622 Mon Sep 17 00:00:00 2001
From: Marius Greuel <greuelm@mgtek.com>
Date: Wed, 5 Jan 2022 16:52:41 +0100
Subject: [PATCH] Replace MSVC implementation of __builtin_popcount with C code

---
 src/msvc/msvc_compat.h | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/msvc/msvc_compat.h b/src/msvc/msvc_compat.h
index 19acf5b8..03bb178e 100644
--- a/src/msvc/msvc_compat.h
+++ b/src/msvc/msvc_compat.h
@@ -36,10 +36,21 @@
 
 #define PATH_MAX _MAX_PATH
 
-#define __builtin_popcount __popcnt 
-
 #define setvbuf msvc_setvbuf
 
+static inline int __builtin_popcount(unsigned int v)
+{
+    int count = 0;
+
+    while (v)
+    {
+        count += v & 1;
+        v >>= 1;
+    }
+
+    return count;
+}
+
 static inline int msvc_setvbuf(
     FILE* const public_stream,
     char* const buffer,