From 965eda947d4c847c6e520317b57024b4586507ec Mon Sep 17 00:00:00 2001
From: Jon Turney <jon.turney@dronecode.org.uk>
Date: Thu, 25 Apr 2019 23:11:08 +0100
Subject: [PATCH] mi: Provide ffs when compiling using MinGW

I don't know how I feel about the promise made in 2e7f790b :)
---
 mi/mibitblt.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mi/mibitblt.c b/mi/mibitblt.c
index 4f7e29170..84f8da65a 100644
--- a/mi/mibitblt.c
+++ b/mi/mibitblt.c
@@ -62,6 +62,10 @@ SOFTWARE.
 #include <X11/Xmd.h>
 #include "servermd.h"
 
+#ifdef __MINGW32__
+#define ffs __builtin_ffs
+#endif
+
 /* MICOPYAREA -- public entry for the CopyArea request
  * For each rectangle in the source region
  *     get the pixels with GetSpans