From c57e63b31d0a657b81e233563188b6b2ee513b03 Mon Sep 17 00:00:00 2001
From: "Wladimir J. van der Laan" <laanwj@gmail.com>
Date: Thu, 27 Dec 2018 18:35:06 +0100
Subject: [PATCH] tools: Add missing unistd.h header

`close` was implicitly defined, include `unistd.h` to define it
explicitly so that the FreeBSD compile succeeds.
---
 tools/headerversions.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/headerversions.c b/tools/headerversions.c
index 8adf4ef35..0dde4efad 100644
--- a/tools/headerversions.c
+++ b/tools/headerversions.c
@@ -10,6 +10,7 @@
 #include <sqlite3.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <unistd.h>
 #include <zlib.h>
 
 static const char template[] =