From b7503986eaf7786c43d875b9c17653b7b85e77e4 Mon Sep 17 00:00:00 2001
From: Mike Black W9MDB <mdblack98@yahoo.com>
Date: Thu, 24 Feb 2022 17:34:49 -0600
Subject: [PATCH] Fix compilation on mingw for gmtime_r
 https://github.com/Hamlib/Hamlib/issues/813

---
 security/security.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/security/security.c b/security/security.c
index cd1d7dbd2..25215c5f9 100644
--- a/security/security.c
+++ b/security/security.c
@@ -28,6 +28,28 @@
 #include "password.h"
 #include "../src/misc.h"
 
+#if defined(_WIN32)
+// gmtime_r can be defined by mingw
+#ifndef gmtime_r
+static struct tm *gmtime_r(const time_t *t, struct tm *r)
+{
+    // gmtime is threadsafe in windows because it uses TLS
+    struct tm *theTm = gmtime(t);
+
+    if (theTm)
+    {
+        *r = *theTm;
+        return r;
+    }
+    else
+    {
+        return 0;
+    }
+}
+#endif // gmtime_r
+#endif // _WIN32
+
+
 // using tv_usec with a sleep gives a fairly good random number
 static int my_rand(int max)
 {