From cc917d4b743c61d71a6ab9aca424cd3bcbb8df9f Mon Sep 17 00:00:00 2001
From: chad-iris <chad.trabant@iris.edu>
Date: Mon, 3 Apr 2017 21:12:22 -0700
Subject: [PATCH] Add define for F_OK on Windows if needed

---
 src/mseed2sac.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/mseed2sac.c b/src/mseed2sac.c
index dc24535..641ba78 100644
--- a/src/mseed2sac.c
+++ b/src/mseed2sac.c
@@ -26,6 +26,10 @@
 #if defined(WIN32) || defined(WIN64)
   #include <io.h>
   #define access _access
+
+  #ifndef F_OK
+    #define F_OK 0
+  #endif
 #endif
 
 #define VERSION "2.1"