From c804460f5dbe0cc673cf95298285a3afa87fd232 Mon Sep 17 00:00:00 2001
From: Josh Blum <josh@joshknows.com>
Date: Sun, 6 Dec 2015 17:10:25 -0800
Subject: [PATCH] provide NAN define for MSVC older than VC12

This fixes a minor compile issue on VC11 and below
where source_impl.cc and sink_impl.cc use the float NAN define.
The patch simply defines the NAN macro conditionally,
in a common header (which seemed like the best place).
---
 lib/config.h.in | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/config.h.in b/lib/config.h.in
index 66c3e1b..542b364 100644
--- a/lib/config.h.in
+++ b/lib/config.h.in
@@ -18,4 +18,10 @@
 #cmakedefine ENABLE_AIRSPY
 #cmakedefine ENABLE_SOAPY
 
+//provide NAN define for MSVC older than VC12
+#if defined(_MSC_VER) && (_MSC_VER < 1800)
+#include <limits>
+#define NAN std::numeric_limits<double>::quiet_NaN()
+#endif
+
 #endif // CONFIG_H_IN