nanosleep.patch

diff --git a/src/graphics.cpp b/src/graphics.cpp
index 01e80c7..300bebb 100644
--- a/src/graphics.cpp
+++ b/src/graphics.cpp
@@ -34,6 +34,7 @@
 #include "etc-internal.h"
 #include "binding.h"
 #include "perftimer.h"
+#include "debugwriter.h"
 
 #include <SDL_video.h>
 #include <SDL_timer.h>
@@ -41,6 +42,7 @@
 
 #include <time.h>
 #include <sys/time.h>
+#include <errno.h>
 #include <algorithm>
 
 struct PingPong
@@ -342,8 +344,19 @@ private:
 		struct timespec req;
 		req.tv_sec = 0;
 		req.tv_nsec = ticks / tickFreqNS;
+		errno = 0;
+
 		while (nanosleep(&req, &req) == -1)
-			;
+		{
+			int err = errno;
+			errno = 0;
+
+			if (err == EINTR)
+				continue;
+
+			Debug() << "nanosleep failed. errno:" << err << "ticks:" << ticks;
+			break;
+		}
 #else
 		SDL_Delay(ticks / tickFreqMS);
 #endif