Add macro roundl for compilers without said function.
diff --git a/miner.h b/miner.h
index 57fa774..1e42c6f 100644
--- a/miner.h
+++ b/miner.h
@@ -159,6 +159,10 @@ void *alloca (size_t);
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
#endif
+#ifndef roundl
+#define roundl(x) (long double)((long long)((x==0)?0.0:((x)+((x)>0)?0.5:-0.5)))
+#endif
+
enum alive {
LIFE_WELL,
LIFE_SICK,