From 4fb5a791b08f4817cca93564d435e6624b4edb74 Mon Sep 17 00:00:00 2001
From: Glenn Strauss <gstrauss@gluelogic.com>
Date: Tue, 4 Jun 2019 21:16:03 -0400
Subject: [PATCH] [core] __attribute_pure__

---
 src/first.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/first.h b/src/first.h
index caa19c14..5dc1ad03 100644
--- a/src/first.h
+++ b/src/first.h
@@ -129,5 +129,14 @@
 #endif
 #endif
 
+#ifndef __attribute_pure__
+#if __has_attribute(pure) \
+ || __GNUC_PREREQ(2,96)
+#define __attribute_pure__(x)  __attribute__((__pure__ x))
+#else
+#define __attribute_pure__(x)
+#endif
+#endif
+
 
 #endif