From 036c7b63c00db58d1781e697c3a122f60493e005 Mon Sep 17 00:00:00 2001
From: Martin Willi <martin@revosec.ch>
Date: Thu, 19 Mar 2015 15:58:59 +0100
Subject: [PATCH] configure: Check for __int128 type support

---
 configure.ac | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/configure.ac b/configure.ac
index 73c288495..1cd4f2453 100644
--- a/configure.ac
+++ b/configure.ac
@@ -697,6 +697,17 @@ AC_COMPILE_IFELSE(
 	[AC_MSG_RESULT([no])]
 )
 
+AC_MSG_CHECKING([for __int128])
+AC_COMPILE_IFELSE(
+	[AC_LANG_PROGRAM(
+		[[#include <sys/types.h>]],
+		[[__int128 x = 0;
+		  return x;]])],
+	[AC_MSG_RESULT([yes]);
+	 AC_DEFINE([HAVE_INT128], [], [have __int128 type support])],
+	[AC_MSG_RESULT([no])]
+)
+
 AC_MSG_CHECKING([for GCC __sync operations])
 AC_RUN_IFELSE([AC_LANG_SOURCE(
 	[[