From 2eb941a3d3a69fa8a73902b29564294f854fc3b0 Mon Sep 17 00:00:00 2001
From: Jason Evans <jasone@canonware.com>
Date: Fri, 10 Oct 2014 20:40:43 -0700
Subject: [PATCH] Add AC_CACHE_CHECK() for pause instruction.

This supports cross compilation.
---
 configure.ac | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index f8c09c46..cc30da93 100644
--- a/configure.ac
+++ b/configure.ac
@@ -207,9 +207,10 @@ dnl CPU-specific settings.
 CPU_SPINWAIT=""
 case "${host_cpu}" in
   i686|x86_64)
-	JE_COMPILABLE([pause instruction], [],
-	              [[__asm__ volatile("pause"); return 0;]],
-	              [je_cv_pause])
+	AC_CACHE_CHECK([whether pause instruction is compilable], [je_cv_pause],
+	  [JE_COMPILABLE([pause instruction], [],
+	                [[__asm__ volatile("pause"); return 0;]],
+	                [je_cv_pause])])
 	if test "x${je_cv_pause}" = "xyes" ; then
 	    CPU_SPINWAIT='__asm__ volatile("pause")'
 	fi