Add AC_CACHE_CHECK() for pause instruction.

This supports cross compilation.
2014-10-10 20:40:43 -07:00 · 2014-10-10 20:40:43 -07:00 · 2eb941a3d3
commit 2eb941a3d3
parent 9b75677e53
1 changed files with 4 additions and 3 deletions
--- 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