From 9b153dc2ef5002a85108d9aa7858a90fabfdbc8a Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@mit.edu>
Date: Sun, 12 Mar 2017 12:50:10 -0600
Subject: [PATCH] Only enable arm64 CRC32 acceleration if the required header
 files are there

If the necessary header files are missing, then fio will bomb out when
building on arm64.  So disable the hardware acceleration option in
that case, since it's only performance improvement and not a
functional regression to turn it off.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jens Axboe <axboe@fb.com>
---
 configure | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/configure b/configure
index 7b557112..a7610b15 100755
--- a/configure
+++ b/configure
@@ -1943,6 +1943,10 @@ if test "$march_armv8_a_crc_crypto" != "yes" ; then
 fi
 if test "$cpu" = "arm64" ; then
   cat > $TMPC <<EOF
+#include <sys/auxv.h>
+#include <arm_acle.h>
+#include <arm_neon.h>
+
 int main(void)
 {
   return 0;
-- 
2.25.1