From 87cc32adc11b3db914dd63e3766614a02e2f988f Mon Sep 17 00:00:00 2001
From: Shaun Tancheff <stancheff@cray.com>
Date: Tue, 10 Dec 2019 03:20:26 -0600
Subject: [PATCH] LU-12904 utils: zfs properly detect spa_multihost

spa_multihost is used in a user space tool and the
compile test for spa_multihost reflect that.

Test-Parameters: trivial
Cray-bug-id: LUS-8042
Signed-off-by: Shaun Tancheff <stancheff@cray.com>
Change-Id: Ie85fffb80e84a2b65547e3d48dc0cff31c3325b4
Reviewed-on: https://review.whamcloud.com/36582
Reviewed-by: Nathaniel Clark <nclark@whamcloud.com>
Reviewed-by: Petros Koutoupis <pkoutoupis@cray.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Olaf Faaland-LLNL <faaland1@llnl.gov>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
---
 config/lustre-build-zfs.m4 | 25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/config/lustre-build-zfs.m4 b/config/lustre-build-zfs.m4
index 80dfcff..f632df1 100644
--- a/config/lustre-build-zfs.m4
+++ b/config/lustre-build-zfs.m4
@@ -548,15 +548,24 @@ your distribution.
 		dnl #
 		dnl # ZFS 0.7.0 feature: MULTIHOST
 		dnl #
-		LB_CHECK_COMPILE([if ZFS has multihost protection],
-		spa_multihost, [
-			#include <sys/spa.h>
-		],[
+		restore_CFLAGS=$CFLAGS
+		CFLAGS="$CFLAGS $ZFS_LIBZFS_INCLUDE -Werror"
+		AC_MSG_CHECKING([[if ZFS has multihost protection]])
+		AC_COMPILE_IFELSE([
+		  AC_LANG_PROGRAM(
+		  [[
+		    #define _LARGEFILE64_SOURCE 1
+		    #include <sys/sysmacros.h>
+		    #include <sys/spa.h>
+		  ]], [[
 			spa_multihost(NULL);
-		],[
-			AC_DEFINE(HAVE_ZFS_MULTIHOST, 1,
-				[Have multihost protection in ZFS])
-		])
+		  ]])
+		  ],[
+		  AC_DEFINE(HAVE_ZFS_MULTIHOST, 1,
+			[Have multihost protection in ZFS])
+		  spa_multihost_fn="yes"],[spa_multihost_fn="no"]),
+		AC_MSG_RESULT([$spa_multihost_fn])
+		CFLAGS=$restore_CFLAGS
 		dnl #
 		dnl # ZFS 0.7.x adds new method zap_lookup_by_dnode
 		dnl #
-- 
1.8.3.1