[LTP] [PATCH] configure.ac: fix mount_attr detection

[Fabrice Fontaine]

Commit b857f8723f30a4b9554bf6b0ff8fa52fd07e8b60 tried to fix build with
latest glibc which provides mount_attr in sys/mount.h. Unfortunately,
the following build failure is still raised because sys/mount is now
unconditionally included in include/lapi/fsmount.h:

In file included from fsconfig01.c:9:
../../../../include/lapi/fsmount.h:55:8: error: redefinition of 'struct mount_attr'
   55 | struct mount_attr {
      |        ^~~~~~~~~~
In file included from ../../../../include/lapi/fsmount.h:14:
/home/autobuild/autobuild/instance-4/output-1/host/armeb-buildroot-linux-gnueabi/sysroot/usr/include/sys/mount.h:210:8: note: originally defined here
  210 | struct mount_attr
      |        ^~~~~~~~~~

Fixes:
 - http://autobuild.buildroot.org/results/4dbb72e1bf081afd3cd944571b9beeefc7608865

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
---
 configure.ac | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index c2b0f48e7..a6d8ac826 100644
--- a/configure.ac
+++ b/configure.ac
@@ -225,10 +225,10 @@ AC_CHECK_TYPES([struct __kernel_old_timeval, struct __kernel_old_timespec, struc
 
 AC_CHECK_TYPES([struct futex_waitv],,,[#include <linux/futex.h>])
 AC_CHECK_TYPES([struct mount_attr],,,[
-#ifdef HAVE_LINUX_MOUNT_H
-# include <linux/mount.h>
-#else
+#ifdef HAVE_MOUNT_SETATTR
 # include <sys/mount.h>
+#elif HAVE_LINUX_MOUNT_H
+# include <linux/mount.h>
 #endif
 ])
 
-- 
2.39.1