From: Ole Streicher <olebole@debian.org>
Date: Thu, 24 Nov 2016 14:31:06 +0100
Subject: Make the check for NFS a bit more portable (BSD)

And provide a fallback (f.e. for HURD).However, there is probably no
real use case for that, since also other file systems may be slow or
lack certain features.
---
 casa/OS/Directory.cc | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/casa/OS/Directory.cc b/casa/OS/Directory.cc
index 82e6efc..b79ce0f 100644
--- a/casa/OS/Directory.cc
+++ b/casa/OS/Directory.cc
@@ -488,29 +488,38 @@ Vector<String> Directory::shellExpand (const Vector<String>& files, Bool stripPa
    return expInNames;
 }
 
-#ifndef __APPLE__
+#if defined(__linux__)
 #include <sys/vfs.h>
-#include <linux//nfs_fs.h>
-#else
+#include <linux/nfs_fs.h>
+#elif defined( __APPLE__)
 #include <sys/param.h>
 #include <sys/mount.h>
 #include <sys/vnode.h>
+#elif defined(__FreeBSD_kernel__)
+#include <sys/mount.h>
+#include <sys/param.h>
+#include <stdlib.h>
 #endif
 
 Bool Directory::isNFSMounted() const
 {
+#if defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD_kernel__)
    struct statfs buf;
    if (statfs (itsFile.path().expandedName().chars(), &buf) < 0) {
       throw (AipsError ("Directory::isNFSMounted error on " +
             itsFile.path().expandedName() +
             ": " + strerror(errno)));
    }
-#ifndef __APPLE__
+#endif
+#if defined(__linux__)
    return buf.f_type == NFS_SUPER_MAGIC;
-#else
+#elif defined(__APPLE__)
    return buf.f_type == VT_NFS;
+#elif defined(__FreeBSD_kernel__)
+   return strcmp (buf.f_fstypename, "nfs") == 0;
+#else
+   return False;
 #endif
-
 }
 
 } //# NAMESPACE CASACORE - END