Get libhandle working on IRIX for qa. Put back fd_to_handle.

Merge of master-melb:xfs-cmds:23053a by kenmcd.

m4/package_xfslibs.m4

@@ -76,6 +76,19 @@ AC_DEFUN([AC_PACKAGE_NEED_ATTRLIST_LIBHANDLE],
     AC_SUBST(libhdl)
   ])
 
+AC_DEFUN([AC_PACKAGE_NEED_IRIX_LIBHANDLE],
+  [ 
+    AC_MSG_CHECKING([libhandle.a for IRIX])
+    libhdl="`pwd`/../irix/libhandle/libhandle.a"
+    if ! test -f $libhdl; then
+	echo 'no'
+        echo 'FATAL ERROR: could not find IRIX XFS handle library.'
+        exit 1
+    fi
+    echo 'yes'
+    AC_SUBST(libhdl)
+  ])
+
 AC_DEFUN([AC_PACKAGE_NEED_XFSCTL_MACRO],
   [ AC_MSG_CHECKING([xfsctl from xfs/libxfs.h])
     AC_TRY_LINK([#include <xfs/libxfs.h>], [ int x = xfsctl(0, 0, 0, 0); ],