+dnl BSD find uses -perm +xxxx, GNU find has deprecated this syntax in favour of
+dnl -perm /xxx.
+AC_MSG_CHECKING([checking version of find])
+AS_IF([find --version 2>&1 | grep 'GNU'],
+ [ FINDPERM="/"
+ AC_MSG_RESULT([configuring for GNU find]) ],
+ [ FINDPERM="+"
+ AC_MSG_RESULT([configuring for BSD find]) ])
+
+AC_SUBST([FINDPERM])