-AC_MSG_WARN(Where should I put the downloaded library? Note: the directory and all the files and subdirectories recursively in it should be world writeable)
-read HELM_LIBRARY_PREFIX
+AC_MSG_CHECKING("for the library path")
+RES=""
+AC_CACHE_VAL(helm_cv_HELM_LIBRARY_PREFIX,
+ echo "Where should I put the downloaded library? Note: the directory and all the files and subdirectories recursively in it should be world writeable"
+ read helm_cv_HELM_LIBRARY_PREFIX
+ RES="Asked"
+)
+HELM_LIBRARY_PREFIX=$helm_cv_HELM_LIBRARY_PREFIX
+if test "$RES" != "Asked" ; then
+ AC_MSG_RESULT($HELM_LIBRARY_PREFIX)
+fi
+AC_CACHE_SAVE
+