selftest_prefix="./st"
AC_SUBST(selftest_prefix)
AC_ARG_WITH(selftest-prefix,
-[ --with-selftest-prefix=DIR The prefix where make test will be run ($selftest_prefix)],
+[AS_HELP_STRING([--with-selftest-prefix=DIR],[The prefix where make test will be run ($selftest_prefix)])],
[ case "$withval" in
yes|no)
AC_MSG_WARN([--with-selftest-prefix called without argument - will use default])