On 11 Jan 2024 10:50, Neal Frager wrote:
> +  [case x"$withval" in

use AS_CASE

> +	x/*) ;;
> +	*)
> +	with_tooldir=
> +	AC_MSG_WARN([argument to --with-tooldir must be an absolute path])

shouldn't this be AC_MSG_ERROR ?  otherwise you're leaving it unset below.
-mike