Re: make: warn/error on expanding undefined vars?

[christos%astron.com@localhost (Christos Zoulas)]

In article <20170310154141.GL4373%trav.math.uni-bonn.de@localhost>,
Edgar Fuß  <ef%math.uni-bonn.de@localhost> wrote:
>> That used to be the original behavior...
>Which one? Warning or substituting the empty string?
>Either way, one would of course need an option to activate the change in 
>behaviour.

Warning (was the original behavior), but it is not applied everywhere...

christos