Subject: Re: make: make :P work as intended.
To: Alan Barrett <email@example.com>
From: Simon J. Gerraty <firstname.lastname@example.org>
Date: 03/18/2006 08:29:00
>> Also, documented a nasty quirk of :=
>> Normally, expansion is not done until the variable is referenced.
>> +.Em NOTE :
>> +References to undefined variables are
>> +.Em not
>> +expanded. This can cause problems when variable modifiers are used.
>Is that really desired behaviour that should be documented? It looks to
>me like a bug that should be fixed.
That's what I was planning to do yesterday. But the code and comments
show that the behavior is very deliberate (other than the bit with
modifiers ;-), so I figured changing it was likely to do more harm than
good. I did wonder whether an undefined variable
that is being referenced with modifiers, should be handled differently
bug again that just makes things more complex.
So, since I was punting, documenting the kwirk is the next best thing.