Re: target-specific variables

[David Boyce]

At 09:38 AM 3/14/2004, Sven Köhler wrote:
> > I'd still like to use the $(shell ...) stuff and define a variable, but 
> > only if the target t1 is executed. Is there any trick to achieve that?
>
> ohh, i guess = instead of := does the trick, although the shell-command 
> will be executed many times if the variable is used many times.

It seems clearly documented to me, but here's an example anyway:

% cat Makefile
t1: hallo :=target 1

t1:
        echo $(hallo)

t2:
        echo $(hallo)

% make t1
echo target 1
target 1
% make t2
echo

%

-David Boyce