Re: Problems with conditional sources

[John Calcote]

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Andreas Schwab wrote:
> John Calcote <address@hidden> writes:
> 
>> Make is a two-pass utility. The first pass completely assimilates all
>> macro data specified in the Makefile. THEN, the second pass generates
>> the rule dependency tree.
> 
> This is not true.  Variable refences in target and dependency lists are
> expanded when they are read.  Any later redefinition will not change
> them.
> 
> Andreas.
> 

This is only true if you use ':=' assignment. In this case (only),
variable *assignments* are expanded immediately. But regular rule or
command references are only expanded when the rule or command is
evaluated (as opposed to read).

John
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