[bug #37237] Second exapnsion with substitution confuse parser:

[Paul D. Smith]

Update of bug #37237 (project make):

                  Status:                    None => Not A Bug              
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #1:

GNU make's behavior here is correct.  Because the ":" does not appear within a
known macro reference (because the "$" is escaped), it's treated as part of
the rule.  This makes the rule appear to be a static pattern rule, which is
missing a "%", and hence the error.  In other words, make parses this into
words as follows: "dir/hello.o", ":", "$$(@F", ":", and ".o=.c)".

To make this work right you need to escape the ":" from make, like so:

dir/hello.o: $$(@F\:.o=.c)


This works in CVS make but I'm not sure it will work in earlier versions;
there have been some issues with escaping in target and prerequisite lists.

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