[bug #35133] Pattern rules used as dependencies for .PRECIOUS don't actually do pattern matching

[Paul D. Smith]

Update of bug #35133 (project make):

              Item Group:                     Bug => Enhancement            

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Follow-up Comment #1:

The .PRECIOUS pseudo-target is behaving as documented:


You can also list the target pattern of an implicit rule (such as
`%.o') as a prerequisite file of the special target `.PRECIOUS' to
preserve intermediate files created by rules whose target patterns
match that file's name.


And so are pattern-specific variable assignments:


In addition to target-specific variable values, GNU `make'
supports pattern-specific variable values.  In this form, the
variable is defined for any target that matches the pattern
specified.


This is not a bug; the system is behaving as documented.

We can consider changing the behavior of, for example, the .PRECIOUS target so
that patterns simply match any target, like other pseudo-targets that take
patterns, but we'd have to think very carefully about the
backward-compatibility implications of this.  I'll leave this open as an
enhancement request.

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