[bug #20133] 'make -p' always uses ':=' for pattern-specific variable assignments

[Agent Zhang]

URL:
  <http://savannah.gnu.org/bugs/?20133>

                 Summary: 'make -p' always uses ':=' for pattern-specific
variable assignments
                 Project: make
            Submitted by: agent
            Submitted on: Saturday 06/09/2007 at 17:37
                Severity: 3 - Normal
              Item Group: Enhancement
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 3.81
        Operating System: Any
           Fixed Release: None

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Details:

Hi~

I've found that "make --print-data-base" produces the following bogus output
for the pattern-specific variable assignment "%.x: FOO = $(BAR)":

  # Pattern-specific Variable Values

  %.x :
  # makefile (from `a.mk', line 1)
  # FOO := $$(BAR)

You see, it's totally wrong...Also, 'make -p' lazily treats both "+=" and
"?=" as ":=". Sigh.

It's worth mentioning that target-specific variable assignments work fine
though.

As I mentioned earlier in bug-make that I've been building a makefile AST
evaluator in Perl atop the database printing feature of make. Now that I've
successfully passed 45% of the official test suite, fixing bugs like this
will definitely help me (and other people in the future?) proceed more
smoothly :)

Thanks!
agentz




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