[bug #45728] .VARIABLES not updated after undefine

[Andreas Schwab]

URL:
  <http://savannah.gnu.org/bugs/?45728>

                 Summary: .VARIABLES not updated after undefine
                 Project: make
            Submitted by: schwab
            Submitted on: Mo 10 Aug 2015 15:23:58 CEST
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 4.0
        Operating System: Any
           Fixed Release: None
           Triage Status: None

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Details:

This makefile demonstrates a bug in the expansion of .VARIABLES:

$ cat Makefile.variables
MY_one := 1
MY_two := 2
$(foreach v, $(filter MY_%, $(.VARIABLES)), $(eval undefine $v))
MY_foo := foo
MY_bar := bar
all:; @echo MY Variables = $(filter MY_%, $(.VARIABLES))
$ make -f Makefile.variables
MY Variables = MY_one MY_two




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