Summary: Introduce "Circular <file> <- <file> dependency
dropped." for .EXTRA_PREREQS deps.
                 Project: make
            Submitted by: dgoncharov
            Submitted on: Sun 06 Jun 2021 01:33:46 AM UTC
                Severity: 3 - Normal
              Item Group: Enhancement
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: SCM
        Operating System: None
           Fixed Release: None
           Triage Status: None



Introduce "Circular <file> <- <file> dependency dropped." for .EXTRA_PREREQS

$ cat makefile2
hello.x: ; touch $@
hello.x: .EXTRA_PREREQS:=hello.x
$ make -f makefile2
touch hello.x

"make: Circular hello.x <- hello.x dependency dropped." is missing.

The message is useful and make prints it in the case of a regular (as opposite
to .EXTRA_PREREQS) circular dependency.


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