[bug #28456] Expansion of $$< is incorrect

[Robert Bogomip]

Follow-up Comment #6, bug #28456 (project make):

The handling of *$<* under *SECONDEXPANSION* seems well broken as of 4.2.1.

With an implicit rule:


    $ cat Makefile
    .SECONDEXPANSION:
    %.2: %.1 $$(info [$$<] address@hidden) ; : $@ Success

    $ ls
    foo.1 Makefile

    $ make foo.2
    [foo.2] [foo.2]
    : foo.2 Success


Notice that $< expands to the target rather than a pre-requisite (!).

The situation for explicit rules is arguably worse:


    $ cat Makefile
    .SECONDEXPANSION:
    foo.2: %.2: %.1 $$(info [$$<] address@hidden) ; : $@ Success

    $ ls
    foo.1 Makefile

    $ make foo.2
    [] [foo.2]
    : foo.2 Success


$< is now empty. Can't find any syntax to change this.

Current cygwin make BTW


    $ make --version
    GNU Make 4.2.1
    Built for x86_64-unknown-cygwin
    Copyright (C) 1988-2016 Free Software Foundation, Inc.


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