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

[Mike Haboustak]

Follow-up Comment #7, bug #28456 (project make):

I've encountered this inconsistency when trying to use secondary expansion.
When a default rule is not defined, any rule without a recipe has $<
overridden with $@. I've added a patch that avoids comparing null file
commands and a regression test.

(file #47201, file #47202)
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Additional Item Attachment:

File name: 0001-Don-t-override-when-no-default-rule-has-been-defined.patch
Size:0 KB
   
<https://savannah.gnu.org/file/0001-Don-t-override-when-no-default-rule-has-been-defined.patch?file_id=47201>

File name: 0002-Add-regression-test-for-default-rule-override.patch Size:1 KB
   
<https://savannah.gnu.org/file/0002-Add-regression-test-for-default-rule-override.patch?file_id=47202>



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