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authorBoris Kolpackov <boris@codesynthesis.com>2022-09-05 13:33:44 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2022-09-05 13:40:04 +0200
commit52296a1e3e57bdfa80003f37b63f4f263734e2c0 (patch)
tree3b6eceff0d0f8d2af60e31b1772cf39407222c8b /libbuild2/bin
parentcd6b44707cefff2be90343c8c1f7e6751d5f5d01 (diff)
Allow empty prerequisites in prerequisite-specific variable assignment/block
The old semantics was not very consistent, consider: exe{foo}: cxx{$empty} # Ok. exe{foo}: cxx{$empty}: include = false # Not ok? So now both are ok, as well as the block variant: exe{foo}: cxx{$empty}: { include = false } Note that the empty prerequisite list in the dependency chain is still an error: ./: exe{$empty}: cxx{foo} # Error. Note also that the syntactically-empty prerequisite list was and still is an error: exe{foo}: : include = false # Error.
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