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    Suggestion 
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    Resolution: Invalid
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     Not Evaluated Not Evaluated
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    None
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    1.2.0
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    None
libraries should always be specified by full path, and -L/-l flags should be only constructed to invoke the linker if actually needed.
from this follows, that libraryPaths is an unnecessary property for the toolchain.
fwiw, a somewhat equivalent property will be necessary for configure probes which need to locate external dependencies first, but that's a different matter.