LINK_FLAGS
Additional flags to use when linking this target if it is a shared library, module library, or an executable. Static libraries need to use STATIC_LIBRARY_OPTIONS or STATIC_LIBRARY_FLAGS properties.
The LINK_FLAGS property, managed as a string, can be used to add extra flags to the link step of a target. LINK_FLAGS_<CONFIG> will add to the configuration <CONFIG>, for example, DEBUG, RELEASE, MINSIZEREL, RELWITHDEBINFO, …
Note
This property has been superseded by LINK_OPTIONS property.
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https://cmake.org/cmake/help/v3.17/prop_tgt/LINK_FLAGS.html