CMAKE_<LANG>_IMPLICIT_LINK_LIBRARIES

Compilers typically pass language runtime library names and other flags when they invoke a linker. These flags are implicit link options for the compiler’s language. CMake automatically detects these libraries and flags for each language and reports the results in this variable.

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https://cmake.org/cmake/help/v3.15/variable/CMAKE_LANG_IMPLICIT_LINK_LIBRARIES.html