Added in version 3.29.
This controls how the value of the CMAKE_<LANG>_USING_LINKER_<TYPE>
variable should be interpreted. The supported linker mode values are:
FLAG
CMAKE_<LANG>_USING_LINKER_<TYPE>
holds a
semicolon-separated list of flags to be passed
to the compiler frontend. This is also the default behavior if
CMAKE_<LANG>_USING_LINKER_MODE
is not set.
TOOL
CMAKE_<LANG>_USING_LINKER_<TYPE>
holds the path to the linker
tool.