CMAKE_CONFIG_POSTFIX
CMAKE_<CONFIG>_POSTFIX
Default filename postfix for libraries under configuration <CONFIG>.
When a non-executable target is created its <CONFIG>_POSTFIX target property is initialized with the value of this variable if it is set.
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Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.7/variable/CMAKE_CONFIG_POSTFIX.html
