Use the MFC library for an executable or dll.
Enables the use of the Microsoft Foundation Classes (MFC). It should be set to 1 for the static MFC library, and 2 for the shared MFC library. This is used in Visual Studio project files.
Usage example:
add_definitions(-D_AFXDLL)
set(CMAKE_MFC_FLAG 2)
add_executable(CMakeSetup WIN32 ${SRCS})
Contents of CMAKE_MFC_FLAG may use generator expressions.
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Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.19/variable/CMAKE_MFC_FLAG.html