CMake/Modules/Platform/CYGWIN.cmake

SET(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-shared -Wl,--export-all-symbols -Wl,--enable-auto-import")
SET(CMAKE_DL_LIBS "-lgdi32" )
SET(CMAKE_SHARED_LIBRARY_PREFIX "lib")
SET(CMAKE_SHARED_LIBRARY_SUFFIX ".dll")
# no pic for gcc on cygwin
SET(CMAKE_SHARED_LIBRARY_C_FLAGS "")
SET(CMAKE_SHARED_LIBRARY_CXX_FLAGS "")
SET(CMAKE_EXECUTABLE_SUFFIX ".exe")          # .exe