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Add ecl
The Windows failure seems to be related to https://github.com/stonier/ecl_lite , not https://github.com/stonier/ecl_core . In particular, it seems that ECL_HAS_WIN_TIMERS is not defined at the preprocessor level and so the function is not defined: https://github.com/stonier/ecl_lite/blob/7f03e914d8aa6cb816f12b82e9b793d19c6ebe3c/ecl_time_lite/src/lib/date.cpp#L14 . As there is a #cmakedefine ECL_HAS_WIN_TIMERS in https://github.com/stonier/ecl_lite/blob/7f03e914d8aa6cb816f12b82e9b793d19c6ebe3c/ecl_time_lite/include/ecl/time_lite/config.hpp.in#L85 , probably it is sufficient to set ECL_HAS_WIN_TIMERS at the CMake level, if possible during the CMake invocation, or just by patching the CMakeLists.txt
The macOS failure may be trickier, it seems that the related class is not enabled if we are on Apple, see https://github.com/stonier/ecl_core/blob/b8e8e10e0f5abfc63aeeac88000bacd0a85e1f9c/ecl_devices/include/ecl/devices/socket_client_pos.hpp#L22 .