@elextr libtool on Windows is the problem with the autotools build, I have no expectation that it can be made faster. My laptop is very old, raising an issue will not help that ;-) This pull is just doing what we always did when Enrico and I maintained the project, not over-including headers unnecessarily. There is no downside to this change, no one has pointed a valid one out. But I'm not interested in arguing about this anymore, Colomban is the maintainer so it's up to him.