Commit 54fdd6bb6ebe6b0a672c79d30a712d97536500c8
2018-11-05T17:04:47
appveyor: cache build directory to reduce overall time (6x time faster) various build checks (i.e. detecting headers/macroses/functions) takes 7 minutes (from 13 minutes in total) for cmake, which is too high. By using cache we can reduce this to ~0. And set APPVEYOR_SAVE_CACHE_ON_ERROR so that cmake checks will be cached (anyway all sources will be built from scratch due to timestamp updates while extracting from sources).