Author :
Azat Khuzhin
Date :
2018-11-05 17:04:47
Hash :cb8b6f17 Message :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).
(cherry picked from commit 54fdd6bb6ebe6b0a672c79d30a712d97536500c8)