I have an almost fresh Win10 installation with MariaDB 10.1.9 installed with .msi installer from this link (I believe)  https://downloads.mariadb.org/interstitial/mariadb-10.0.21/win32-packages/mariadb-10.0.21-win32.msi/from/http%3A//mirror.one.com/mariadb/. No older version has been installed on this system ever. 

The folder C:\Program Files\MariaDB 10.1\include\mysql and its subfolders have a large number of ".h" files. Isn't this a build script bug? 

-- Peter

-- Webyog