Building libdvdcss DLL for Windows using MinGW

$ sudo apt install mingw-w64 build-essential

$ cd
$ mkdir mingw && cd mingw
$ wget https://download.videolan.org/pub/libdvdcss/1.4.2/libdvdcss-1.4.2.tar.bz2
$ tar jxvf libdvdcss-1.4.2.tar.bz2
$ cd libdvdcss-1.4.2
$ ./configure --host=x86_64-w64-mingw32
$ make
$ make DESTDIR=~/mingw install-strip

The resulting DLL is saved at ~/mingw/usr/local/bin/libdvdcss-2.dll.

Note: For a 32-bit build, use the configure option "--host=i686-w64-mingw32" instead.