$ make install:

$ PREFIX=/usr make install

* /usr/local/bin/wppd
* /usr/local/bin/moonclock
* /usr/local/lib/wppd
* /usr/local/share/wppd/moon/E-MoonClock-??.png

* wppd --help    prints usage
* wppd [--timeout=SEC] [--shuffle=on|off] [--moon=on|off] 
       [--walldir=dir] [--moonpos=pos] [--save]
    
       --moon = on|off - draw a phase os moon.
       --moonpos = NorthWest|North|NorthEast|West
               |Center|East|SouthWest|South|SouthEast
       --walldir = dir - Directory where wallpapers stored.
    
* wppd delete|next|kill
           - remote control

* moonclock
           - prints the moon phase, it is file in /usr/[local]/share/wppd/moon/

$HOME/.config/wppd/config