XGetWMSizeHints(3) on Linux
The text 9b414bdfd429, as Debian 10 (Buster) shipped it.
allocate size hints structure and set or read a window's WM_NORMAL_HINTS property
The text 9b414bdfd429, as Debian 10 (Buster) shipped it.
allocate size hints structure and set or read a window's WM_NORMAL_HINTS property