How to get xcb/xcb_icccm.h [duplicate]
Solution 1:
Usually I use the followying way to search a file in all entire repositories:
$ sudo apt install apt-file
$ sudo apt-file update
$ apt-file search xcb/xcb_icccm.h
libxcb-icccm4-dev: /usr/include/xcb/xcb_icccm.h
Or use online search at packages.ubuntu.com.