Scid vs. PC configure - Makefile configuration program Tcl/Tk version: 8.6 Your operating system is: Linux 4.15.0-24-generic Location of "tcl.h": not found Location of "tk.h": not found Location of Tcl 8.6 library: /usr/lib/x86_64-linux-gnu Location of Tk 8.6 library: /usr/lib/x86_64-linux-gnu Location of X11 library: /usr/lib/x86_64-linux-gnu Checking if your system already has zlib installed: no. Error: compiler g++ does not support C++11.