Renaming "Makefile" to "Makefile.bak" Tcl/Tk version: 8.5 Your operating system is: CYGWIN_NT-6.1-WOW64 1.7.29(0.272/5/3) Location of "tcl.h": /usr/include Location of "tk.h": /usr/include Location of Tcl 8.5 library: /usr/lib Location of Tk 8.5 library: /usr/lib Location of X11 library: /usr/lib Checking if your system already has zlib installed: yes.