DDLab Cygwin readme: September 2023 update
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This  executable is ddlabz11_cygwin32.exe, compiled in Windows 7, 32 bit
for Cygwin/X, a Linux environment running in Windows
available at
http://www.ddlab.org/download/ddlab_compiled_Sept2023/ and mirror sites.

ddlabz11_cygwin32.tar.gz unpacks to give
ddlabz11_cygwin32.exe and GNU_GPL_3.txt

Your Cygwin/X must have the default packages, 
and also xorg-x11-base, xorg-x11-devel, xorg-x11-fnts.

To run DDLab:
* double click the Cygwin Terminal icon
* a small Cygwin terminal will open -- inside enter "startx"
* after a delay, a large black Cygwin terminal appears,
  then after another delay, 3 white sub-terminals appear inside.
  (use linux commands, i.e. "ls" to list files)
* in one of the sub-terminals change to the subdirectory with the DDLab files,
  $ cd ddlabz11 
* enter the name of the executable preceded by ./ and followed by &
  $ ./ddlabz11_cygwin32 &

* alternatively, first change to sub-directory "ddfiles",
  then enter the name of the executable preceded by ../ and followed by &
  $ ../ddlabz11_cygwin32 &

DDlab should run just like the Linux or Mac versions, but much slower.
Separate runs can be made concurrently in each sub-terminal.

To exit, in the large black Cygwin terminal, click top-right red X,
or left-click the top band and select "close".
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To compile DDLab:
* double lick the Cygwin icon.
  a terminal will open, inside ...
* enter "startx", to get a cygwin window with 3 sub-terminals inside
* change to the directory with the DDLab source code and the Makefile
  (the Makefile is the same as for Linux)
* enter: "make -f Makefile_Linux_z11" (or the name of the Makefile)
  (if the Makefile is renamed "Makefile" simply enter "make")
* if the compile is successful, ddlabz11.exe (or the file name set
  in the Makefile) is created. 
* run as described above.
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