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Crosscompiling Maxima for Windows
=================================

On a Ubuntu/Debian System just install some tools for crosscompiling:

apt-get install g++-mingw-w64-i686 cmake nsis wine automake texinfo texlive texlive-plain-generic texlive-xetex rsync p7zip-full g++ gettext tcl pandoc po4a

(If you are using a 64 bit operating system, it might be necessary to add
the i386 architecture (https://wiki.debian.org/Multiarch/HOWTO) before).
If you want a 64Bit installer, install the compiler g++-mingw-w64-x86-64.

You will need CMake >= 3.7, if that is not included in your distribution,
download a recent CMake from https://cmake.org/files/

Then you can extract the Maxima sourcecode or clone the git repository
and start the crosscompiling-process:

mkdir crosscompile-windows/build
cd crosscompile-windows/build # change to the build directory
cmake ..  # use the right CMake executable (CMake >= 3.7)
make
make package

The build directory should be called "build", because the Maxima code
is copied during the build and this directory will be excluded.

This will download the required Software (CLISP, SBCL, Gnuplot, wxMaxima,
wxWidgets, Tcl, Tk, VTK) from the Internet into the directory
"crosscompile-windows/download".

The packages will be compiled (if necessary) and a Windows 
installer for Maxima is generated.

This should work (at least) on Ubuntu and Debian (I hope on other
Linux-Distributions too...).
(if you want you may even omit the first "make")

Instead of "make clean" just remove everything in the build directory.

If you want to use the current wxMaxima development version, you can use
cmake -DUSE_WXMAXIMA_GIT=YES ..

If you want to exclude VTK, use
cmake -DUSE_VTK=NO ..
(The size of the installer with VTK will approximately be 50% larger
than without VTK).

One can also include ABCL - a Java based lisp compiler - with the option
-DWITH_ABCL=YES
Of course you will need a java installation.

If you want to change the default Lisp, which will be used, you can
use the option "-DWITH_DEFAULT_LISP=sbcl" in the cmake call (otherwise
Clisp would be the default).


In case a new release of a software is released (and no new patches are needed),
it should be sufficient to just increase the version number and MD5-checksum
for the new release in CMakeLists.txt.


Building a 64 bit installer
===========================

By default a 32 bit installer (which works on 32 and 64 bit Windows) will be
generated. If you want to crosscompile a 64 bit installer, install the 64 bit
crosscompiler package (g++-mingw-w64-x86-64) and a recent 64 bit 'wine'.
(see https://www.winehq.org/download how to get a development version
for your Linux distribution). For the 64bit crosscompiliation procedure wine64
will be searched in /opt/wine-devel - where the packages from the wine team
will install their packages.

Then use the following commands to build a 64 bit installer:
cmake -DBUILD_64BIT=YES ..
make
make package


Installing the package
======================

Of course just by double-clicking/executing the generated EXE on
Windows. This Maxima installer installs into C:\maxima-VERSION,
changing this directory is not recommended (because special characters
or foreign language characters might cause problems).

If you want to do an *unattended* installation (e.g. if you plan to
install Maxima on many computers in a school, university or company),
this installer (and uninstaller) understands the command line switch
"/S" (for 'silent install').

To select a installation directory for a unattended installation, use
"/D=directory", e.g. to install to C:\maxima the command would be:
maxima-clisp-sbcl-VERSION-win32.exe /S /D=C:\maxima
This parameter must be the last one.

The installer supports components, you can deselect (by default a full
installation is done) some parts either during the installation process
or using the command line switches:
- VTK using the command line option /no_vtk
- Gnuplot using /no_gnuplot (installation is strongly recommended!)
- wxMaxima using /no_wxmaxima (installation is strongly recommended!)

These switches are mainly useful for an unattended installation.


Testing the installed package:
==============================

After building it, you can (and should) test the new Maxima installation 
package. Install it on Windows and check that the installation (and later
the deinstallation) works properly. To test Maxima, try the following:

 o Run the maxima testsuite: run_testsuite();
 o Try compiling a function.  This has been a problem in the past
    f(x):=x+2;
    compile(f);
    f(2);
 o Test the graphics systems in both xmaxima and wxmaxima
    plot2d(sin(x),[x,0,10]);
    plot2d(sin(x),[x,0,10],[plot_format,xmaxima]);
    plot3d(x*y,[x,-1,1],[y,-1,1]);
    plotdf([-y,x],[trajectory_at,5,0]);
    load(draw)$
    draw3d(xu_grid = 30, yv_grid = 60, surface_hide = true,
          parametric_surface(cos(phi) * sin(theta),
                       sin(phi) * sin(theta),
                       cos(theta),
                       theta, 0, %pi, phi, 0, 2 * %pi))$
 o Check that plotting to Postscript works
    plot2d(sin(x),[x,0,10],[ps_file,"ps_test.ps"]);
 o Try out the on-line help: describe(sin);
 o Try out, if external packages (e.g. lapack) work:
   load(lapack);
   fpprintprec : 6;
   M : matrix ([9.5, 1.75], [3.25, 10.45]);
   dgeev (M);

   should return the eigenvalues of M (and false, false since we did
   not compute eigenvectors: [[7.54331, 12.4067], false, false]

 o Try if double-clicking on a .wxmx file opens it
 o The wxMaxima source comes with a file (test/testbench_simple.wxmx)
   that tries to trigger everything that has gone wrong in previous
   wxMaxima builds.  They include the commands that will test the
   graphics system in the next step.
   Open that file and then select "Cells/Evaluate all cells" in this
   file and check if the file is processed correctly.


Further development / TODO:
===========================

More packages could be included in the Windows installer. 

- Userinterface: Emacs maxima/imaxima mode:
  Should be rather easy, there are Windows zip files which could be included.
  But the size of the Maxima installer would be *much* larger.
  (Discussion on the Maxima mailing list (2020-02-28), that that does not
  make much sense.
  Users should install Emacs / Miktex(or Texlive) by themselves, if they want
  to use that interface).
- Userinterface Climaxima (https://github.com/lokedhs/maxima-client):
  Might be possible, but many dependencies, which must be crosscompiled.
- rlwrap (https://github.com/hanslub42/rlwrap):
  would provide readline features (advanced command line editing) for
  command line Maxima, when using SBCL or ABCL (CLISP already supports this).
  Dependencies: readline and that requires either termcap or ncurses
  (and neither termcap nor ncurses can be crosscompiled here...)
- Other Lisp versions: 
  Must have a Windows port or be crosscompileable and be usable in Wine.
  I tried other Lisps, but currently only CLISP, SBCL and ABCL work.
  And including many more Lisp versions might confuse ordinary users.


Wolfgang Dautermann