Windows

Running DDSCAT on Windows

Windows 7.3.3 release [year 2020]

In approximately 2019 Microsoft started to provide Windows Subsystem for Linux. It works on Windows 10 and provides native Linux on Windows. It is very simple to install. Therefore, this is now the prefered way to compile DDSCAT on Windows. One should ignore notes below. In this release we do not offer Windows binaries yet - just follow the manual to compile the code on Linux (which, under the Windows Subsystem for Linux, is just one of the Windows applications).

Windows 7.3 Release

Release

If you use Windows you should be able to run DDSCAT by downloading just 3 files - executable "ddscat.exe", example input file "ddscat.par" and example dieletric constant file "diel.tab". Native Windows executables do not require additional libraries. There are 2 versions - single and double precision; use the single precision. Note that these codes were compiled with basic options without optimizations. If you plan to do large multiprocessor calculations you may want to recompile the code from the source.

* Download ddscat…exe executable file (it has extension .exe)
* Download ddscat…par file, rename it to ddscat.par
* Download example dielectric constant tabulation
* Place ddscat.exe ddscat.par in the same directory and diel.tab in ../diel directory (or make simple modification in ddscat.par to point to diel.tab file)
* Enter windows command mode ("run" and "cmd")
* Execute DDSCAT by entering ddscat.exe in the Windows command mode

There are other options to run the code on Windows. One possibility it to install Sun Virtualbox add Ubuntu Linux operating system. Install gfortran under Ubuntu. Once this is done you can follow instructions provided in the DDSCAT user manual (i.e. compile the code).

Notes on how native Windows executables for DDSCAT 7.3.0 were made. Piotr J. Flatau, ude.dscu|uatalfp#ude.dscu|uatalfp, June 9, 2013, GNU Copyright Draine & Flatau 2013

64-bit

The way I have created 64 bit mingw

Go to

http://sourceforge.net/projects/mingwbuilds/
and download file "mingw-builds-install.exe"
This is executable file and it will install 64 bit "gfortran" (among other things)

During the installation of "mingw-builds-install.exe" one has to define options
Architecture: x64 (of course)
Threads: win32 (NOTE: there is another option - "posix" but if this is specified one needs libwinpthread-1.dll library during linking step)

This install files in directory
c:/Program files/mingw-builds/x64-4.8.1-win32-seh-rev5/mingw

Install also 32-bit MinGW/MSYS because his provides some additional programs such as "make"

http://sourceforge.net/projects/mingw/files/Installer/

http://www.mingw.org/wiki/Getting_Started

To compile 64 bit application one needs to run 64-bit (not 32-bit) terminal which is located here

start/all programs/Mingw by mingw-builds-project
x64-4.8.1-win32-seh-rev5
run terminal

Now you can compile 64 bit DDSCAT by moving to proper directory and
cd c:/ddscat/src
make all

Compiled with nompi, nomkl,nomp using gfortran and

LFLAGS = -static-libgcc -static-libgfortran
after compilation tested libraries

ojdump -x ddscat.exe | grep "DLL"

KERNEL32.dll
msvcrt.dll
USER32.dll

32-bit

• In directory ddscat7.3.9_130527_ingle32_gfortran_nomp_nompi_nomkl there is already precompiled ddscat.exe. You can run examples using this executable file on Windows computer. Notice that this is NOT optimal version of an executable of DDSCAT. This version is in fact the most basic one so users can run the code and get familiar with DDSCAT fast on various Windows machines.

Overall we still think that the best strategy is to use LINUX operating system (or alike) to run DDSCAT. But you can compile DDSCAT (we tested it) with Intel compiler and MKL/OpenMP, MPI support on Windows.
You don't have to use MinGW shell on Windows but it is easier that way. Also, we run DDSCAT on Windows from command prompt and did not tested Visual Studio compilation. What I have done to compile DDSCAT on Windows:

• Downloaded ddscat7.3.0_130527.tgz and ddscat7.3.0_examples_130526.tgz from GOOGLE CODE DDSCAT https://code.google.com/p/ddscat/

• MinGW Installation. You will need MinGW to run DDSCAT easily. It is free at http://www.mingw.org/
• Install MinGW and add paths to System Environment Control Panel/Advanced system Settings opens system Properties Window/Environmental Variables. In System Variables add c:\MinGW\bin;c:\MinGW\msys\1.0\bin;C:* Installation of ddscat7.3.0.130527_single32_gfortran_nomp_nompi_nomkl
• MinGW32
• GFORTRAN
• Single precision
• 32 bit gfortran compiler (i.e. THERE IS 2Gbyte MEMORY LIMIT)
• Without OPENMP, Witout MPI, Without MKL option
• Eddited Makefile and added these lines (gfortran section)
• LFLAGS = -static-libgcc -static-libgfortran
• MKLROOT =
• INCLUDE =
• make all (it build ddscat.exe and other executables). I have tested that
• objdump -x ddscat.exe | grep "DLL" command (it should give KERNEL32.dll, msvcrt.dll).
• I have tested that example ELLIPSOID works. Notice that all tests and compilation were done in MinGW shell window
• All Programs/MinGW/MinGW Shell

Windows 7.2 Release (OBSOLETE)

This Windows release is based on "gfortran". User Guide contains description of options to run and compile DDSCAT on Windows.

The executable file discussed in "native executable" section was compiled using “gfortran” in the MINGW environment (http://www.mingw.org/). Once you have MINGW and MSYS installed, in “all programs” there is now the MinGW program "MinGW shell". Once you open this shell one can now compile Fortran code using "gfortran". The
"make" and "tar" utilities are available. The command "pwd" shows which directory corresponds to the
initial "MinGW" shell. For example it can be "/home/Piotr" which corresponds to windows directory
"c:\mingw\msys\1.0\home\piotr".
You now need to copy ddscat.tar files and untar them. To make a native executable, edit "Makefile" so that the "LFLAGS" string is defined to be
LFLAGS=-static-libgcc -static-libgfortran
and then execute "make all". The resulting ddscat.exe doesn’t require any non-windows libraries. This can be checked with the
objdump -x ddscat.exe | grep "DLL"
command (it should give KERNEL32.dll, msvcrt.dll).

Windows code contains documentation, examples, source code, and binaries. We use Inno Setup5 to create self-extracting file.

Windows 7.1 Release (OBSOLETE)

Windows Distribution (NOTE. These executable codes should NOT be used for benchmark purposes because they were not optimized)

File	Description	Purpose	Notes
DDSCAT.exe	DDSCAT	REQUIRED Calculates scattering	G95 -O2 -mno-cygwin, single precision, CYGWIN (use this version)
DDSCAT.exe	DDSCAT	Calculates scattering	G95 -O2 -mno-cygwin, double precision, CYGWIN
ddscat.par	ddscat.par	REQUIRED input file	download and rename to ddscat.par
diel.tab	diel.tab	REQUIRED defines dielectric constant	keep in ../diel directory
CALLTARGET.exe	Calltarget	Create shape file	G95 -O2 -mno-cygwin, single precision, CYGWIN
DDFIELD.exe	DDFIELD	Calculate near field	G95 -O2 -mno-cygwin, single precision, CYGWIN