Installing PETSc On Microsoft Windows#
Are You Sure?
Are you sure you want to use Microsoft Windows? We recommend using Linux if possible (and minimize troubleshooting Microsoft Windows related issues).
Recommended Installation Methods#
The following configurations are much like regular Unix-like systems. Our regular
(Unix-like) instructions should work with them. Most external packages will also work. The
should work for these systems. Note however that these do not support Microsoft/Intel
Windows compilers; nor can you use MS-MPI, Intel-MPI or MPICH2).
Cygwin Unix emulator for Microsoft Windows. See the instructions below for installing Cygwin for PETSc.
Be sure to install the GNU compilers, and commons components, do not use the
gcc-core gcc-g++ gcc-fortran
openmpi libopenmpi-devel libhwloc-devel libevent-devel zlib-devel
MSYS2. See more details below.
Microsoft Windows Subsystem for Linux 2 (WLS2). Largely untested, let us know your experience. Be sure to use WSL2 vs WSL1 for best performance.
Docker for Microsoft Windows. Untested, let us know your experience.
Installation With Microsoft/Intel Windows Compilers#
Microsoft Windows does not provide the same Unix shell environment as the other OSes. Also
the default Microsoft/Intel compilers behave differently than other Unix compilers. So to
install PETSc on Microsoft Windows - one has to install Cygwin (for the Unix environment)
win32fe 1 (located at
interface to Microsoft/Intel compilers).
Download and install Cygwin from http://www.cygwin.com and make sure the following components are installed:
Make sure the following Cygwin components are installed:
(default selection should already have diff and other tools)
Additional Cygwin components like git and CMake can be useful for installing external packages.
Remove Cygwin link.exe:
Cygwin link.exe can conflict with Intel ifort compiler. If you are using ifort - do (from Cygwin terminal/bash-shell):
$ mv /usr/bin/link.exe /usr/bin/link-cygwin.exe
Setup Cygwin terminal/bash-shell with Working Compilers:
We require the compilers to be setup properly in a Cygwin bash command shell, so that
ifort foo.fworks from this shell. For example - if using VS2005 C and Intel 10 Fortran one can do:
Start > Programs > Intel Software Development Tools > Intel Fortran Compiler 10 > Visual Fortran Build Environment (32-bit or 64-bit depending on your usage). This should start a “dos cmd” shell.
Within this shell - run Cygwin terminal/bash-shell
Verify if the compilers are useable (by running cl, ifort in this Cygwin terminal/bash-shell).
win32fe1 and then build the libraries with make (as per the usual instructions)
Example Configure Usage With Microsoft Windows Compilers#
configure with VC2005 C and Intel Fortran 10 (without MPI):
$ ./configure --with-cc='win32fe cl' --with-fc='win32fe ifort' --with-cxx='win32fe cl' --with-mpi=0 --download-fblaslapack
If fortran, c++ usage is not required, use:
$ ./configure --with-cc='win32fe cl' --with-fc=0 --with-cxx=0 --download-f2cblaslapack
We support both MS-MPI [64-bit] and Intel MPI on Microsoft Windows (MPICH2 does not work,
do not use it). For example usages, check
Avoid spaces in $PATH
Its best to avoid spaces or similar special chars when specifying
configure options. On
Microsoft Windows - this usually affects specifying MPI or MKL. Microsoft Windows
supports dos short form for dir names - so its best to use this notation. Cygwin
cygpath can be used to get paths in this notation. For example:
$ cygpath -u `cygpath -ms '/cygdrive/c/Program Files (x86)/Microsoft SDKs/MPI'`
$ cygpath -u `cygpath -ms '/cygdrive/c/Program Files (x86)/IntelSWTools/compilers_and_libraries/windows/mkl/lib/intel64'`
Then use in
configure as follows:
$ ./configure --with-cc='win32fe cl' --with-fc='win32fe ifort' --with-cxx='win32fe cl' \
--with-mpi-lib='-L/cygdrive/c/PROGRA~2/MICROS~2/MPI/lib/x64 msmpifec.lib msmpi.lib' \
--with-blaslapack-lib='-L/cygdrive/c/PROGRA~2/INTELS~1/COMPIL~2/windows/mkl/lib/intel64 mkl_intel_lp64_dll.lib mkl_sequential_dll.lib mkl_core_dll.lib'
--download-package option works with many external packages on Microsoft Windows, but there may be some portability issues with others.
Let us know your experience and we will either try to fix them or report them upstream.
We cannot provide Microsoft Visual Studio project files for users as they are specific to
configure options, location of external packages,
compiler versions etc. used for any given build of PETSc, so they are potentially
different for each build of PETSc. So if you need a project file for use with PETSc -
do the following.
Create an empty project file with one of the examples say
Try compiling the example from Cygwin bash shell - using makefile - i.e.:
$ cd $PETSC_DIR/src/ksp/ksp/tutorials $ make ex2
If the above works - then make sure all the compiler/linker options used by
makeare also present in the project file in the correct notation.
If errors - redo the above step. If all the options are correctly specified, the example should compile from MSDev.
Running PETSc probrams with
-start_in_debugger is not supported on this platform, so debuggers will need to be initiated manually. Make sure your environment is properly configured to use the appropriate debugger for your compiler. The debuggers can be initiated using Microsoft Visual Studio 6:
$ msdev ex1.exe
Microsoft Visual Studio .NET:
$ devenv ex1.exe
Intel Enhanced Debugger:
$ edb ex1.exe
or GNU Debugger
$ gdb ex1.exe
Notes On Using Other Systems Besides Cygwin To Compile With Microsoft/Intel Compilers#
For any alternate system, we would have to redo
win32fe 1 functionality for
that system. This includes:
Marshal Unix type compiler options to Cl (Microsoft compiler).
Convert paths in some of these options from this system (for example Cygwin paths) to Microsoft Windows paths.
Have python that works with system path notation.
Have the ability equivalent to Microsoft Windows process spawning; Cygwin process spawning produces Microsoft Windows processes. WSL1 lacked this.
Installation With MSYS2 and MinGW Compilers#
This allows one to build standalone Microsoft Windows libraries and applications that are compatible with the Microsoft and Intel compilers.
Install MSYS2 and MS-MPI:
Download and install MSYS2 from https://www.msys2.org. If you want to use MPI, we recommend you use MS-MPI from https://learn.microsoft.com/en-us/message-passing-interface/microsoft-mpi.
Update MSYS2 and install base packages:
First, launch a MSYS2 MinGW x64 shell. Double-check this is the proper type of shell by typing
$ echo $MINGW_PREFIX /mingw64
If you see something else, e.g.,
/clang64, this is not the correct type of shell, it may still work, but this is less tested. Then, update your installation using
pacman(you may be asked to quit and re-open your shell).
$ pacman -Syu
Install the following packages that are needed by some PETSc dependencies.
$ pacman -S autoconf automake-wrapper bison bsdcpio make git \ mingw-w64-x86_64-toolchain patch python flex \ pkg-config pkgfile tar unzip mingw-w64-x86_64-cmake \ mingw-w64-x86_64-msmpi mingw-w64-x86_64-openblas mingw-w64-x86_64-jq
The two difficulties here are: 1) make sure PETSc configure picks up the proper Python installation, as there are more than one available in a MSYS2 MinGW shell and 2) tell PETSc where is MS-MPI
mpiexec. We also recommend not to use shared libraries as it is easier to create standalone binaries that way.
$ /usr/bin/python ./configure --with-mpiexec='/C/Program\ Files/Microsoft\ MPI/Bin/mpiexec' \ --with-shared-libraries=0