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update docs for updated CMake support with MinGW

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This commit is contained in:
Axel Kohlmeyer
2020-03-19 11:09:27 -04:00
parent 38edf20d08
commit 3d0fc4a112
1 changed files with 10 additions and 4 deletions
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14
doc/src/Build_windows.rst
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@ -83,10 +83,16 @@ traditional build system, but CMake has also been successfully tested
using the mingw32-cmake and mingw64-cmake wrappers that are bundled
with the cross-compiler environment on Fedora machines. A CMake preset
selecting all packages compatible with this cross-compilation build
is provided. You will likely need to disable the GPU package unless you
download and install the contents of the pre-compiled `OpenCL ICD loader library <https://download.lammps.org/thirdparty/opencl-win-devel.tar.gz>`_
into your MinGW64 cross-compiler environment. The cross-compilation
currently will only produce non-MPI serial binaries.
is provided. The GPU package can only be compiled with OpenCL support
and you need to download and install the pre-compiled
`OpenCL ICD loader library <https://download.lammps.org/thirdparty/opencl-win-devel.tar.gz>`_
into your MinGW64 cross-compiler environment. With CMake this will be
done transparently. To compile with MPI support, a pre-compiled
library and the corresponding header files are required. There is
`one package for 32-bit Windows <https://download.lammps.org/thirdparty/mpich2-win32-devel.tar.gz>`_
and `a second package for 64-bit Windows <https://download.lammps.org/thirdparty/mpich2-win64-devel.tar.gz>`_.
When building with CMake, the matching package will be downloaded
automatically, but MPI support has to be explicitly enabled with ``-DBUILD_MPI=on``.
Please keep in mind, though, that this only applies to **compiling** LAMMPS.
Whether the resulting binaries do work correctly is not tested by the