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Update Windows/LLVM build to use miniforge and flang_win-64 package

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Martin Kroeker
2025-12-27 22:33:01 +01:00
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1 changed files with 8 additions and 6 deletions
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docs/install.md
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@@ -217,8 +217,11 @@ in this section, since the process for each is quite different.
For Visual Studio, you can use CMake to generate Visual Studio solution files;
note that you will need at least CMake 3.11 for linking to work correctly).
Note that you need a Fortran compiler if you plan to build and use the LAPACK
functions included with OpenBLAS. The sections below describe using either
Note that you need a Fortran compiler if you plan to build and use the latest version
of the LAPACK functions included with OpenBLAS. (If you do not have a Fortran compiler
installed, you can build an older version of the LAPACK sources that has been converted
to C - but its performance will likely be slower and accuracy may be poorer too.)
The sections below describe using either
`flang` as an add-on to clang/LLVM or `gfortran` as part of MinGW for this
purpose. If you want to use the Intel Fortran compiler (`ifort` or `ifx`) for
this, be sure to also use the Intel C compiler (`icc` or `icx`) for building
@@ -231,15 +234,14 @@ to grab all of the tools we need, since some of them are in an experimental
status. Before you begin, you'll need to have Microsoft Visual Studio 2015 or
newer installed.
1. Install Miniconda3 for 64-bit Windows using `winget install --id Anaconda.Miniconda3`,
or easily download from [conda.io](https://docs.conda.io/en/latest/miniconda.html).
1. Install Miniforge for 64-bit Windows with the latest version of the installer Miniforge3-Windows-x86_64.exe
available on [github.com](https://github.com/conda-forge/miniforge/releases/)
2. Open the "Anaconda Command Prompt" now available in the Start Menu, or at `%USERPROFILE%\miniconda3\shell\condabin\conda-hook.ps1`.
3. In that command prompt window, use `cd` to change to the directory where you want to build OpenBLAS.
4. Now install all of the tools we need:
```
conda update -n base conda
conda config --add channels conda-forge
conda install -y cmake flang clangdev perl libflang ninja
conda install -y cmake flang_win-64 clangdev perl libflang ninja
```
5. Still in the Anaconda Command Prompt window, activate the 64-bit MSVC environment with `vcvarsall x64`.
On Windows 11 with Visual Studio 2022, this would be done by invoking: