@Neumann-A Thanks for your PR. I installed lapack-reference[cblas] and got the following error:

Building package lapack-reference[blas-select,cblas,core,noblas]:x64-windows... done
Installing package lapack-reference[blas-select,cblas,core,noblas]:x64-windows...
The following files are already installed in E:/Lily/pr/vcpkg/installed/x64-windows and are in conflict with lapack-reference:x64-windows

Installed by openblas:x64-windows
    include/cblas.h

@LilyWangL: noblas and cblas are by design incompatible. Still if openblas is installed there will be a file conflict between those two ports if lapack-reference is built with feature cblas.

Yes, if noblas and cblas are by design incompatible, blas-select should not be default feature. If blas-select is default feature, when I install lapack-reference[cblas], it will install lapack-reference[blas-select,cblas,core,noblas]. lapack-reference[cblas] will build failed on Windows.

blas-select needs to be the default feature otherwise ci and users don't get what they expect. People who explicitly want cblas must deactivate the defaults by explicitly declaring [core,cblas]. Feature cblas only exists for corner cases and should be treated as such.

The feature is also up for removal as soon as a native windows fortran compiler is available

Could add message for feature cblas to declare that this feature does not support windows temporarily?

Could add message for feature cblas to declare that this feature does not support windows temporarily?

It should support windows if you install it without the feature noblas

I test lapack-reference[cblas]:x64-windows-static and it can install successfully.

Building package lapack-reference[blas-select,cblas,core]:x64-windows-static... done
Installing package lapack-reference[blas-select,cblas,core]:x64-windows-static...
Installing package lapack-reference[blas-select,cblas,core]:x64-windows-static... done
Elapsed time for package lapack-reference:x64-windows-static: 6.92 min

Total elapsed time: 10.11 min

Thanks for your contribution!