Failure loading libblastrampoline on julia v1.9

[baggepinnen]

Hello Andreas, hope you're doing well!

A user of ControlSystems.jl recently reported an error calling lsminreal in Julia v1.9 running on Windows.
The error looks like this

(minreal is a thin wrapper around MatrixPencils.lsminreal)

I suspect the error stems from some manual management of the lapack installation in this package, a search came up with this line mentioning libblastrampoline explicitly

MatrixPencils.jl/src/lapackutil2.jl

Line 3 in 460e14a

const liblapack = VERSION < v"1.7" ? Base.liblapack_name : "libblastrampoline"

[andreasvarga]

I already mentioned this issue here. My hope was that it will be automatically addressed with Julia 1.9, but apparently it was not. Any proposal how to proceed further with this?

[baggepinnen]

This comment

It is not, that's the reason why we have Base.libblas_name: JuliaLang/julia#48435.

makes me think that this line

MatrixPencils.jl/src/lapackutil2.jl

Line 3 in 460e14a

const liblapack = VERSION < v"1.7" ? Base.liblapack_name : "libblastrampoline"

should remove the version check and always use Base.liblapack_name, since this variable will have the correct value for all OS platforms, see here

[andreasvarga]

Thanks. I implemented your proposal and performed exhaustive tests for Julia 1.6-1.10 on both Windows and Linux. The version v1.7.7 will fix this problem for all Julia versions.

The same modification needs to be also performed to MatrixEquations.

[baggepinnen]

Thanks for fixing!