Alexander Neumann da839ba61a
[lapack] add metaport lapack to switch lapack impl with an overlay (#12464)
* [lapack-select] add port lapack-select to select the lapack implementation

* move (!osx) check into lapack select

* correct the platform selection logic so that clapack is not forced.
added external as a feature.
made a dummy project to find the external provided LAPACK

* fix the oscx regression. Actually need to specify external dependency on OSX

* rename port to lapack and use build-depends
2020-08-06 22:10:15 -07:00
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