GitLab

We can't easily predict what the output directory will be for a Github
release archive.  Get fetch_unpack to tell us.  Add some tests that
won't fail, but at least show us the output.

https://travis-ci.org/matthew-brett/multibuild/jobs/382564348#L2248

Resolution option 2-1 for https://github.com/matthew-brett/multibuild/issues/116

Add libtool, flex, and bison.

flex must be fetched from the released archive, rather
than the GitHub autogenerated source.

The archives directory was not created. I tested this downstream and the fix worked.

Fetch OpenBLAS from wheels.scipy.org rather than building it.

Resolution option 2-1 for https://github.com/matthew-brett/multibuild/issues/116

Add libtool, flex, and bison.

flex must be fetched from the released archive, rather
than the GitHub autogenerated source.

The archives directory was not created. I tested this downstream and the fix worked.

Fetch OpenBLAS from wheels.scipy.org rather than building it.

* [library_builders] use brew to install openblas

Yields better performance on OSX

* [tst:library_builders] add openblas

* [tst:library_builders] update homebrew

* fix bash

* [library_builders] force openblas link

* ENH: libraries: add a build_github function

* FIX: use name stamp

* MAINT: remove noop

* [tst:library_builders] add build_github