I've been working to get daily travis-ci cron-job manylinux builds
working for numpy and scipy wheels.   They are now working OK:


These are daily builds of the respective numpy and scipy master branches.

Numpy already has a system, kindly worked up by Olivier Grisel, which
uploads wheel builds from each travis-ci run. travis-ci uploads these
wheels for every commit, at the
"travis-dev-wheels" container on Rackspace, visible at
. These builds are specific to the Linux they were built on - in this
case Ubuntu 12.04.

Some projects use these per-commit builds for testing compatibility
with development Numpy code.

Now I'm wondering what the relationship should be between the current
every-commit builds and the new wheel builds.

I think that we should prefer the new wheel builds and deprecate the
previous per-commit builds, because:

* the new manylinux wheels are self-contained, and so can be installed
with pip without extra lines of `apt` installs;
* the manylinux builds work on any travis container, not just the current
12.04 container;
* manylinux builds should be faster, as they are linked against OpenBLAS;
* manylinux wheels are closer to the wheels we distribute for
releases, and therefore more useful for testing against.

What do y'all think?


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