[petsc-dev] Sean is going to love this

[Jed Brown]

Geoff Oxberry <goxberry at gmail.com> writes:
> Brew bottles were originally only used in situations where building from
> source would take a long time, and under the assumption that most users are
> interested in a "standard" build without any command-line options.

The dependency model assumes that flags do not change the binary
interface.  This relates to the two things hard in Computer Science:
cache invalidation and naming things.  I think Homebrew is refusing to
acknowledge that different binary interfaces need different "names".
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