[yt-dev] Install script issue

[Andrew Myers]

Hi Matt,

Yeah, I think that would be great. This was actually on the Berkeley Astro
department cluster Henyey, so I'm not sure how immediately relevant a
specific warning would be to people at other institutions, but a note that
having something in CFLAGS can potentially mess up your h5py module could
save people some time down the road.

-Andrew M

On Tue, Apr 3, 2012 at 6:34 AM, Matthew Turk <matthewturk at gmail.com> wrote:

> Hi Andrew,
>
> Sorry for the delay in replying, and thanks for reporting this.  Do
> you think it would be sufficient to just detect if CFLAGS is not empty
> and report that to the user, noting that it could cause issues?
>
> Also, if you don't mind my asking, which supercomputer was this?  We
> can put a note in the script about the modules.
>
> -Matt
>
> On Fri, Mar 30, 2012 at 9:45 PM, Andrew Myers <atmyers at berkeley.edu>
> wrote:
> > Hello yt developers,
> >
> > I don't know if this is a "bug," exactly, but I noticed an issue when
> doing
> > a clean install of yt today involving the h5py install. Namely, it looks
> > like if you have an non-empty CFLAGS environment variable (which can
> happen
> > without your knowledge if you load certain module files in a
> supercomputing
> > environment, for example), the h5py build will proceed without getting
> the
> > "-fno-strict-aliasing" flag and the resulting module will not work. You
> can
> > get around this either by 1) clobbering CFLAGS, or 2) adding
> > "-fno-strict-aliasing" to it and re-running the script.
> >
> > It seems like the install script should either detect this and work
> around
> > it, or else warn you that the h5py build has gone of the rails after the
> > installation, because the tracebacks you get from trying to use the
> > whacked-out h5py module are not very illuminating. I would do this
> myself,
> > but I'm not sure my shell scripting skills are up to the task.
> >
> > Thanks,
> > Andrew
> >
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