[yt-dev] Install script issue

[Matthew Turk]

Cool.  I committed this in 2af699ff04a4.

On Tue, Apr 3, 2012 at 11:49 AM, Andrew Myers <atmyers at berkeley.edu> wrote:
> 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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