GNU bug report logs - #35666
[PATCH 0/2] Build a thread-safe hdf5 library

Previous Next

Full log

Message #17 received at 35666 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludovic.courtes <at> inria.fr>
To: Ricardo Wurmus <rekado <at> elephly.net>
Cc: bavier <at> cray.com, 35666 <at> debbugs.gnu.org, pgarlick <at> tourbillion-technology.com
Subject: Re: [bug#35666] [PATCH 0/2] Build a thread-safe hdf5 library
Date: Fri, 10 May 2019 15:07:29 +0200

Hi!

Ricardo Wurmus <rekado <at> elephly.net> skribis:

> Ludovic Courtès <ludo <at> gnu.org> writes:

[…]

>> It also tells you that, if you insist, you can go ahead and pass
>> ‘--enable-unsupported’, but you’re on your own.
>>
>> We found that Debian chose to pass ‘--enable-unsupported’, and indeed
>> that seems to be saner than providing a variant that does very little,
>> but does it in a thread-safe way.
>
> What other effects does “--enable-unsupported” have?  I see that in
> Fedora “--enable-threadsafe” was removed in 2008 because it’s
> “incompatible with --enable-cxx and --enable-fortran”.

“--enable-unsupported” allows you to force a build that combines C++,
Fortran, and thread-safety.  If you don’t pass that flag, you have to
choose between thread-safety and C++/Fortran¹.  A tough choice!

> Instead they seem to be building different flavours: one with
> --enable-fortran, another with --enable-cxx, yet another with MPI and
> --enable-parallel.

Problem is, my colleagues have code that expects both C++ and
thread-safety (as crazy as it might seem).  They were using the Debian
package until now and hadn’t realized about this.

> Do we have contact to the hdf5 developers to ask what the implications
> of “enable-unsupported” are?

I think it’s a warranty-void kind of flag: by passing it, the user
asserts they understand they’re using a configuration not “officially
supported” by the HDF Group, meaning that if it’s buggy, we’re on our
own.

Thoughts?

Ludo’.

¹ You would think it’s an April fool’s day prank, but it’s not!  We’re
  in May, at least in my timezone.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.