[ofiwg] ofiwg item: supporting other OS's

Jeff Hammond jeff.science at gmail.com
Fri Jan 8 11:13:09 PST 2016

Does libfabric assume C99?  MSVC is not a C99 compiler and never will be,
according to every source I've ever seen (e.g.
which links to MSFT docs that I cannot access).

Of course, Intel and others support a C99 compiler for Windows, but if
Windows support implies supporting the platform's default compiler, then we
need to worry about what MSVC supports.  Perhaps there is some automatic
hook for Intel compilers in Visual Studio that mitigates the ISO
shortcomings of MSVC.  Clang may also be an option (

Given the choice between limiting libfabric to a subset of C99 and not
supporting Windows, I vote for C99 100 times out of 100.



On Fri, Jan 8, 2016 at 10:57 AM, Jeff Squyres (jsquyres) <jsquyres at cisco.com
> wrote:

> On Jan 8, 2016, at 1:15 PM, Hefty, Sean <sean.hefty at intel.com> wrote:
> >
> > As a discussion item for the next ofiwg, the topic has come up (again)
> about supporting other operating systems, specifically Windows and Solaris.
> I would imagine that supporting Solaris with the configury/build/sockets
> providers wouldn't be too difficult...?
> I don't know much about Windows to comment on it.
> > At least two development teams have asked about support outside of
> Linux.  The desire is to code only to libfabric, with it dealing with
> differences in the underlying interfaces.  This is partially driven by the
> socket provider support inside libfabric, which allows for applications to
> remove their support for sockets.
> >
> > This in turn is driving the need for the sockets provider to focus on
> performance and scalability, rather than just functionality, which was the
> original goal.
> Is it worth forking the sockets provider -- one for "simple" correctness
> (and not performance), and another optimized provider for sockets?
> --
> Jeff Squyres
> jsquyres at cisco.com
> For corporate legal information go to:
> http://www.cisco.com/web/about/doing_business/legal/cri/
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Jeff Hammond
jeff.science at gmail.com
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