[dpdk-dev] [PATCH v5 4/8] eal: sys/queue.h implementation for windows

Jeff Shaw jeffrey.b.shaw at intel.com
Tue Mar 26 22:54:41 CET 2019

On Tue, Mar 26, 2019 at 10:47:54PM +0100, Thomas Monjalon wrote:
> 26/03/2019 22:14, Jeff Shaw:
> > On Tue, Mar 26, 2019 at 09:52:57PM +0100, Thomas Monjalon wrote:
> > > Even better would be to get it as a dependency outside of DPDK.
> > > Where this code come from?
> > > How other projects on Windows get it?
> > 
> > It comes from FreeBSD 12.0, specifically
> >   https://github.com/freebsd/freebsd/blob/releng/12.0/sys/sys/queue.h
> > 
> > It has been modified such that only the parts used by DPDK (i.e. TAILQ) are
> > implemented. The other stuff has been deleted. Windows does not have sys/queue.h,
> > so we reproduce it here.
> > 
> > Would it better to have this as a dependency outside of DPDK? I think pulling a file
> > from the internet and applying a patch (where we'd have to maintain a patch file
> > inside of DPDK's repo anyway) would be overkill when we just need a few lines of
> > code that will change very infrequently.
> We already try to get the libbsd dependency on Linux.
> Why not mandate libbsd for Windows?
> It has this header file and a lot more:
> 	https://gitlab.freedesktop.org/libbsd/libbsd/blob/master/include/bsd/sys/queue.h
> Relying on libbsd may avoid copying other files for Windows port.

I like that idea, though it doesn't look like libbsd builds on Windows, do you
know of a Windows version or one that doesn't depend on autotools to build?

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