GSoC 2020: [rtems/rsb]: Error while adding ptp support. This time building for xilinx_zynq_a9_qemu

[Jan.Sommer at dlr.de]

Hello,

We came across the PPSi library for PTP support some time ago: https://ohwr.org/project/ppsi
In their documentation its says they started with ptpd and then made an overhaul of the source code.
They also claim portability as one of their goals. We haven't had time to look at it closer yet, but the projects looks a bit more active and seems to have the CERN behind it.
Maybe it is worth checking out, if ptpd keeps making trouble.

Cheers,

    Jan


> -----Original Message-----
> From: devel [mailto:devel-bounces at rtems.org] On Behalf Of Sebastian
> Huber
> Sent: Friday, June 5, 2020 6:09 AM
> To: Mritunjay Sharma
> Cc: RTEMS Devel
> Subject: Re: GSoC 2020: [rtems/rsb]: Error while adding ptp support. This
> time building for xilinx_zynq_a9_qemu
> 
> On 04/06/2020 20:29, Mritunjay Sharma wrote:
> 
> >
> >
> > On Thu, Jun 4, 2020 at 11:07 PM Sebastian Huber
> > <sebastian.huber at embedded-brains.de
> > <mailto:sebastian.huber at embedded-brains.de>> wrote:
> >
> >     On 04/06/2020 16:22, Gedare Bloom wrote:
> >
> >     >>> In the github version this code is conditional on sys/cpuset.h
> >     being present.
> >     >>>
> >     > Well, we do have a sys/cpuset.h in newlib. It doesn't have these BSD
> >     > definitions though. Probably either:
> >     > 1. Add more stuff to sys/cpuset.h to make it support BSDisms. This
> >     > would mean adding cpuset_setaffinity support in rtems, I guess.
> >     > 2. Figure out how to disable the conditional code using the
> >     > cpuset_setaffinity function.
> >     The <sys/cpuset.h> is already as compatible as possible to glibc and
> >     FreeBSD. There is always room for improvement, however, in this
> >     area it
> >     will be difficult.
> >
> >
> > Please it would be kind of you all to guide on what is the best thing
> > I can do next. It is looking
> > a little difficult. If something similar has been done earlier,
> > sharing it can be a lot helpful to take a cue.
> 
> Configure scripts are sometimes confused that Newlib provides the glibc
> and FreeBSD CPU set APIs. In this case it seems a FreeBSD system was
> detected and it tries to use some proprietary system calls such as
> cpuset_setaffinity(). If you encounter things like this, I would look at
> the man page:
> 
> https://www.freebsd.org/cgi/man.cgi?query=cpuset_setaffinity&apropos=0
> &sektion=0&manpath=FreeBSD+12.1-RELEASE&arch=default&format=html
> 
> Then you have to evaluate if this stuff makes sense on RTEMS. Is it
> really needed? Otherwise you can disable it via an #ifndef __rtems__ define.
> 
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