Re: PI3 vs. PI4 - libpthread possible issue?

[Bill Dailey, MD, MSEng, MSMI]

I have gpsd working on a pi4 with a lora/gps hat.  Heat sinks only.  Using pps and feeding ntpsec

Works like a charm.  Temp runs 48-50c

Stable time...as near as I can tell.. . 

associd=0 status=0115 leap_none, sync_pps, 1 event, clock_sync,
leap=00, stratum=1, precision=-19, rootdelay=0.0, rootdisp=1.9, refid=PPS,
reftime=e18f7976.4216bc8a 2019-12-02T11:52:22.258Z, tc=6, peer=11347,
offset=-8.2e-05, frequency=-18.348846, sys_jitter=0.000391,
clk_jitter=0.000612, clock=e18f79b2.58f3b65b 2019-12-02T11:53:22.347Z,
processor="armv7l", system="Linux/4.19.75-v7l+",
version="ntpd ntpsec-1.1.8+ 2019-12-02T00:46:48Z (git rev dd6785a)",
clk_wander=2.2e-05, tai=37, leapsec="2017-01-01", expire="2020-06-28T",
mintc=0

bill

On Sat, Nov 30, 2019 at 4:49 PM Gary E. Miller <address@hidden> wrote:

Yo scorpion7!

On Fri, 29 Nov 2019 16:27:57 -0500
scorpion7 <address@hidden> wrote:

> however ran into something that may have a related to concern if one
> were to attempt to compile gpsd on a PI4 with Raspbian (lite/buster).
>  Short version ___ both utilize the Adafruit Ultimate GPS Hat with the
> notion that the PI4 (4G version) would be a ___drop-in___ replacement for
> the PI3B+ and the PI3 would be utilized as a time keeper elsewhere.

I do not make the assumption.  If you see gpsd doc that implies that then
pleasse point it out.

The Pi4 needs a fan, and any GPS HAT prevents that.

> Thus, only two logical ___differences___ is the PI ___itself___ and the fact
> that the PI3 started out with a much earlier version of Raspbian, but
> has seen regularly updates/upgrades of the OS.

Uh,  no.  Raspibian, and the many other OS that run on the Pi's load
different modeuls on the Pi3 and Pi4.  The c compiler also compiles
differently for the Pi3 and Pi4.

> If you are using a Pi4 ___ ntpd won___t even complete the ___configure___
> portion.

NTP Classic?  NTPsec?  Bug reports for those belong on their mailing lists.

> possible issue(s) for gpsd as it fails on the libpthread requirement.

Which is still unconfirmed by anyone else.

> ./configure \

gpsd does not use configure.  This does not belong on a gpsd list.

> Anyone happen to run into this on a PI4?

Too many bugs on the Pi4, I am waiting the next hardware revision.

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        address@hidden  Tel:+1 541 382 8588

            Veritas liberabit vos. -- Quid est veritas?
    "If you can't measure it, you can't improve it." - Lord Kelvin

--

Doc

Bill Dailey
KXØO