[LinuxPPS] building ntpd for debian with nmea patch applied

[Hal V. Engel]

On Sunday 11 January 2009 09:34:28 Folkert van Heusden wrote:
> The method described at:
> http://wiki.enneenne.com/index.php/LinuxPPS_NTPD_support#Installation
> doesn't work. No pps device at all listed in the ntpq -c pe output.
>
> If you use this:
> CFLAGS="$CFLAGS -I/lib/modules/`uname -r`/build/include
> -I/lib/modules/`uname -r`/build/Documentation/pps -I /usr/include
> -DHAVE_PPSAPI" LDFLAGS=-lrt ./configure --prefix=/usr/local/ntp
> --disable-all-clocks --disable-parse-clocks --enable-NMEA
> --enable-LOCAL-CLOCK
>
> It *does* work. Bonus is that you do NOT need to fiddle around with
> header-files as described here:
> http://wiki.enneenne.com/index.php/LinuxPPS_installation#Header_files

I agree that this section of the current docs are screwball.   What this 
section should say is to make sure you have the correct header files for your 
base kernel installed and to copy (or soft link) timepps.h to /usr/include and 
pps.h to /usr/include/linux.  This is much simpler than what is in the current 
docs and it also messes with your system a lot less.  At that point you don't 
need the CFLAGS setting you used and it will just work.  This is the way I 
handle it on my system.

>
> Then it is just a matter of:
>
> /usr/local/sbin/ppsldisc -d /dev/ttyS1 -v
> /usr/local/ntp/bin/ntpd -g
>
> (you might notice that the ppsldisc included in Rodolpho's doesn't
> accept the parameters as seen above, for that use the patch which can be
> found here: http://vanheusden.com/Linux/ppsldisc.patch.bz2 )

You may have missed it but it appears that the kernel folks want to do away 
with ppsldisc either by including it's functionality in ldattach or by 
reverting back to setserial.  No one is sure why or which approach they want 
to now use.

see

http://marc.info/?l=linux-kernel&m=123128283515544&w=2

and

http://marc.info/?l=linux-kernel&m=123128405217529&w=2

Hal