Re: Illegal instruction....

[David J Taylor]

From: Martin Burnicki

This doesn't sound like the version of the include file is the problem,
and "illegal instruction" is not related to the API version but to the
machine code compiled from that source code.

If my assumption is correct you should also get the "illegal
instruction" if you remove the line

#include <gps.h>

and add one of the following instead:

#define GPSD_API_MAJOR_VERSION   6
#define GPSD_API_MAJOR_VERSION   8

> I thought
> compiling in the /home/pi/gpsd directory might do that, but I recall
> there being something about different include file locations - system
> and local?  I wonder how the build of gpsd got it right!  Changing
> <gps.h> to "gps.h" while compiling in the gpsd directory still produced
> the illegal instruction.

how do you compile the program? Using a single command line, or is there
a Makefile?

Martin
=============================

Martin,

I made the changes you suggested, and I had to remove the gpsdata struct 
definition as well, of course.  The program is compiled with just a gcc 
command:

pi@raspi-3:~ $ gcc gpsdVersionCheck.c -o gpsdCheckVersion -lgps
pi@raspi-3:~ $ ./gpsdCheckVersion
Illegal instruction

pi@raspi-3:~ $ gcc gpsdVersionCheck.c -o gpsdCheckVersion
pi@raspi-3:~ $ ./gpsdCheckVersion
GPSD API < 7
pi@raspi-3:~ $

So it's something to do the the gps linked library.  I wonder which one of 
these it might be:

pi@raspi-3:~ $ sudo find / -name gps
/usr/lib/python3/dist-packages/gps
/usr/local/lib/python2.7/dist-packages/gps
/home/pi/gpsd/contrib/gps
/home/pi/gpsd/tests/gps
/home/pi/gpsd/gps
/home/pi/gpsd/devtools/gps

I feel like I'm getting somewhere now!

Cheers,
David
--
SatSignal Software - Quality software for you
Web: https://www.satsignal.eu
Email: address@hidden
Twitter: @gm8arv