Hi All!
This applies to the Raspberry Pi 2 B.
After a bit of cut and try, I got Anthony Walter's version of Lazarus to
run as root (from the Raspbian menu) so I could debug programs which do
DigitalRead, DigitalWrite, etc. using h2wiringPi.
Note that this could be dangerous if you are permanently connected to
the web while using Lazarus, but in my case, the only time that my Pi
will be connected to the web is when I am getting Lazarus set up (and it
is not yet running as root). Thereafter I will be connected directly
from Pi to Laptop on a private subnet with no router. Once the app is
developed the Pi will not be networked at all.
Incidentally, I got the Pi setup so that if it fails DHCP (is not
connected to a router) it reverts to the private subnet. If anyone
wants to do this, let me know and I'll publish the "magic incantations".
;-) It is much more convenient than editing /etc/network/interfaces
every time you need to change from accessing the web to a local private
subnet.
The application itself must run as root to do digital I/O. If you don't
want to debug using the IDE, you don't have to make the IDE run as root,
though, just the app.
Using Anthony's default paths, I created a file in
/home/<mydir>/Development/FreePascal/lazarus called lazroot.sh This
file contains two lines:
xhost +localhost
sudo /home/<mydir>/Development/FreePascal/lazarus/lazarus.sh
Then chmod +x lazroot.sh
I used the Menu > Preferences > Main Menu Editor to change the command
which starts Lazarus to:
/home/<mydir>/Development/FreePascal/lazarus/lazroot.sh
Obviously <mydir> is the directory where lazarus is located.
At first I tried to change the Menu command to the two lines in the
lazroot.sh file, but the internals of the menu system did not support
multi-command arguments.
For some reason, Lazarus re-built itself (as if I were installing
components) the very first time I ran it as root. After that it starts
normally.
Hope this helps someone in return for all the help I have been given here.
Don Ziesig
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