[maemo-developers] [maemo-developers] Problems with remote debugging using scratchbox - osso_initialize fails

[From: Jon Adams]

Can anyone suggest a HowTo or provide a simple
explanation on running a Maemo application that calls
osso_initialize from within the scratchbox environment
using the latter's cpu transparency feature? What I
mean is running the application on the Nokia 770
device using USB networking and sbrsh -- not on the PC
host. 

I'm trying to produce a workflow for debugging a
program remotely using the developer rootfs and a
scratchbox environment that uses cpu transparency.
Thus, I have a scratchbox set for ARMEL and cpu
transparency and I can compile my programs without
problems but when I run the program executable from
the scratchbox command line the call to
osso_initialize always fails. However, if I install
the program package on the Nokia it functions
correctly and I can also run the executable directly
from an ssh session to the Nokia. I've also tried the
run-standalone script but that seems to make no
improvement/change.

I suspect that the problem may be the requirement for
the .desktop and .service files that are referenced by
osso_initialize/Task Navigator/D-BUS, but how do you
set those for remote debugging? Is it even possible?
Do I have to remove the calls to osso_* in order to
perform remote debugging? I suppose there may also be
issues with dynamically linked libraries but that
would mean that the cpu transparency feature isn't
that transparent (or I misunderstand its capabilities,
which is certainly a possibility).

I __can__ get remote execution and debuggin working on
a simple "Hello World" standard i/o program but are
there any special tricks to debug remotely with a
Hildon-GUI application? A remote debug workflow
example using the sample Maemopad application would be
quite useful.

Here is my basic setup:

Developer rootfs installed on the Nokia with root
access enabled (should be the rootfs based upon the
first release of OS2006).

Host PC running Debian etch with kernel 2.6.17

Scratchbox 0.9.8.8 and cs2005q3.2-glibc toolchains
with ARMEL target and cpu transparency enabled with
sbrsh. 

The following command when executed from the
scratchbox always fails at osso_initialize:

[sbox-ARMEL:~/maemopad/maemopad-1.5/src] >
run-standalone.sh  ./maemopad

This happens whether or not the full maemopad package
is installed on the Nokia (i.e. with the package
installed the maemopad related .service and .desktop
files exist on the Nokia file system). Also, as I
mentioned before I can execute a copy of the maemopad
executable from an ssh session and the same binary
works fine when it is called directly from the Nokia
file system. Thus, only when maemopad is launched from
the scratchbox does the osso_initialize call fail.