Re: mbarcode
 

You should see some output regarding the plugin (whether it was detected, if it was loaded and if not what the error was) if you run mbarcode from a terminal.

Re: mbarcode
 

It was noticed, but couldn't be loaded.
Loading ///
Could not load ///
Any help is deeply appreciated.

Re: mbarcode
 

I don't know what specifically is the problem, but I strongly suspect that it's something with using g++ directly instead of running stuff through qmake.

Re: mbarcode
 

Surely.
I have added
#ifndef QT_STATICPLUGIN
#define QT_STATICPLUGIN
#endif
to the header, but nothing changed. Still could not load.
Of course, qmake knows some magic options for g++ command. The question is, what commands?

Right now, I removed ^M from mb.cpp and use these two commands to create mb.so.

g++ -Wall -fPIC -c mb.cpp
g++ -Wall -fPIC -shared mb.o -o mb.so

But nothing changed:
Could not load ///.
What else can be suggested?

"...The compilation of loadable modules are very much system-dependent..."
http://www.inf.usi.ch/carzaniga/sdl/doc/index.html
Can anybody help with it?

I hope I don't need to add -I///directory flags to g++, because if they were required, compilation wouldn't occur (header files wouldn't be found). So, what do optimisation -O3, -pipe, -fno-omit-frame-pointer and -fno-optimize-sibling-calls flags mean? Could they fix the problem?

Re: mbarcode
 

Can you not use QMake?

I'm also rather concerned that you're not linking against the QtPlugin library (though you apparently have no errors, which is also a bit strange).

Can you post some code so we can take a look ourselves?

Re: mbarcode
 

Well... I prefer not to use QMake and Make. They generate too much of difficult-to-understand text inside qmake.pro and Makefile, and working without QMake would let me understand C++ and g++, while working with QMake leads me to Qt, do-this, don't-know-why-it-is-needed.

I have heard (in Google) that QtPlugin is linked through QtGui. It's not the straightest way, but GUI is needed, anyway, I suppose.

Here it is, renamed to mb.cpp.txt.
Quite short, not more that 80 lines of code altogether.

Re: mbarcode
 

Thanks, will take a look when I get back from work unless someone beats me to it.

Re: mbarcode
 

Right, I Debian-ised it and did a compile, I've attached the whole tarball here. It also contains output.txt which should show you the commands that were executed to get it to build.

Have a look and see if that's of use.

Re: mbarcode
 

Hmm... It's strange, but the .so which was built and packed into this .tar.gz, still gives this message "Could not load" when I run mbarcode from terminal. Even though I have given full r+w+x permissions to the .so.

It seems that this stubborn cpp is ready to ruin even qmake magic in order to prove that its impossible to build a module from it...

I'll continue to look at the qr-code plugin: maybe, there is a hint because the qr-code plugin works fine.

Re: mbarcode
 

Hmm, using mbarcode again today I noticed the fps was much lower. It seems that when opening mbarcode with the lenscover closed the fps is really high (it was above 100 at one time) but when opening the cover it drops and stais down. The fps bug dosn't seem to happen if mbarcode is started with the lenscover open.