Re: strange problem

[Antonio Coralles <noche suapie reflex at>]

> On Sat, 2005-01-22 at 14:45, Antonio Coralles wrote:
> > After switching to the GNU autotools a strange problem occured in my
> > program [this has at least something to do with GTKMM]:
> > In my program there are, as usual, two different ways to load a file.
> > You can pass a filename throgh argv or you can select a filename throgh
> > a Gtk::FileChooserDialog while the app is running. Now the strange thing
> > is, that when I load a file "throgh argv", so that the actual loading
> > happens before Gtk::Main::run(...) it perfectly works. But when I try to
> > load a file after the program has started I experience somekind of
> > undefined behavour. Sometimes the prog freezes and sometimes I get
> > strange segfaults - but not in the components of the interface, but deep
> > down in the routines which are responsible for loading. I eaven have a
> > test for loading/saving - and that test works fine. Besides I didn't get
> > this error before switching to automake. So my assumtion is that the
> > fault occurs at linking time - but I have no clue what it can be. I also
> > tried switching from -lboost_date_time to lboost_date_time_mt
> > [threadsave version] becuase it seems to me that Gtk is a multi threaded
> > library - but that doesn't really help. Maybe somebody here had similar
> > problems and knows what to do ...

Finally I solved this wired problem. I recognzed that the behavour of my 
buggy exectuable is seriously affected by the order in which the various 
*.a files are linked into my main executable. It also seems to me that 
moving the GTKMM linker flags before all other libraries had a positive 
effect. However, I started to experiment with the linking order - with 
the help of my handcrafted makefile - and soon this effort resulted in a 
working executable. Maybe this has something to do with static variables 
- which are this way initialized in the right order - but this is just a 
guess; Maybe someone can give me a more founded explanation why this did 
the magic ....
antonio