[Bug target/54791] AIX-only: Constructors are not called in main program.

["adivilceanu at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54791

--- Comment #10 from Adi <adivilceanu at yahoo dot com> 2012-11-05 14:34:25 UTC ---
I found the real problem ! 
Now it can be reproducible even with a small test case.

I can summarize it like this: If you have a global object/function defined in
"n" different object files, then the constructors in the "n-1" object files
might not be invoked at all. This will happen always for sure if the
object/function is the first thing defined in those object files.

Explination: Each object file when complied with g++ for AIX, will get a
_GLOBAL__I_65535_0__***name_of_first_object_defined_in_this_compilation
unit***.
Now if there are 2 object file that have defined in them an object/function
with the same name/signature then these 2 object files will get the same
_GLOBAL__* symbol. 
Now later when the collect2 is involved it will take just one _GLOBAL__* into
account. It will ignore the other n-1 symbols and so n-1 object remain with all
their object's constructors not called.

Given the above I have fixed my project not to have this situation(object with
same name in multiple compilation units) and every constructor in my project is
called now !

So it has nothing to do with inline as I first suspected. My inline sub-problem
just was a side-effect of the real problem.

Do you consider this being a bug? I think it is. Even if no fix is provided at
least for me now something that would have been very usefull is if collect2
would have issued a more explicit message like "Multiple definitions of global
objects with the same name; Some global objects will not be initialied !".

I mean in the collect2 it is known that if it encounters this situation that
there will be objects that will remain not-initialized. Right?

Now that I solve this problem I have one new problem: It is related to the
order of initialization of global objects across multiple compilation units.
Shout I continue on this thread or open a new one? I am not sure its a bug.. I
first have some questions on it.