Re: [avr-gcc-list] [Fwd: building gcc/g++]

[Peter Jansen]

Hi,

> I did a little mistake with my patches. Now I can build avr-g++ without having
> to deal with newlib and libstdc++. They are simply not build.
> The patches are for gcc-3.0.2. Attached you will find them. I think they can
> be sent to the gcc team, but I haven't done it until now, because of the
> following problem.
>
> After writing a small c++ test program, simulating it in simulavr and analysing
> the generated asm file, I discovered that nobody is calling the
> con/destructors of global variables.
>
> I have found the __CTOR_LIST__ in the asm output.
>
> Is anybody working on a solution of this problem?


Yes we have just come across this problem, today we have fixed g++ to 
make this all work om the mega128 (which is what we are using).

It required the following fixes,

1. Put the con/destructor table in .ctors/.dtors sections, and make the 
linker script handle them.

2. Write a do_global_constructors function.

3. Call the do_global_constructors from the startup code.

I'm quite busy at the moment, but I will try and make patches for this, 
I still have to do something for the other avr's (unless you would like to)

> > I have posted patches for the ATmega128 for the above sources if you 
> > want ATmega128 support. Some of this support is already built into the 
> > CVS trees for gcc, binutils already for those who like like on the edge.

> Maybe you can send me the patches. Then I will integrae them into my build

> script.

here are the two messages to avr-gcc-list with the 3.0.2 patches for the 
mega128 support, these wont patch againsed the current CVS tree I don't 
think.

http://avr.jpk.co.nz/pipermail/avr-gcc-list/2001-November/001048.html
http://avr.jpk.co.nz/pipermail/avr-gcc-list/2001-November/001049.html

When I finish the constructor/destructor stuff, Ill get the latest CVS 
source update the patches and send them to the gcc/binutils maintainers.

The stuff for avr-libc is already in the latest avr-libc for the 
ATmega128 at

http://www.amelek.gda.pl/avr/libc/

Regards,

--
Peter Jansen
Smart Container
Level 1, NIC Building
Eveleigh
NSW       1430
AUSTRALIA


avr-gcc-list at http://avr1.org