Re: [Gm2] linking : `__gxx_personality_v0' question

[Gaius Mulley]

Arnauld Michelizza <address@hidden> writes:

> Hi,
>
> I'd like to write a simple kernel for x86 on modula-2 (I already wrote
> one in C).
> I just had a try, but I currently have a linking problem :
>
>   $ gm2 -c -m32 Kernel.mod
>   $ ld -m elf_i386 --oformat binary -Ttext 1000 -e _M2_Kernel_init
> Kernel.o -o kernel
>   Kernel.o:(.eh_frame+0x11): undefined reference to `__gxx_personality_v0'
>
> While looking in Kernel.o :
>
>   $ nm Kernel.o
>   0000000000000000 b MyScreen
>   0000000000000002 t PutCharOnXY
>   0000000000000000 T _M2_Kernel_finish
>   0000000000000030 T _M2_Kernel_init
>                                U __gxx_personality_v0
>
> It seems that __gxx_personality_v0 is related with c++ but I can't
> figure what it does and if it's really necessary to use that function.
> Anyway, I'm not totaly sure I used 'ld' the right way.
>
> Any help ?
>
> Arnauld

Hi Arnauld,

you could try:

gm2 -c -m32 -fno-exceptions Kernel.mod

and then the link.  C++ (libstdc++) is used to handle Modula-2
exceptions (which you probably don't want in your kernel).  Some
embedded ports cannot use libstdc++ either so this option disables this
library.

regards,
Gaius