arm-nto-qnx support

[Nick Clifton]

Hi Graeme,

> I am working on adding support for QNX6 for arm.  One of the
> few differences between our stuff and the default is that
> QNX6's ELF_MAXPAGESIZE is 0x1000, and the default is 0x8000.
> 
> In our own cvs tree, I have set targ_cflags=-D__QNXTARGET__ in
> bfd/config.bfd, and then in bfd/elf32-arm.c:
> 
>  #ifdef __QNXTARGET__
>  #define ELF_MAXPAGESIZE         0x1000
>  #else
>  #define ELF_MAXPAGESIZE         0x8000
>  #endif
> 
> To do this right, should I set up a QNX6 bfd backend for arm
> and just define ELF_MAXPAGESIZE as 0x1000 there?

Yes.

> Or is there a lighter weight way of getting it done?

Not really.  There is no real need to duplicate all of the contents of
elf32-arm.h in a seperate file for qnx however.  It should be possible
to create a small wrapper file, like elfarm-nabi.c, and define
ELF_MAXPAGESIZE there.  (You will also need to edit elf32-arm.h and
have only set ELF_MAXPAGESIZE if it is not already defined).

Cheers
        Nick