Re: order of constructors

[Erik Christiansen <erik at dd dot nec dot com dot au>]

On Mon, Dec 01, 2003 at 09:10:26PM -0500, Peter Barada wrote:
> 
> Is there any way to control the order of static constructors so that
> some that access other functions are done after those functions
> intializing fucntions are done?
> 
> I guess I'm really asking is there any way to collect together a group
> of static constructors and then have them 'constructed' *after* some
> initialization functions for objects/libraries that they refer to have
> been called? 

Peter,

   Don't know if you can tweak what I do, to work in your case, but here
is a nuts & bolts approach, FWIW:

   o  Use a linker command script with a nifty sequence of
      initialisation sections. e.g. .init0, .init1, ... init9.
      (The avr-gcc|binutils distro comes with 'em, so you may not even
      have to tweak yours, either.)

   o  Use e.g. __attribute__ ((section(".init5"))) to place in-line
      constructor code between what's done at 4 and 6.

   o  It'll all run before main. (The .finiX sections have the
      destructor code.)

   Caveat: I'm doing it in assembler, using e.g.:

      .section .init6,"ax",@progbits

   so the chance that there's something in your circumstances that I
haven't thought of is a bit like the elephant hiding in a strawberry
patch by painting its toenails red. ;-)

Erik

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