[rfc] Allow platform-specific override for solib_bfd_open (Re: [RFC] solib for darwin)

[Ulrich Weigand]

> 	* solist.h (struct target_so_ops): New member bfd_open.
> 	(solib_find): Add prototype.
> 	(solib_bfd_fopen): Add prototype.
> 	* solib.c (solib_find, solib_bfd_fopen): New functions, extracted
> 	from solib_bfd_open.
> 	(solib_bfd_open): Use ops->bfd_open override if present.  Call
> 	solib_find and solib_bfd_open otherwise.
> 
> 	* objfiles.h (OBJF_KEEPBFD): New define.
> 	* objfiles.c (free_objfile): Do not close BFD if OBJF_KEEPBFD
> 	objfile flag is set.
> 	* solib.c (symbol_add_stub): Do not allocate second BFD for
> 	shared library; use OBJF_KEEPBFD flag on solib objfile.

I've checked this in now.

Bye,
Ulrich

-- 
  Dr. Ulrich Weigand
  GNU Toolchain for Linux on System z and Cell BE
  Ulrich.Weigand@de.ibm.com