[GHC] #8790: rts: unrust 'libbfd' debug symbols parser

[GHC]

#8790: rts: unrust 'libbfd' debug symbols parser
----------------------------+----------------------------------------------
        Reporter:  slyfox   |            Owner:
            Type:  bug      |           Status:  new
        Priority:  normal   |        Milestone:
       Component:           |          Version:  7.6.3
  Compiler                  |         Keywords:
      Resolution:           |     Architecture:  Unknown/Multiple
Operating System:           |       Difficulty:  Moderate (less than a day)
  Unknown/Multiple          |       Blocked By:
 Type of failure:           |  Related Tickets:
  None/Unknown              |
       Test Case:           |
        Blocking:           |
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Comment (by slyfox):

 I think to make it work properly we need to use real code used by ghc with
 AC_TRY_LINK.
 Something like that:

 {{{
     AC_TRY_LINK([#include <libbfd.h>
                 #include "mk/config.h"],
                 [
                 /* some ghc code using bfd_check_format_matches,
 bfd_get_symtab_upper_bound, etc */
                 ])
 }}}

 That way the ./configure linker will try to use the same bfd parts as real
 code.

 I'd also like to:
 - add a manual knob to enable/disable 'bfd' depend
 - fix memory leak introduced by symbol loading (by unloading them)

 Does all this sound sane?

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8790#comment:3>
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