[GHC] #13739: very slow linking of executables with ld.bfd < 2.27 (was: Very slow linking of profiled executables)

[GHC]

#13739: very slow linking of executables with ld.bfd < 2.27
-------------------------------------+-------------------------------------
        Reporter:  duog              |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.2.1-rc2
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by duog):

 This problem rears its head in an ugly fasion while configuring packages
 that have custom setups:
 {{{
 cabal unpack distributive-0.5.2
 cd distributive-0.5.2
 cabal sandbox init
 cabal install --only-dependencies
 time cabal configure
 }}}
 gives:
 {{{
 [1 of 1] Compiling Main             ( dist/setup/setup.hs,
 dist/setup/Main.o )
 Linking ./dist/setup/setup ...
 Configuring distributive-0.5.2...

 real    0m21.580s
 user    0m20.928s
 sys     0m0.560s

 }}}

 while
 {{{
 time cabal configure --ghc-options=-dynamic
 }}}
 gives:
 {{{
 Resolving dependencies...
 [1 of 1] Compiling Main             ( dist/setup/setup.hs,
 dist/setup/Main.o )
 Linking ./dist/setup/setup ...
 Configuring distributive-0.5.2...

 real    0m1.830s
 user    0m1.460s
 sys     0m0.228s
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13739#comment:23>
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