[GHC] #13604: ghci no longer loads dynamic .o files by default if they were built with -O

[GHC]

#13604: ghci no longer loads dynamic .o files by default if they were built with -O
-------------------------------------+-------------------------------------
        Reporter:  George            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  GHCi              |              Version:  8.2.1-rc1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D3514
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by bgamari):

 Frankly, I've been surprised by the converse of this bug: GHC doesn't
 recompile when I request different optimization options. I can see the
 argument for a "go fast" mode, which uses any existing build products to
 avoid recompilation if at all possible, but it's not clear to me that this
 should be the default behavior.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13604#comment:15>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler