Re: [GHC] #12111: prof build flavour doesn't work

25 May 2016

      #12111: prof build flavour doesn't work
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        Reporter:  osa1              |                Owner:
            Type:  bug               |               Status:  infoneeded
        Priority:  normal            |            Milestone:
       Component:  Build System      |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by thomie):

 This commit message is informative
 (ce1f1607ed7f8fedd2f63c8610cafefd59baaf32):
 {{{
 Author: Simon Marlow 
 Date:   Sat Nov 7 09:39:05 2015 +0000

     Make GHCi & TH work when the compiler is built with -prof

     Summary:
     Amazingly, there were zero changes to the byte code generator and very
     few changes to the interpreter - mainly because we've used good
     abstractions that hide the differences between profiling and
     non-profiling.  So that bit was pleasantly straightforward, but there
     were a pile of other wibbles to get the whole test suite through.

     Note that a compiler built with -prof is now like one built with
     -dynamic, in that to use TH you have to build the code the same way.
     For dynamic, we automatically enable -dynamic-too when TH is required,
     but we don't have anything equivalent for profiling, so you have to
     explicitly use -prof when building code that uses TH with a profiled
     compiler.  For this reason Cabal won't work with TH.  We don't expect
     to ship a profiled compiler, so I think that's OK.

     Test Plan: validate with GhcProfiled=YES in validate.mk

     Reviewers: goldfire, bgamari, rwbarton, austin, hvr, erikd, ezyang

     Reviewed By: ezyang

     Subscribers: thomie

     Differential Revision: https://phabricator.haskell.org/D1407

     GHC Trac Issues: #4837, #545
 }}}

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Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12111#comment:2
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