[GHC] #10223: Cleanup `mk/build.mk.sample`

[GHC]

#10223: Cleanup `mk/build.mk.sample`
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        Reporter:  thomie            |                   Owner:  thomie
            Type:  task              |                  Status:  new
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Description changed by thomie:

Old description:



New description:

 The goal is to make build.mk.sample easier to understand for GHC
 developers.

 There are currently 13 BuildFlavours available to us. It should be clear
 what the differences between them are, and if those differences are put
 there on purpose or it they are bugs. There is a certain amount of cargo
 culting going on in build.mk.sample, with settings just left alone for
 years because nobody dares touching them (-H64m -fasm) (or nobody cares).

 Quiz question: what is the difference between the quick and the devel2
 build is.

 We should try to keep the changes backward-compatible, because there are
 blog posts etc out there that refer to the existing BuildFlavours.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10223#comment:7>
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