[GHC] #11472: Remove CallStack CPP guards in GHC 8.2

[GHC]

#11472: Remove CallStack CPP guards in GHC 8.2
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        Reporter:  bgamari           |                Owner:
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  7.10.3
      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 Ben Gamari <ben@…>):

 In [changeset:"ede055eb230ac33da276f1416678f99e32e83da2/ghc"
 ede055eb/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="ede055eb230ac33da276f1416678f99e32e83da2"
 TyCoRep: Restore compatibility with 7.10.1

 Sadly CallStack wasn't present in 7.10.1, breaking the build when
 bootstrapping from this version.

 This patch essentially disables CallStack support for stage1 builds with
 7.10.*. This doesn't seem so unreasonable though as stage2 will still
 work.

 Test Plan: Validate with 7.10.1

 Reviewers: gridaphobe, jstolarek, austin

 Reviewed By: jstolarek

 Subscribers: thomie, jstolarek

 Differential Revision: https://phabricator.haskell.org/D1812

 GHC Trac Issues: #11472
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11472#comment:2>
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