[GHC] #7810: make show VALUE=VAR depends on ghc-stage1

[GHC]

#7810: make show VALUE=VAR depends on ghc-stage1
-------------------------------------+-------------------------------------
        Reporter:  kgardas           |                   Owner:  thomie
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Build System      |                 Version:  7.7
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:  Phab:D1064
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Comment (by Thomas Miedema <thomasmiedema@…>):

 In [changeset:"ec197d390e18a6cfaa420009f5c5f143237f5a9f/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="ec197d390e18a6cfaa420009f5c5f143237f5a9f"
 Build system: add `make show!` command (#7810)

 A normal `make show` starts a build of the ghc-stage1 compiler, to
 create package-data.mk files. This version doesn't read those, so it
 will work right after ./configure.

 Differential Revision: https://phabricator.haskell.org/D1064
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7810#comment:8>
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