[GHC] #15968: configure doesn't error out when --enable-dwarf-unwind is given but libdw cannot be found

[GHC]

#15968: configure doesn't error out when --enable-dwarf-unwind is given but libdw
cannot be found
-------------------------------------+-------------------------------------
        Reporter:  nh2               |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Build System      |              Version:  8.6.2
  (make)                             |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Other             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D5424
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by Ben Gamari <ben@…>):

 In [changeset:"126aa794743b807b7447545697b96dd165ec3e16/ghc" 126aa79/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="126aa794743b807b7447545697b96dd165ec3e16"
 Add missing comma in 'libdw' configure check

 Fix a bug from cb882fc993b4972f7f212b291229ef9e9ade0af9. Without the
 comma, all non-diverging codepaths set 'UseLibdw=NO'.

 Reviewers: bgamari, nh2

 Reviewed By: nh2

 Subscribers: rwbarton, erikd, carter

 GHC Trac Issues: #15968

 Differential Revision: https://phabricator.haskell.org/D5459
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15968#comment:5>
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