[MacPorts] #68132: qgis3 broken by leveldb update

[MacPorts]

#68132: qgis3 broken by leveldb update
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  Reporter:  gwright83  |      Owner:  Veence
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  qgis3      |
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Comment (by catap):

 > Another issue caused by the leveldb update is that because leveldb
 conflicts with gperftools, and qgis3 depends on leveldb, there is a
 conflict between qgis3 and grpc (which requires gperftools).

 This is funny but the root cause of that variant and conflicts is qgis3 :)
 See: https://trac.macports.org/ticket/56164

 If it irrelevant anymore, I'd happy to removed that hack.

 > It looks as if qt5-qtwebkit is not detecting leveldb and is using a
 bundled version, which causes a conflict with the installed header file
 from the leveldb port. This problem was reported in #65832. The same issue
 occurs when I tried to build qt5-qtwebkit

 On my system it fails because:
 {{{
 > leveldb.cpp:22:10: fatal error: 'helpers/memenv/memenv.h' file not found
 > #include <helpers/memenv/memenv.h>
 >          ^~~~~~~~~~~~~~~~~~~~~~~~~
 > 1 error generated.
 > make: *** [obj/leveldb.o] Error 1
 }}}
 which means that qtwebkit uses some internal API of leveldb which exists
 in helpers. Quite wired.

 Anyway, I've prepared a kind of fix: https://github.com/catap/macports-
 ports/tree/leveldb

 It contains two commits / changes:
 1. a new variant at LevelDB which exposes `helpers/memenv/memenv.h`;
 2. a hack inside qtwebkit to stop using `libmemenv` which doesn't exist
 anymore.

 May I ask you to give it a try? Thanks,

-- 
Ticket URL: <https://trac.macports.org/ticket/68132#comment:2>
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