[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):

 After a coffee I understand that I can make things much cleaner and
 simpler.

 No need to touch qt ports at all :)

 So, I've opened a PR: https://github.com/macports/macports-
 ports/pull/20338 which adds one more hack for LevelDB to expose private
 API `helpers/memenv/memenv.h` and creates fake library `libmemenv.dylib`
 by default.

 It allows to achieve an output of `port -v configure qt5-qtwebkit`:
 {{{
 Checking for fontconfig... yes
 Checking for gccdepends... yes
 Checking for glx... no
 Checking for gnuld... no
 Checking for icu... yes
 Checking for leveldb... yes
 Checking for libsqlite3... yes
 Checking for libwebp... yes
 Checking for libXcomposite... no
 Checking for libxml2... yes
 Checking for libXrender... no
 Checking for libxslt... yes
 Checking for libzlib... yes
 }}}

 The only issue which should be left is conflict with `gperftools`. It can
 be avoided and LevelDB can be switched to `tmalloc` unconditionally via
 such dependencies but it had been unstable and crashes at `qgis3` port.
 Anyway, crash may appears by mixing different version of `tmalloc` because
 old version links everything statically.

 So, here I see two ways:
 1. Build leveldb with `+tmalloc` and confirms that `qgis3` doesn't crash;
 2. Try to make dependency from `gperftools` optional.

 I have no idea how to test (1), perhabs you may help with this. But I will
 investigate possibility of (2).

-- 
Ticket URL: <https://trac.macports.org/ticket/68132#comment:3>
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