[MacPorts] #46441: bob: build failure, possible boost issue

[MacPorts]

#46441: bob: build failure, possible boost issue
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  Reporter:  devans@…                   |      Owner:  andre.anjos@…
      Type:  defect                     |     Status:  new
  Priority:  Normal                     |  Milestone:
 Component:  ports                      |    Version:
Resolution:                             |   Keywords:
      Port:  qt4-mac qt4-x11 boost bob  |
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Changes (by devans@…):

 * cc: michaelld@…, sean@… (added)
 * port:  qt4-mac qt4-x11 => qt4-mac qt4-x11 boost bob


Comment:

 Replying to [comment:2 and.damore@…]:
 > See [https://bugreports.qt.io/browse/QTBUG-22829 this Qt bug] for info
 and possible workarounds:
 > *  wrap the boost header (uglier solution)
 > *  wrap inclusion of specific boost header in the library's client
 > *  switch to Qt5 since the new moc properly expands macros.

 Thanks for narrowing this down.

 I've been trying to understand the inciting event that broke bob, since
 `bob @1.2.2_6` built correctly but `bob @1.2.2_7` does not.  The only
 difference is a (unrelated) rev bump to bob due to an ABI change in hdf5.

 I've confirmed that `bob @1.2.2_7` will build without error if boost is
 reverted locally to `boost @1.56.0_2+no_single+no_static+python27`
 (r127942).

 This, in conjunction with the Qt bug report, supports the hypothesis that
 the problem is triggered by a specific combination of Qt version, boost
 version and boost includes used in bob.

 In this case, combination is qt4-mac @4.8.6, boost @1.57.0 and bob @1.2.2.

 The most recent comment in the Qt bug supports this hypothesis
 {{{
 Only for info: See also with Qt 4.8.6 + boost 1.57.0 + include
 <boost/signals2.hpp>
 }}}

 The best solution would be to fix moc in Qt 4.8.6 but the upstream bug has
 been closed so a work around in bob
 may be called for.

 Copying possibly interested parties.

-- 
Ticket URL: <https://trac.macports.org/ticket/46441#comment:5>
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