hugin-2014.0.0 fails to build with boost >=1.57.0

[Timo Gurr]

Applied the patch http://sourceforge.net/p/hugin/hugin/ci/e237d6d1d87354f974d37a95ba52dbd9666dd310/ for boost-1.56.0 but running into another build error with boost >=1.57.0.

[ 58%] Building CXX object src/hugin1/hugin/CMakeFiles/hugin.dir/GLViewer.cpp.o
In file included from /home/user/Downloads/hugin-2014.0.0/src/hugin1/hugin/TextureManager.h:45:0,
                 from /home/user/Downloads/hugin-2014.0.0/src/hugin1/hugin/ViewState.h:72,
                 from /home/user/Downloads/hugin-2014.0.0/src/hugin1/hugin/GLViewer.h:26,
                 from /home/user/Downloads/hugin-2014.0.0/src/hugin1/hugin/GLViewer.cpp:40:
/usr/include/boost/signals2/trackable.hpp: In member function 'boost::weak_ptr<boost::signals2::detail::trackable_pointee> boost::signals2::trackable::get_weak_ptr() const':
/usr/include/boost/signals2/trackable.hpp:49:7: error: return type 'class boost::weak_ptr<boost::signals2::detail::trackable_pointee>' is incomplete
       {
       ^
In file included from /usr/include/boost/signals2/slot.hpp:22:0,
                 from /usr/include/boost/signals2/connection.hpp:23,
                 from /usr/include/boost/signals2/signal.hpp:21,
                 from /usr/include/boost/signals2.hpp:19,
                 from /home/user/Downloads/hugin-2014.0.0/src/hugin_base/huginapp/ImageCache.h:32,
                 from /home/user/Downloads/hugin-2014.0.0/src/hugin1/hugin/TextureManager.h:51,
                 from /home/user/Downloads/hugin-2014.0.0/src/hugin1/hugin/ViewState.h:72,
                 from /home/user/Downloads/hugin-2014.0.0/src/hugin1/hugin/GLViewer.h:26,
                 from /home/user/Downloads/hugin-2014.0.0/src/hugin1/hugin/GLViewer.cpp:40:
/usr/include/boost/signals2/detail/tracked_objects_visitor.hpp: In member function 'void boost::signals2::detail::tracked_objects_visitor::add_if_trackable(const boost::signals2::trackable*) const':
/usr/include/boost/signals2/detail/tracked_objects_visitor.hpp:85:72: error: invalid use of void expression
             slot_->_tracked_objects.push_back(trackable->get_weak_ptr());
                                                                        ^
src/hugin1/hugin/CMakeFiles/hugin.dir/build.make:399: recipe for target 'src/hugin1/hugin/CMakeFiles/hugin.dir/GLViewer.cpp.o' failed
make[2]: *** [src/hugin1/hugin/CMakeFiles/hugin.dir/GLViewer.cpp.o] Error 1
CMakeFiles/Makefile2:1784: recipe for target 'src/hugin1/hugin/CMakeFiles/hugin.dir/all' failed
make[1]: *** [src/hugin1/hugin/CMakeFiles/hugin.dir/all] Error 2
Makefile:137: recipe for target 'all' failed
make: *** [all] Error 2

Complete build log attached.

[tmodes (tmodes)]

This seems to be a problem in boost 1.57.
Please report the problem to boost tracker.

[Timo Gurr (timo-gurr)]

Indeed, thanks. And it also has been fixed in git master, for reference:

Upstream bug: https://svn.boost.org/trac/boost/ticket/10100
Upstream accepted pull request: https://github.com/boostorg/signals2/pull/8/commits

[tmodes (tmodes)]

Thanks for feedback.
Committed a workaround for Hugin for Boost 1.57