build error on fedora 34

[langfingaz]

Hi,
thanks for this project. I'm already using it as flatpak for quite some time.
However, when trying to build it today, it failed. Here the steps done and the error. I hope this may help you.

Note: I created a build directory inside pdfsilcer and not next to it (as opposed tho the instructions in the README), but this shouldn't be the cause of error I guess ...

# deps
sudo dnf install gtkmm30-devel poppler-cpp-devel cairomm-devel qpdf-devel libuuid-devel intltool gettext

# checkout the code
mkdir -p ~/Downloads/git
cd ~/Downloads/git
git clone --recursive https://github.com/junrrein/pdfslicer.git

# build
cd pdfslicer
mkdir build-pdfslicer
cd build-pdfslicer
cmake ../ -DCMAKE_BUILD_TYPE=Release
make

[ 56%] Building CXX object src/CMakeFiles/pdfslicer.dir/application/previewwindow.cpp.o
In file included from /home/yoda/Downloads/git/pdfslicer/src/application/pagewidget.hpp:20,
                 from /home/yoda/Downloads/git/pdfslicer/src/application/previewwindow.hpp:21,
                 from /home/yoda/Downloads/git/pdfslicer/src/application/previewwindow.cpp:17:
/home/yoda/Downloads/git/pdfslicer/src/application/task.hpp: In instantiation of ‘Slicer::RenderTask<T>::RenderTask(std::weak_ptr<_Tp>, int) [with T = Slicer::PageWidget]’:
/usr/include/c++/11/ext/new_allocator.h:162:4:   required from ‘void __gnu_cxx::new_allocator<_Tp>::construct(_Up*, _Args&& ...) [with _Up = Slicer::RenderTask<Slicer::PageWidget>; _Args = {std::shared_ptr<Slicer::PageWidget>&, int}; _Tp = Slicer::RenderTask<Slicer::PageWidget>]’
/usr/include/c++/11/bits/alloc_traits.h:512:17:   required from ‘static void std::allocator_traits<std::allocator<_Tp1> >::construct(std::allocator_traits<std::allocator<_Tp1> >::allocator_type&, _Up*, _Args&& ...) [with _Up = Slicer::RenderTask<Slicer::PageWidget>; _Args = {std::shared_ptr<Slicer::PageWidget>&, int}; _Tp = Slicer::RenderTask<Slicer::PageWidget>; std::allocator_traits<std::allocator<_Tp1> >::allocator_type = std::allocator<Slicer::RenderTask<Slicer::PageWidget> >]’
/usr/include/c++/11/bits/shared_ptr_base.h:519:39:   required from ‘std::_Sp_counted_ptr_inplace<_Tp, _Alloc, _Lp>::_Sp_counted_ptr_inplace(_Alloc, _Args&& ...) [with _Args = {std::shared_ptr<Slicer::PageWidget>&, int}; _Tp = Slicer::RenderTask<Slicer::PageWidget>; _Alloc = std::allocator<Slicer::RenderTask<Slicer::PageWidget> >; __gnu_cxx::_Lock_policy _Lp = __gnu_cxx::_S_atomic]’
/usr/include/c++/11/bits/shared_ptr_base.h:650:16:   required from ‘std::__shared_count<_Lp>::__shared_count(_Tp*&, std::_Sp_alloc_shared_tag<_Alloc>, _Args&& ...) [with _Tp = Slicer::RenderTask<Slicer::PageWidget>; _Alloc = std::allocator<Slicer::RenderTask<Slicer::PageWidget> >; _Args = {std::shared_ptr<Slicer::PageWidget>&, int}; __gnu_cxx::_Lock_policy _Lp = __gnu_cxx::_S_atomic]’
/usr/include/c++/11/bits/shared_ptr_base.h:1342:14:   required from ‘std::__shared_ptr<_Tp, _Lp>::__shared_ptr(std::_Sp_alloc_shared_tag<_Tp>, _Args&& ...) [with _Alloc = std::allocator<Slicer::RenderTask<Slicer::PageWidget> >; _Args = {std::shared_ptr<Slicer::PageWidget>&, int}; _Tp = Slicer::RenderTask<Slicer::PageWidget>; __gnu_cxx::_Lock_policy _Lp = __gnu_cxx::_S_atomic]’
/usr/include/c++/11/bits/shared_ptr.h:409:59:   required from ‘std::shared_ptr<_Tp>::shared_ptr(std::_Sp_alloc_shared_tag<_Tp>, _Args&& ...) [with _Alloc = std::allocator<Slicer::RenderTask<Slicer::PageWidget> >; _Args = {std::shared_ptr<Slicer::PageWidget>&, int}; _Tp = Slicer::RenderTask<Slicer::PageWidget>]’
/usr/include/c++/11/bits/shared_ptr.h:862:14:   required from ‘std::shared_ptr<_Tp> std::allocate_shared(const _Alloc&, _Args&& ...) [with _Tp = Slicer::RenderTask<Slicer::PageWidget>; _Alloc = std::allocator<Slicer::RenderTask<Slicer::PageWidget> >; _Args = {std::shared_ptr<Slicer::PageWidget>&, int}]’
/usr/include/c++/11/bits/shared_ptr.h:878:39:   required from ‘std::shared_ptr<_Tp> std::make_shared(_Args&& ...) [with _Tp = Slicer::RenderTask<Slicer::PageWidget>; _Args = {std::shared_ptr<Slicer::PageWidget>&, int}]’
/home/yoda/Downloads/git/pdfslicer/src/application/previewwindow.cpp:121:57:   required from here
/home/yoda/Downloads/git/pdfslicer/src/application/task.hpp:51:34: error: no matching function for call to ‘Slicer::Task::Task()’
   51 |         , m_targetSize{targetSize}
      |                                  ^
/home/yoda/Downloads/git/pdfslicer/src/application/task.hpp:30:5: note: candidate: ‘Slicer::Task::Task(Slicer::Task&&)’ (deleted)
   30 |     Task(Task&&) = delete;
      |     ^~~~
/home/yoda/Downloads/git/pdfslicer/src/application/task.hpp:30:5: note:   candidate expects 1 argument, 0 provided
/home/yoda/Downloads/git/pdfslicer/src/application/task.hpp:28:5: note: candidate: ‘Slicer::Task::Task(const Slicer::Task&)’ (deleted)
   28 |     Task(const Task&) = delete;
      |     ^~~~
/home/yoda/Downloads/git/pdfslicer/src/application/task.hpp:28:5: note:   candidate expects 1 argument, 0 provided
make[2]: *** [src/CMakeFiles/pdfslicer.dir/build.make:290: src/CMakeFiles/pdfslicer.dir/application/previewwindow.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:435: src/CMakeFiles/pdfslicer.dir/all] Error 2
make: *** [Makefile:136: all] Error 2