On 02/05/2018 05:37 PM, Mauro Carvalho Chehab wrote:
> Em Mon, 5 Feb 2018 08:21:54 -0800
> Tim Harvey <tharvey@xxxxxxxxxxxxx> escreveu:
>
>> Hans,
>>
>> I'm failing compile (of master 4ee9911) with:
>>
>> CXX v4l2_compliance-media-info.o
>> media-info.cpp: In function ‘media_type media_detect_type(const char*)’:
>> media-info.cpp:79:39: error: no matching function for call to
>> ‘std::basic_ifstream<char>::basic_ifstream(std::__cxx11::string&)’
>> std::ifstream uevent_file(uevent_path);
>> ^
>
> Btw, while on it, a few days ago, I noticed several class warnings when
> building v4l-utils on Raspbian, saying that it was using some features
> that future versions of gcc would stop using at qv4l2. See enclosed.
>
> I didn't have time to look on them.
>
> Thanks,
> Mauro
>
> In file included from /usr/include/c++/6/map:60:0,
> from /usr/include/arm-linux-gnueabihf/qt5/QtCore/qmetatype.h:57,
> from /usr/include/arm-linux-gnueabihf/qt5/QtCore/qobject.h:54,
> from /usr/include/arm-linux-gnueabihf/qt5/QtWidgets/qwidget.h:44,
> from /usr/include/arm-linux-gnueabihf/qt5/QtWidgets/qmainwindow.h:43,
> from /usr/include/arm-linux-gnueabihf/qt5/QtWidgets/QMainWindow:1,
> from qv4l2.h:25,
> from ctrl-tab.cpp:20:
> /usr/include/c++/6/bits/stl_tree.h: In member function ‘std::pair<std::_Rb_tree_node_base*, std::_Rb_tree_node_base*> std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_get_insert_hint_unique_pos(std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::const_iterator, const key_type&) [with _Key = unsigned int; _Val = std::pair<const unsigned int, v4l2_query_ext_ctrl>; _KeyOfValue = std::_Select1st<std::pair<const unsigned int, v4l2_query_ext_ctrl> >; _Compare = std::less<unsigned int>; _Alloc = std::allocator<std::pair<const unsigned int, v4l2_query_ext_ctrl> >]’:
> /usr/include/c++/6/bits/stl_tree.h:1928:5: note: parameter passing for argument of type ‘std::_Rb_tree<unsigned int, std::pair<const unsigned int, v4l2_query_ext_ctrl>, std::_Select1st<std::pair<const unsigned int, v4l2_query_ext_ctrl> >, std::less<unsigned int>, std::allocator<std::pair<const unsigned int, v4l2_query_ext_ctrl> > >::const_iterator {aka std::_Rb_tree_const_iterator<std::pair<const unsigned int, v4l2_query_ext_ctrl> >}’ will change in GCC 7.1
> _Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I've seen it too, but I have no idea what to do with it. I'm not even sure that it is in my
code instead of in Qt headers or even c++ header.
It's not exactly an informative message.
Since I compile with g++ version 7.2 it appears that it is just fine since it doesn't complain.
Regards,
Hans
