Wt

Note: When I comment out this constexpr part in the WModelIndex.C, the file compiles

I use ubuntu 14.4 , gcc version 4.8.4 .

I save same problem with you.

Wt requirements:

Compiler: Any compiler with sufficient support for C++11, like GCC 4.9 or higher, or Clang 3.3 or higher.

1. check gcc version : g -v

1. install g 4.9

Thanks for this answer, Chao-Kai Yang.

It was helpful. It wasn't so easy to change my compiler, because the standard is 4.8 and I won't change the standard for my distribution.

But I changed it for the creation and then it was working.

For the guys of redmine: It would be nice when you'd add a compiler setting into the configuration settings (ccmake)

Thanks

CMake allows you to change the C compiler by default. ccmake reveals those options if you press the t key (the CMAKE_CXX_COMPILER and CMAKE_C_COMPILER options).

Regards,

Roel

Getting the same errors with gcc 9.1.0

Would you post a new post with the output you're getting along with the distribution, etc.?

/p/tv/local/redhat/wt-4.0.5/src/Wt/Dbo/backend/MSSQLServer.C:21:19: fatal error: codecvt: No such file or directory
 #include <codecvt>
                   ^
compilation terminated.
[ 28%] Building CXX object src/CMakeFiles/wt.dir/Wt/WLocalizedStrings.C.o
[ 28%] Linking CXX shared library libwtdbomysql.so
[ 30%] Building CXX object src/Wt/Dbo/backend/CMakeFiles/wtdbosqlite3.dir/Sqlite3.C.o
make[2]: *** [src/Wt/Dbo/backend/CMakeFiles/wtdbomssqlserver.dir/MSSQLServer.C.o] Error 1
make[1]: *** [src/Wt/Dbo/backend/CMakeFiles/wtdbomssqlserver.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
[ 30%] Building CXX object src/CMakeFiles/wt.dir/Wt/WLogger.C.o
[ 30%] Building C object src/Wt/Dbo/backend/CMakeFiles/wtdbosqlite3.dir/amalgamation/sqlite3.c.o
[ 30%] Building CXX object src/CMakeFiles/wt.dir/Wt/WMatrix4x4.C.o
[ 30%] Building CXX object src/CMakeFiles/wt.dir/Wt/WMeasurePaintDevice.C.o
[ 30%] Built target wtdbomysql
[ 30%] Building CXX object src/CMakeFiles/wt.dir/Wt/WMediaPlayer.C.o
[ 31%] Building CXX object src/CMakeFiles/wt.dir/Wt/WMemoryResource.C.o
[ 31%] Building CXX object src/CMakeFiles/wt.dir/Wt/WMenu.C.o
[ 31%] Building CXX object src/CMakeFiles/wt.dir/Wt/WMenuItem.C.o
[ 31%] Building CXX object src/CMakeFiles/wt.dir/Wt/WMessageBox.C.o
[ 31%] Building CXX object src/CMakeFiles/wt.dir/Wt/WMessageResourceBundle.C.o
[ 31%] Building CXX object src/CMakeFiles/wt.dir/Wt/WMessageResources.C.o
[ 31%] Building CXX object src/CMakeFiles/wt.dir/Wt/WModelIndex.C.o
[ 31%] Building CXX object src/CMakeFiles/wt.dir/Wt/WNavigationBar.C.o
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:16:25: error: redeclaration ‘Wt::ItemDataRole::Display’ differs in ‘constexpr’
 const int ItemDataRole::Display;
                         ^
In file included from /p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:10:0:
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.h:149:30: error: from previous declaration ‘Wt::ItemDataRole::Display’
   static constexpr const int Display = 0;       //!< Role for textual representation
                              ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:16:25: error: declaration of ‘constexpr const int Wt::ItemDataRole::Display’ outside of class is not definition [-fpermissive]
 const int ItemDataRole::Display;
                         ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:17:25: error: redeclaration ‘Wt::ItemDataRole::Decoration’ differs in ‘constexpr’
 const int ItemDataRole::Decoration;
                         ^
In file included from /p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:10:0:
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.h:150:30: error: from previous declaration ‘Wt::ItemDataRole::Decoration’
   static constexpr const int Decoration = 1;    //!< Role for the url of an icon
                              ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:17:25: error: declaration of ‘constexpr const int Wt::ItemDataRole::Decoration’ outside of class is not definition [-fpermissive]
 const int ItemDataRole::Decoration;
                         ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:18:25: error: redeclaration ‘Wt::ItemDataRole::Edit’ differs in ‘constexpr’
 const int ItemDataRole::Edit;
                         ^
In file included from /p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:10:0:
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.h:151:30: error: from previous declaration ‘Wt::ItemDataRole::Edit’
   static constexpr const int Edit = 2;          //!< Role for the edited value
                              ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:18:25: error: declaration of ‘constexpr const int Wt::ItemDataRole::Edit’ outside of class is not definition [-fpermissive]
 const int ItemDataRole::Edit;
                         ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:19:25: error: redeclaration ‘Wt::ItemDataRole::StyleClass’ differs in ‘constexpr’
 const int ItemDataRole::StyleClass;
                         ^
In file included from /p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:10:0:
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.h:152:30: error: from previous declaration ‘Wt::ItemDataRole::StyleClass’
   static constexpr const int StyleClass = 3;    //!< Role for the style class
                              ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:19:25: error: declaration of ‘constexpr const int Wt::ItemDataRole::StyleClass’ outside of class is not definition [-fpermissive]
 const int ItemDataRole::StyleClass;
                         ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:20:25: error: redeclaration ‘Wt::ItemDataRole::Checked’ differs in ‘constexpr’
 const int ItemDataRole::Checked;
                         ^
In file included from /p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:10:0:
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.h:160:30: error: from previous declaration ‘Wt::ItemDataRole::Checked’
   static constexpr const int Checked = 4;
                              ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:20:25: error: declaration of ‘constexpr const int Wt::ItemDataRole::Checked’ outside of class is not definition [-fpermissive]
 const int ItemDataRole::Checked;
                         ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:21:25: error: redeclaration ‘Wt::ItemDataRole::ToolTip’ differs in ‘constexpr’
 const int ItemDataRole::ToolTip;
                         ^
In file included from /p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:10:0:
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.h:161:30: error: from previous declaration ‘Wt::ItemDataRole::ToolTip’
   static constexpr const int ToolTip = 5;         //!< Role for a (plain) tooltip
                              ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:21:25: error: declaration of ‘constexpr const int Wt::ItemDataRole::ToolTip’ outside of class is not definition [-fpermissive]
 const int ItemDataRole::ToolTip;
                         ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:22:25: error: redeclaration ‘Wt::ItemDataRole::Link’ differs in ‘constexpr’
 const int ItemDataRole::Link;
                         ^
In file included from /p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:10:0:
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.h:162:30: error: from previous declaration ‘Wt::ItemDataRole::Link’
   static constexpr const int Link = 6;            //!< Role for a link
                              ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:22:25: error: declaration of ‘constexpr const int Wt::ItemDataRole::Link’ outside of class is not definition [-fpermissive]
 const int ItemDataRole::Link;
                         ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:23:25: error: redeclaration ‘Wt::ItemDataRole::MimeType’ differs in ‘constexpr’
 const int ItemDataRole::MimeType;
                         ^
In file included from /p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:10:0:
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.h:163:30: error: from previous declaration ‘Wt::ItemDataRole::MimeType’
   static constexpr const int MimeType = 7;        //!< Role for mime type information
                              ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:23:25: error: declaration of ‘constexpr const int Wt::ItemDataRole::MimeType’ outside of class is not definition [-fpermissive]
 const int ItemDataRole::MimeType;
                         ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:24:25: error: redeclaration ‘Wt::ItemDataRole::Level’ differs in ‘constexpr’
 const int ItemDataRole::Level;
                         ^
In file included from /p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:10:0:
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.h:164:30: error: from previous declaration ‘Wt::ItemDataRole::Level’
   static constexpr const int Level = 8;           //!< Level in aggregation, for header data.
                              ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:24:25: error: declaration of ‘constexpr const int Wt::ItemDataRole::Level’ outside of class is not definition [-fpermissive]
 const int ItemDataRole::Level;
                         ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:25:25: error: redeclaration ‘Wt::ItemDataRole::MarkerPenColor’ differs in ‘constexpr’
 const int ItemDataRole::MarkerPenColor;
                         ^
In file included from /p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:10:0:
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.h:166:30: error: from previous declaration ‘Wt::ItemDataRole::MarkerPenColor’
   static constexpr const int MarkerPenColor = 16;    //!< Marker pen color (for Chart::WCartesianChart)
                              ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:25:25: error: declaration of ‘constexpr const int Wt::ItemDataRole::MarkerPenColor’ outside of class is not definition [-fpermissive]
 const int ItemDataRole::MarkerPenColor;
                         ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:26:25: error: redeclaration ‘Wt::ItemDataRole::MarkerBrushColor’ differs in ‘constexpr’
 const int ItemDataRole::MarkerBrushColor;
                         ^
In file included from /p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:10:0:
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.h:167:30: error: from previous declaration ‘Wt::ItemDataRole::MarkerBrushColor’
   static constexpr const int MarkerBrushColor = 17;  //!< Marker brush color (for Chart::WCartesianChart)
                              ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:26:25: error: declaration of ‘constexpr const int Wt::ItemDataRole::MarkerBrushColor’ outside of class is not definition [-fpermissive]
 const int ItemDataRole::MarkerBrushColor;
                         ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:27:25: error: redeclaration ‘Wt::ItemDataRole::MarkerScaleFactor’ differs in ‘constexpr’
 const int ItemDataRole::MarkerScaleFactor;
                         ^
In file included from /p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:10:0:
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.h:168:30: error: from previous declaration ‘Wt::ItemDataRole::MarkerScaleFactor’
   static constexpr const int MarkerScaleFactor = 20; //!< Marker size (for Chart::WCartesianChart)
                              ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:27:25: error: declaration of ‘constexpr const int Wt::ItemDataRole::MarkerScaleFactor’ outside of class is not definition [-fpermissive]
 const int ItemDataRole::MarkerScaleFactor;
                         ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:28:25: error: redeclaration ‘Wt::ItemDataRole::BarPenColor’ differs in ‘constexpr’
 const int ItemDataRole::BarPenColor;
                         ^
In file included from /p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:10:0:
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.h:169:30: error: from previous declaration ‘Wt::ItemDataRole::BarPenColor’
   static constexpr const int BarPenColor = 18;   //!< Bar pen color (for Chart::WCartesianChart)
                              ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:28:25: error: declaration of ‘constexpr const int Wt::ItemDataRole::BarPenColor’ outside of class is not definition [-fpermissive]
 const int ItemDataRole::BarPenColor;
                         ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:29:25: error: redeclaration ‘Wt::ItemDataRole::BarBrushColor’ differs in ‘constexpr’
 const int ItemDataRole::BarBrushColor;
                         ^
[ 33%] Building CXX object src/CMakeFiles/wt.dir/Wt/WObject.C.o
In file included from /p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:10:0:
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.h:170:30: error: from previous declaration ‘Wt::ItemDataRole::BarBrushColor’
   static constexpr const int BarBrushColor = 19; //!< Bar brush color (for Chart::WCartesianChart)
                              ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:29:25: error: declaration of ‘constexpr const int Wt::ItemDataRole::BarBrushColor’ outside of class is not definition [-fpermissive]
 const int ItemDataRole::BarBrushColor;
                         ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:30:25: error: redeclaration ‘Wt::ItemDataRole::User’ differs in ‘constexpr’
 const int ItemDataRole::User;
                         ^
In file included from /p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:10:0:
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.h:172:30: error: from previous declaration ‘Wt::ItemDataRole::User’
   static constexpr const int User = 32;           //!< First role reserved for user purposes
                              ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/WModelIndex.C:30:25: error: declaration of ‘constexpr const int Wt::ItemDataRole::User’ outside of class is not definition [-fpermissive]
 const int ItemDataRole::User;
                         ^
make[2]: *** [src/CMakeFiles/wt.dir/Wt/WModelIndex.C.o] Error 1
make[2]: *** Waiting for unfinished jobs....
In file included from /p/tv/local/redhat/wt-4.0.5/src/Wt/Date/date.h:10:0,
                 from /p/tv/local/redhat/wt-4.0.5/src/Wt/Dbo/backend/Postgres.C:32:
/p/tv/local/redhat/wt-4.0.5/src/Wt/Date/include/date/date.h: In instantiation of ‘std::basic_istream<_CharT, _Traits>& date::from_stream(std::basic_istream<_CharT, _Traits>&, const CharT*, date::sys_time<Duration>&, std::basic_string<CharT, Traits, Alloc>*, std::chrono::minutes*) [with Duration = std::chrono::duration<long int, std::ratio<1l, 1000000000l> >; CharT = char; Traits = std::char_traits<char>; Alloc = std::allocator<char>; date::sys_time<Duration> = std::chrono::time_point<std::chrono::_V2::system_clock, std::chrono::duration<long int, std::ratio<1l, 1000000000l> > >; std::chrono::minutes = std::chrono::duration<int, std::ratio<60l> >]’:
/p/tv/local/redhat/wt-4.0.5/src/Wt/Date/include/date/date.h:7245:74:   required from ‘std::basic_istream<_CharT, _Traits>& date::operator>>(std::basic_istream<_CharT, _Traits>&, const date::parse_manip<Parsable, CharT, Traits, Alloc>&) [with Parsable = std::chrono::time_point<std::chrono::_V2::system_clock, std::chrono::duration<long int, std::ratio<1l, 1000000000l> > >; CharT = char; Traits = std::char_traits<char>; Alloc = std::allocator<char>]’
/p/tv/local/redhat/wt-4.0.5/src/Wt/Dbo/backend/Postgres.C:566:37:   required from here
/p/tv/local/redhat/wt-4.0.5/src/Wt/Date/include/date/date.h:4323:5: error: converting to ‘date::weekday’ from initializer list would use explicit constructor ‘constexpr date::weekday::weekday(unsigned int)’
     fields() = default;
     ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/Date/include/date/date.h:7174:20: note: synthesized method ‘date::fields<Duration>::fields() [with Duration = std::chrono::duration<long int, std::ratio<1l, 1000000000l> >]’ first required here 
     fields<CT> fds{};
                    ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/Date/include/date/date.h: In instantiation of ‘std::basic_istream<_CharT, _Traits>& date::from_stream(std::basic_istream<_CharT, _Traits>&, const CharT*, std::chrono::duration<_Rep1, _Period1>&, std::basic_string<CharT, Traits, Alloc>*, std::chrono::minutes*) [with Rep = int; Period = std::ratio<1l, 1000l>; CharT = char; Traits = std::char_traits<char>; Alloc = std::allocator<char>; std::chrono::minutes = std::chrono::duration<int, std::ratio<60l> >]’:
/p/tv/local/redhat/wt-4.0.5/src/Wt/Date/include/date/date.h:7245:74:   required from ‘std::basic_istream<_CharT, _Traits>& date::operator>>(std::basic_istream<_CharT, _Traits>&, const date::parse_manip<Parsable, CharT, Traits, Alloc>&) [with Parsable = std::chrono::duration<int, std::ratio<1l, 1000l> >; CharT = char; Traits = std::char_traits<char>; Alloc = std::allocator<char>]’
/p/tv/local/redhat/wt-4.0.5/src/Wt/Dbo/backend/Postgres.C:601:35:   required from here
/p/tv/local/redhat/wt-4.0.5/src/Wt/Date/include/date/date.h:4323:5: error: converting to ‘date::weekday’ from initializer list would use explicit constructor ‘constexpr date::weekday::weekday(unsigned int)’
     fields() = default;
     ^
/p/tv/local/redhat/wt-4.0.5/src/Wt/Date/include/date/date.h:7212:20: note: synthesized method ‘date::fields<Duration>::fields() [with Duration = std::chrono::duration<long int, std::ratio<1l, 1000l> >]’ first required here 
     fields<CT> fds{};
                    ^
make[2]: *** [src/Wt/Dbo/backend/CMakeFiles/wtdbopostgres.dir/Postgres.C.o] Error 1
make[1]: *** [src/Wt/Dbo/backend/CMakeFiles/wtdbopostgres.dir/all] Error 2
make[1]: *** [src/CMakeFiles/wt.dir/all] Error 2
[ 33%] Linking CXX shared library libwtdbosqlite3.so
[ 33%] Built target wtdbosqlite3
make: *** [all] Error 2

RedHat 7, tried multiple GCC that output is with 5.4.0, getting the same with 9.0.1

And I am confused why codecvt isnt found since it should be part of std by now.

Wish I could edit the formatting, sorry about that