Uploaded image for project: 'Qt'
  1. Qt
  2. QTBUG-94006

Qt 6 dev, C++20, clang, libstdc++-11 : does not build

    XMLWordPrintable

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Not Evaluated
    • Resolution: Duplicate
    • Affects Version/s: 6.2
    • Fix Version/s: None
    • Component/s: Core: Other
    • Labels:
      None
    • Platform/s:
      All

      Description

      Hello,

      when trying to use current Qt dev with clang, on Linux, with -std=c++20, and gcc-11's standard library, I get the following :

      In file included from /opt/qt6/include/QtCore/qobject.h:57:
      /opt/qt6/include/QtCore/qproperty.h:105:72: error: no type named 'source_location' in namespace 'std'
       QPropertyBindingSourceLocation(const QT_SOURCE_LOCATION_NAMESPACE::source_location &cppLocation)
       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
      /opt/qt6/include/QtCore/qproperty.h:200:92: error: no member named 'source_location' in namespace 'std'
       auto makePropertyBinding(Functor &&f, const QPropertyBindingSourceLocation &location = QT_PROPERTY_DEFAULT_BINDING_LOCATION,
       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      

      It seems that clang provides the source_location header, but without the content :

      #include <source_location>
      std::source_location x;
      

      builds fine with

      g++ -std=c++20 -c foo.cpp

      but not with

      clang++ -std=c++20 -c foo.cpp

      (which uses libstdc++ by default)

      Both seem to support the __cpp_lib_source_location feature test macro, if that can be of any use.

        Attachments

          Issue Links

          No reviews matched the request. Check your Options in the drop-down menu of this sections header.

            Activity

              People

              Assignee:
              thiago Thiago Macieira
              Reporter:
              jcelerier Jean-Michaƫl Celerier
              Votes:
              0 Vote for this issue
              Watchers:
              2 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved:

                  Gerrit Reviews

                  There are no open Gerrit changes