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recent qt6 requires c++20

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There are warnings within the qt6 header files if c++20 is not used, for example:

usr/include/x86_64-linux-gnu/qt6/QtCore/qfuturesynchronizer.h:21:5: warning: use of the 'nodiscard' attribute is a C++20 extension [-Wc++20-attribute-extensions]
   21 |     Q_NODISCARD_CTOR_X("Use future.waitForFinished() instead.")
      |     ^
/usr/include/x86_64-linux-gnu/qt6/QtCore/qcompilerdetection.h:972:43: note: expanded from macro 'Q_NODISCARD_CTOR_X'
  972 | #    define Q_NODISCARD_CTOR_X(message) [[nodiscard(message)]]
      |                                           ^
1 warning generated.

qmake6 --version
QMake version 3.1
Using Qt version 6.8.3 in /usr/lib/x86_64-linux-gnu
This commit is contained in:
nhmall
2025-06-29 11:59:07 -04:00
parent 8d8867007f
commit 34b42d2354
2 changed files with 15 additions and 1 deletions
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2
sys/unix/hints/include/multiw-2.370
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@@ -163,7 +163,7 @@ ifndef CPLUSPLUS_NEEDED
CPLUSPLUS_NEEDED = 1
endif # CPLUSPLUS_NEEDED
ifdef WANT_WIN_QT6
CPLUSPLUS_NEED17 = 1
CPLUSPLUS_NEED20 = 1
CPLUSPLUS_NEED_DEPSUPPRESS = 1
endif # WANT_WIN_QT6
endif # WANT_WIN_QT