Qt FTBFS on clang when C++20 is enabled

[2/3] Building CXX object tests/auto/corelib/global/qcomparehelpers/CMakeFiles/tst_qcomparehelpers_cpp23.dir/tst_qcomparehelpers.cpp.o
FAILED: tests/auto/corelib/global/qcomparehelpers/CMakeFiles/tst_qcomparehelpers_cpp23.dir/tst_qcomparehelpers.cpp.o
/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/recipe-sysroot-native/usr/bin/riscv64-yoe-linux/riscv64-yoe-linux-clang++ --sysroot=/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/recipe-sysroot -DQT_CORE_LIB -DQT_DISABLE_DEPRECATED_UP_TO=0x050000 -DQT_EXPLICIT_QFILE_CONSTRUCTION_FROM_PATH -DQT_LEAN_HEADERS=1 -DQT_NO_AS_CONST -DQT_NO_DEBUG -DQT_NO_FOREACH -DQT_NO_JAVA_STYLE_ITERATORS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_QEXCHANGE -DQT_TESTCASE_BUILDDIR=\"\" -DQT_TESTCASE_SOURCEDIR=\"\" -DQT_TESTLIB_LIB -DQT_WARN_DEPRECATED_UP_TO=0x070000 -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -Dtst_QCompareHelpers=tst_QCompareHelpersCpp23 -I/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/build-ptest/tests/auto/corelib/global/qcomparehelpers/tst_qcomparehelpers_cpp23_autogen/include -I/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/git/tests/auto/corelib/global/qcomparehelpers -I/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/build-ptest/tests/auto/corelib/global/qcomparehelpers -I/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/build-ptest/include -isystem /mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/image/usr/include/QtTest/6.7.3 -isystem /mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/image/usr/include/QtTest/6.7.3/QtTest -isystem /mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/image/usr/include/QtCore/6.7.3 -isystem /mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/image/usr/include/QtCore/6.7.3/QtCore -isystem /mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/image/usr/include/QtCore -isystem /mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/image/usr/include -isystem /mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/image/usr/lib/mkspecs/linux-clang -isystem /mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/image/usr/include/QtTest -target riscv64-yoe-linux     -mlittle-endian --dyld-prefix=/usr -Qunused-arguments -fstack-protector-strong  -O2 -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Werror=format-security  --sysroot=/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/recipe-sysroot  -O2 -pipe -g -feliminate-unused-debug-types   -fmacro-prefix-map=/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/git=/usr/src/debug/qtbase/6.7.3  -fdebug-prefix-map=/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/git=/usr/src/debug/qtbase/6.7.3  -fmacro-prefix-map=/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/build=/usr/src/debug/qtbase/6.7.3  -fdebug-prefix-map=/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/build=/usr/src/debug/qtbase/6.7.3  -fdebug-prefix-map=/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/recipe-sysroot=  -fmacro-prefix-map=/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/recipe-sysroot=  -fdebug-prefix-map=/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/recipe-sysroot-native=   -fmacro-prefix-map=/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/image=  -fvisibility-inlines-hidden  -DNDEBUG -O2 -std=gnu++23 -fPIE -fvisibility=hidden -fvisibility-inlines-hidden -Wall -Wextra -fexceptions -MD -MT tests/auto/corelib/global/qcomparehelpers/CMakeFiles/tst_qcomparehelpers_cpp23.dir/tst_qcomparehelpers.cpp.o -MF tests/auto/corelib/global/qcomparehelpers/CMakeFiles/tst_qcomparehelpers_cpp23.dir/tst_qcomparehelpers.cpp.o.d -o tests/auto/corelib/global/qcomparehelpers/CMakeFiles/tst_qcomparehelpers_cpp23.dir/tst_qcomparehelpers.cpp.o -c /mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/git/tests/auto/corelib/global/qcomparehelpers/tst_qcomparehelpers.cpp
In file included from /mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/git/tests/auto/corelib/global/qcomparehelpers/tst_qcomparehelpers.cpp:4:
In file included from /mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/git/tests/auto/corelib/global/qcomparehelpers/tst_qcomparehelpers.h:10:
/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/image/usr/include/QtTest/6.7.3/QtTest/private/qcomparisontesthelper_p.h:246:49: error: use of overloaded operator '==' is ambiguous (with operand types 'std::strong_ordering' and 'const partial_ordering')
  246 |     const bool expectedEqual = expectedOrdering == Qt::partial_ordering::equivalent;
      |                                ~~~~~~~~~~~~~~~~ ^  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/git/tests/auto/corelib/global/qcomparehelpers/tst_qcomparehelpers.cpp:29:5: note: in instantiation of function template specialization 'QTestPrivate::testAllComparisonOperators<IntWrapper, IntWrapper, std::strong_ordering>' requested here
   29 |     QT_TEST_ALL_COMPARISON_OPS(lhs, rhs, QtOrderingPrivate::to_std(expectedOrdering));
      |     ^
/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/image/usr/include/QtTest/6.7.3/QtTest/private/qcomparisontesthelper_p.h:365:23: note: expanded from macro 'QT_TEST_ALL_COMPARISON_OPS'
  365 |         QTestPrivate::testAllComparisonOperators(Left, Right, Expected); \
      |                       ^
/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/git/tests/auto/corelib/global/qcomparehelpers/tst_qcomparehelpers.cpp:147:5: note: in instantiation of function template specialization 'tst_QCompareHelpersCpp23::compareImpl<IntWrapper, IntWrapper, Qt::strong_ordering>' requested here
  147 |     compareImpl<IntWrapper, IntWrapper, Qt::strong_ordering>();
      |     ^
/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/recipe-sysroot/usr/include/c++/v1/__compare/ordering.h:213:47: note: candidate function
  213 |   _LIBCPP_HIDE_FROM_ABI friend constexpr bool operator==(strong_ordering __v, _CmpUnspecifiedParam) noexcept {
      |                                               ^
/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/image/usr/include/QtCore/qcompare.h:175:27: note: candidate function (with reversed parameter order)
  175 |     friend constexpr bool operator==(partial_ordering lhs, std::partial_ordering rhs) noexcept
      |                           ^
/mnt/b/yoe/master/build/tmp/work/riscv64-yoe-linux/qtbase/6.7.3/image/usr/include/QtCore/qcompare.h:181:27: note: candidate function
  181 |     friend constexpr bool operator==(std::partial_ordering lhs, partial_ordering rhs) noexcept
      |                           ^

#include <compare>

struct P {
    P();
    P(std::partial_ordering);
    friend bool operator==(P, std::partial_ordering);
};

int main()
{
    P p;
    std::strong_ordering::equivalent == p;
}