https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97284
--- Comment #9 from Martin Liška <marxin at gcc dot gnu.org> --- (In reply to Ville Voutilainen from comment #8) > Also, you can just try the actual build, if you follow > https://wiki.qt.io/Building_Qt_6_from_Git I tried, but it fails quite fast with: /home/marxin/bin/gcc/bin/c++ -DHAVE_CONFIG_H -DPCRE2_CODE_UNIT_WIDTH=16 -DPCRE2_DISABLE_JIT -DQT_BOOTSTRAPPED -DQT_NO_CAST_FROM_ASCII -DQT_NO_CAST_TO_ASCII -DQT_NO_DEBUG -DQT_NO_FOREACH -DQT_USE_QSTRINGBUILDER -DQT_VERSION_MAJOR=6 -DQT_VERSION_MINOR=0 -DQT_VERSION_PATCH=1 -DQT_VERSION_STR=\"6.0.1\" -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -I../qtbase/src/tools/bootstrap/../../3rdparty/pcre2/src -Iqtbase/src/corelib/Core_autogen/include -Iqtbase/include -Iqtbase/include/QtCore -I../qtbase/src/corelib -Iqtbase/src/corelib -Iqtbase/src/corelib/global -I../qtbase/src/corelib/../3rdparty/tinycbor/src -Iqtbase/include/QtCore/6.0.1 -Iqtbase/include/QtCore/6.0.1/QtCore -I../qtbase/src/corelib/../3rdparty/forkfd -Iqtbase/src/corelib/.rcc -I../qtbase/mkspecs/linux-g++ -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -Iqtbase/src/xml/Xml_autogen/include -Iqtbase/include/QtXml -I../qtbase/src/xml -Iqtbase/src/xml -Iqtbase/include/QtXml/6.0.1 -Iqtbase/include/QtXml/6.0.1/QtXml -I../qtbase/src/tools/bootstrap/.. -I../qtbase/src/tools/bootstrap/../../3rdparty/tinycbor/src -DNDEBUG -O2 -fPIC -fvisibility=hidden -fvisibility-inlines-hidden -Wall -Wextra -ffunction-sections -fdata-sections -Wsuggest-override -std=gnu++17 -MD -MT qtbase/src/tools/bootstrap/CMakeFiles/Bootstrap.dir/__/__/corelib/global/qfloat16.cpp.o -MF qtbase/src/tools/bootstrap/CMakeFiles/Bootstrap.dir/__/__/corelib/global/qfloat16.cpp.o.d -o qtbase/src/tools/bootstrap/CMakeFiles/Bootstrap.dir/__/__/corelib/global/qfloat16.cpp.o -c ../qtbase/src/corelib/global/qfloat16.cpp In file included from qtbase/include/QtCore/qanystringview.h:1, from qtbase/include/QtCore/../../../../qtbase/src/corelib/text/qstring.h:56, from qtbase/include/QtCore/qstring.h:1, from qtbase/include/QtCore/../../../../qtbase/src/corelib/tools/qhashfunctions.h:44, from qtbase/include/QtCore/qhashfunctions.h:1, from qtbase/include/QtCore/../../../../qtbase/src/corelib/tools/qvarlengtharray.h:47, from qtbase/include/QtCore/qvarlengtharray.h:1, from qtbase/include/QtCore/../../../../qtbase/src/corelib/kernel/qmetatype.h:49, from qtbase/include/QtCore/qmetatype.h:1, from ../qtbase/src/corelib/global/qfloat16.h:45, from ../qtbase/src/corelib/global/qfloat16.cpp:41: qtbase/include/QtCore/../../../../qtbase/src/corelib/text/qanystringview.h:250:46: error: ‘numeric_limits’ is not a member of ‘std’ 250 | static constexpr size_t SizeMask = (std::numeric_limits<size_t>::max)() / 4; | ^~~~~~~~~~~~~~ qtbase/include/QtCore/../../../../qtbase/src/corelib/text/qanystringview.h:250:67: error: expected primary-expression before ‘>’ token 250 | static constexpr size_t SizeMask = (std::numeric_limits<size_t>::max)() / 4; | ^ qtbase/include/QtCore/../../../../qtbase/src/corelib/text/qanystringview.h:250:70: error: ‘::max’ has not been declared; did you mean ‘std::max’? 250 | static constexpr size_t SizeMask = (std::numeric_limits<size_t>::max)() / 4; | ^~~ | std::max In file included from /home/marxin/bin/gcc/include/c++/11.0.0/algorithm:62, from qtbase/include/QtCore/../../../../qtbase/src/corelib/global/qglobal.h:126, from qtbase/include/QtCore/qglobal.h:1, from ../qtbase/src/corelib/global/qfloat16.h:44, from ../qtbase/src/corelib/global/qfloat16.cpp:41: /home/marxin/bin/gcc/include/c++/11.0.0/bits/stl_algo.h:3467:5: note: ‘std::max’ declared here 3467 | max(initializer_list<_Tp> __l, _Compare __comp) | ^~~ In file included from qtbase/include/QtCore/qanystringview.h:1, from qtbase/include/QtCore/../../../../qtbase/src/corelib/text/qstring.h:56, from qtbase/include/QtCore/qstring.h:1, from qtbase/include/QtCore/../../../../qtbase/src/corelib/tools/qhashfunctions.h:44, from qtbase/include/QtCore/qhashfunctions.h:1, from qtbase/include/QtCore/../../../../qtbase/src/corelib/tools/qvarlengtharray.h:47, from qtbase/include/QtCore/qvarlengtharray.h:1, from qtbase/include/QtCore/../../../../qtbase/src/corelib/kernel/qmetatype.h:49, from qtbase/include/QtCore/qmetatype.h:1, from ../qtbase/src/corelib/global/qfloat16.h:45, from ../qtbase/src/corelib/global/qfloat16.cpp:41: qtbase/include/QtCore/../../../../qtbase/src/corelib/text/qanystringview.h:253:46: error: ‘numeric_limits’ is not a member of ‘std’ 253 | static constexpr size_t TypeMask = (std::numeric_limits<size_t>::max)() & ~SizeMask; | ^~~~~~~~~~~~~~ qtbase/include/QtCore/../../../../qtbase/src/corelib/text/qanystringview.h:253:67: error: expected primary-expression before ‘>’ token 253 | static constexpr size_t TypeMask = (std::numeric_limits<size_t>::max)() & ~SizeMask; | ^ qtbase/include/QtCore/../../../../qtbase/src/corelib/text/qanystringview.h:253:70: error: ‘::max’ has not been declared; did you mean ‘std::max’? 253 | static constexpr size_t TypeMask = (std::numeric_limits<size_t>::max)() & ~SizeMask; | ^~~ | std::max In file included from /home/marxin/bin/gcc/include/c++/11.0.0/algorithm:62, from qtbase/include/QtCore/../../../../qtbase/src/corelib/global/qglobal.h:126, from qtbase/include/QtCore/qglobal.h:1, from ../qtbase/src/corelib/global/qfloat16.h:44, from ../qtbase/src/corelib/global/qfloat16.cpp:41: /home/marxin/bin/gcc/include/c++/11.0.0/bits/stl_algo.h:3467:5: note: ‘std::max’ declared here 3467 | max(initializer_list<_Tp> __l, _Compare __comp) | ^~~ In file included from qtbase/include/QtCore/qanystringview.h:1, from qtbase/include/QtCore/../../../../qtbase/src/corelib/text/qstring.h:56, from qtbase/include/QtCore/qstring.h:1, from qtbase/include/QtCore/../../../../qtbase/src/corelib/tools/qhashfunctions.h:44, from qtbase/include/QtCore/qhashfunctions.h:1, from qtbase/include/QtCore/../../../../qtbase/src/corelib/tools/qvarlengtharray.h:47, from qtbase/include/QtCore/qvarlengtharray.h:1, from qtbase/include/QtCore/../../../../qtbase/src/corelib/kernel/qmetatype.h:49, from qtbase/include/QtCore/qmetatype.h:1, from ../qtbase/src/corelib/global/qfloat16.h:45, from ../qtbase/src/corelib/global/qfloat16.cpp:41: qtbase/include/QtCore/../../../../qtbase/src/corelib/text/qanystringview.h:254:28: error: non-constant condition for static assertion 254 | static_assert(TypeMask == (Latin1Flag|TwoByteCodePointFlag)); | ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ qtbase/include/QtCore/../../../../qtbase/src/corelib/text/qanystringview.h:264:20: error: enumerator value for ‘Latin1’ is not an integer constant 264 | Latin1 = Latin1Flag, | ^~~~~~~~~~ qtbase/include/QtCore/../../../../qtbase/src/corelib/text/qanystringview.h:265:20: error: enumerator value for ‘Utf16’ is not an integer constant 265 | Utf16 = TwoByteCodePointFlag, | ^~~~~~~~~~~~~~~~~~~~ qtbase/include/QtCore/../../../../qtbase/src/corelib/text/qanystringview.h:266:20: error: enumerator value for ‘Unused’ is not an integer constant 266 | Unused = TypeMask, | ^~~~~~~~
