[Interest] Build Qt Source (mac): 'make' immediately hits an error ?

[David M. Cotter]

yes, the compiler (xcode) i was using was too old. i updated xcode to a later version and it works.
sorry, i should have posted that i had a solution earlier!

-dave

> On Jun 27, 2021, at 11:04 PM, David Skoland <david.skoland at qt.io> wrote:
> 
> Hi,
> 
> It looks like the source is expecting C++17, but that wasn’t included in the compiler flags, I’m guessing.
> 
> Which version of Qt5 is this? May I also ask why you want to compile from git?
> 
> Cheers,
> 
> David Skoland
> 
>> On 27 Jun 2021, at 02:58, David M. Cotter <dave at kjams.com <mailto:dave at kjams.com>> wrote:
>> 
>> got all the way through "build from git" instructions, to the point where i execute "make", but immediately got this error:
>> 
>>> luna:clang_64 davec$ make
>>> Scanning dependencies of target Bootstrap
>>> [  0%] Building CXX object qtbase/src/tools/bootstrap/CMakeFiles/Bootstrap.dir/__/__/corelib/global/qendian.cpp.o
>>> In file included from /Volumes/Developer/depot/Qt5_Source/Src/qtbase/src/corelib/global/qendian.cpp:41:
>>> In file included from /Volumes/Developer/depot/Qt5_Source/Src/qtbase/src/corelib/global/qendian.h:44:
>>> In file included from /Volumes/Developer/depot/Qt5_Source/clang_64/qtbase/include/QtCore/qfloat16.h:1:
>>> In file included from /Volumes/Developer/depot/Qt5_Source/clang_64/qtbase/include/QtCore/../../../../Src/qtbase/src/corelib/global/qfloat16.h:44:
>>> In file included from /Volumes/Developer/depot/Qt5_Source/clang_64/qtbase/include/QtCore/qglobal.h:1:
>>> In file included from /Volumes/Developer/depot/Qt5_Source/clang_64/qtbase/include/QtCore/../../../../Src/qtbase/src/corelib/global/qglobal.h:1417:
>>> In file included from /Volumes/Developer/depot/Qt5_Source/clang_64/qtbase/include/QtCore/qtypeinfo.h:1:
>>> /Volumes/Developer/depot/Qt5_Source/clang_64/qtbase/include/QtCore/../../../../Src/qtbase/src/corelib/global/qtypeinfo.h:43:10: fatal error: 'variant' file not
>>>       found
>>> #include <variant>
>>>          ^~~~~~~~~
>>> 1 error generated.
>>> make[2]: *** [qtbase/src/tools/bootstrap/CMakeFiles/Bootstrap.dir/__/__/corelib/global/qendian.cpp.o] Error 1
>>> make[1]: *** [qtbase/src/tools/bootstrap/CMakeFiles/Bootstrap.dir/all] Error 2
>>> make: *** [all] Error 2
>> anyone have any ideas?
>> anyone want to make a few bucks helping me?
>> -dave
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