Error while building Qt from source

[mukul]

I am getting these errors while make command is executed. I am building from source by following the website instructions.

from ../../corelib/global/qglobal.cpp:48:
../../../include/QtCore/../../src/corelib/kernel/qvariant.h: In constructor ‘QVariant::QVariant(QVariant&&)’:
../../../include/QtCore/../../src/corelib/kernel/qvariant.h:265:25: error: implicitly-declared ‘constexpr QVariant::Private& QVariant::Private::operator=(const QVariant::Private&)’ is deprecated [-Werror=deprecated-copy]
265 | { other.d = Private(); }
| ^
../../../include/QtCore/../../src/corelib/kernel/qvariant.h:380:16: note: because ‘QVariant::Private’ has user-provided ‘QVariant::Private::Private(const QVariant::Private&)’
380 | inline Private(const Private &other) Q_DECL_NOTHROW
| ^~~~~~~
cc1plus: all warnings being treated as errors
Makefile:1029: recipe for target '.obj/qglobal.o' failed
make[3]: *** [.obj/qglobal.o] Error 1
make[3]: Leaving directory '/home/mukul/qt5/qtbase/src/tools/bootstrap'
Makefile:64: recipe for target 'sub-bootstrap-make_first' failed
make[2]: *** [sub-bootstrap-make_first] Error 2
make[2]: Leaving directory '/home/mukul/qt5/qtbase/src'
Makefile:46: recipe for target 'sub-src-make_first' failed
make[1]: *** [sub-src-make_first] Error 2
make[1]: Leaving directory '/home/mukul/qt5/qtbase'
Makefile:88: recipe for target 'module-qtbase-make_first' failed
make: *** [module-qtbase-make_first] Error 2

Please help !!

[sierdzio]

• which Qt version?
• which operating system?
• please specify your configure line

all warnings being treated as errors

This can be turned off, for example by not making a developer-build.

[mukul]

I am building version 5.13 for kde neon. I am building open source version from git.

[SGaist]

Hi,

From git or from the source tar archive ?

[mukul]

@SGaist from git following website instructions.

[SGaist]

Which instructions ?

[sierdzio]

These? https://wiki.qt.io/Building_Qt_5_from_Git

As said, do not use -developer-build flag unless you have to. If you are building Qt for own use, it's easier to use tarballs.

[mukul]

@sierdzio I haven't used this flag.

[mukul]

I got the errors after removing the flag too. I am a bit new to this, Can u please tell me how to build from tarballs?

[SGaist]

Similar procedure:

• Download tarball
• Uncompress
• Create a build folder outside sources
• Go inside build folder
• Call configure with full path
• Build
• Install
• Hack