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