Cannot Build Qt5.14 from Git on Centos7.9

kimi.raikkonen

Hi everyone, I'm trying to build Qt5.14 on my new Centos7.9 virtual machine. To do that, I followed the instructions here. But at the building step (make -j$(nproc)), I got an error:

In file included from /opt/rh/devtoolset-7/root/usr/include/c++/7/bits/stl_algo.h:60:0,
                 from /opt/rh/devtoolset-7/root/usr/include/c++/7/algorithm:62,
                 from ../../include/QtCore/../../../../qt5/qtbase/src/corelib/global/qglobal.h:142,
                 from ../../include/QtCore/qglobal.h:1,
                 from ../../include/QtGui/../../../../qt5/qtbase/src/gui/kernel/qtguiglobal.h:43,
                 from ../../include/QtGui/qtguiglobal.h:1,
                 from /home/myUsr/qt5/qtbase/src/gui/text/qabstracttextdocumentlayout.h:43:
/opt/rh/devtoolset-7/root/usr/include/c++/7/bits/algorithmfwd.h:504:39: error: expected nested-name-specifier before ‘_Compare’
   template<typename _RAIter, typename _Compare>
                                       ^~~~~~~~
In file included from /home/myUsr/qt5/qtbase/src/gui/text/qabstracttextdocumentlayout.h:1:0:


Internal compiler error: Error reporting routines re-entered.
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://bugzilla.redhat.com/bugzilla> for instructions.
The bug is not reproducible, so it is likely a hardware or OS problem.

I have already done this:

$ export LLVM_INSTALL_DIR=/usr/llvm

and this:

$ ../qt5/configure -developer-build -opensource -nomake examples -nomake tests

I repeated the whole process from scratch (by make clean and than make again) but nothing worked.
I also tried gmake and make other than make -j$(nproc)

jsulm

@kimi-raikkonen said in Cannot Build Qt5.14 from Git on Centos7.9:

virtual machine

What is the RAM size of your virtual machine?
Internal compiler errors are often caused by out of RAM.

kimi.raikkonen

@jsulm It is 4096 MB.

jsulm

@kimi-raikkonen said in Cannot Build Qt5.14 from Git on Centos7.9:

It is 4096 MB.

I would try with more if possible.

JoeCFD

what is your gcc version?
gcc --version

kimi.raikkonen

@JoeCFD I followed the document, hence it is 7.3.1.

kimi.raikkonen

@jsulm I just increased the memory but every time I try, I get different errors. So, it fails to build Qt. I ordered a new 8 GB RAM. It will be 16 GB in total. I will try again then with even more memory.

jsulm

@kimi-raikkonen said in Cannot Build Qt5.14 from Git on Centos7.9:

I get different errors

Internal compiler errors or something else?

kimi.raikkonen

@jsulm Yes, I do get internal compiler errors. But also other errors like this, a syntax error which is so weird.

In file included from ../../include/QtCore/qdebug.h:1:0,
                 from ../../include/QtCore/QDebug:1,
                 from /home/myUsr/qt5/qtbase/src/corelib/io/qfileselector.cpp:51:
../../include/QtCore/../../../../qt5/qtbase/src/corelib/io/qdebug.h:142:1: error: ‘har’ does not name a type; did you mean ‘char’?
     inline QDebug &operator<<(QChar t) { putUcs4(t.unicode()); return maybeSpace(); }
 ^  
 char
../../include/QtCore/../../../../qt5/qtbase/src/corelib/io/qdebug.h: In member function ‘QDebug& QDebug::operator<<(char16_t)’:
../../include/QtCore/../../../../qt5/qtbase/src/corelib/io/qdebug.h:148:58: error: ambiguous overload for ‘operator<<’ (operand types are ‘QDebug’ and ‘QChar’)
     inline QDebug &operator<<(char16_t t) { return *this << QChar(ushort(t)); }
                                                    ~~~~~~^~~~~~~~~~~~~~~~~~~
../../include/QtCore/../../../../qt5/qtbase/src/corelib/io/qdebug.h:161:20: note: candidate: QDebug& QDebug::operator<<(const QString&)
     inline QDebug &operator<<(const QString & t) { putString(t.constData(), uint(t.length())); return maybeSpace(); }
                    ^~~~~~~~
In file included from ../../include/QtCore/qvariant.h:1:0,
                 from /home/myUsr/qt5/qtbase/src/corelib/global/qt_pch.h:70:
../../include/QtCore/../../../../qt5/qtbase/src/corelib/kernel/qvariant.h:901:22: note: candidate: QDebug operator<<(QDebug, const QVariant&)
 Q_CORE_EXPORT QDebug operator<<(QDebug, const QVariant &);
                      ^~~~~~~~
gmake[3]: *** [.obj/qfileselector.o] Error 1
gmake[3]: Leaving directory `/home/myUsr/qt5-build/qtbase/src/corelib'
gmake[2]: *** [sub-corelib-make_first] Error 2
gmake[2]: Leaving directory `/home/myUsr/qt5-build/qtbase/src'
gmake[1]: *** [sub-src-make_first] Error 2
gmake[1]: Leaving directory `/home/myUsr/qt5-build/qtbase'
gmake: *** [module-qtbase-make_first] Error 2

jsulm

@kimi-raikkonen said in Cannot Build Qt5.14 from Git on Centos7.9:

qdebug.h:142:1: error: ‘har’ does not name a type; did

This looks like a typo. You can check what is in line 142 in qdebug.h
How did you get Qt source code?

kimi.raikkonen

First, I cloned Qt 5 git repo, then checked out the version (5.14) and finally did that:

$ perl init-repository --module-subset=default,-qtwebengine,-qtandroidextras,-qtmacextras,-qtpurchasing