QT5 build: CC: No such file or directory

Michele31415

I'm just following the recipe here: https://wiki.qt.io/Building_Qt_5_from_Git

$ mkdir qt5-build
$ cd qt5-build
$ ..\\qt5\configure -developer-build -opensource -nomake examples -nomake tests

In any event distclean did not work for me.

/opt/qt5/qtbase $ gmake distclean
gmake: *** No rule to make target 'distclean'.  Stop.
/opt/qt5/qtbase $

Update: Oh dear - I just noticed I somehow ended up in qtbase rather than qt5-build. Why don't I just start over.

SGaist

Well, since you are getting started, it's not a bad idea to just build qtbase. You can then build the rest later on.

Michele31415

I just started over from scratch. This time it almost finished:

..Done.
Info: creating stash file /opt/qt5/qt5-build/.qmake.stash
Info: creating super cache file /opt/qt5/qt5-build/.qmake.super

Running configuration tests...
Checking for gold linker... yes
Checking for valid makespec... 
ERROR: Cannot compile a minimal program. The toolchain or QMakeSpec is broken.

Check config.log for details.

/opt/qt5/qt5-build $ cat config.log
executing config test use_gold_linker
+ cd /opt/qt5/qt5-build/qtbase/config.tests && /usr/gcc/10/bin/g++ -fuse-ld=gold -o conftest-out conftest.cpp
test config.qtbase.tests.use_gold_linker succeeded
executing config test verifyspec
+ cd /opt/qt5/qt5-build/qtbase/config.tests/common/verifyspec && /opt/qt5/qt5-build/qtbase/bin/qmake -qtconf /opt/qt5/qt5-build/qtbase/bin/qt.conf "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared use_gold_linker console" /opt/qt5/qtbase/config.tests/common/verifyspec
+ cd /opt/qt5/qt5-build/qtbase/config.tests/common/verifyspec && MAKEFLAGS= /opt/csw/bin/gmake
> /usr/gcc/10/bin/g++ -c -O2  -I/opt/qt5/qtbase/config.tests/common/verifyspec -I. -I/usr/sfw/include -I/opt/qt5/qtbase/mkspecs/solaris-cc -o verifyspec.o /opt/qt5/qtbase/config.tests/common/verifyspec/verifyspec.cpp
> CC  -o verifyspec verifyspec.o   -L/usr/sfw/lib 
> gmake: CC: No such file or directory
> gmake: *** [Makefile:64: verifyspec] Error 127
/opt/qt5/qt5-build $

So it looks like we're back to this "no CC" business. I thought I had fixed that with the following change to qtbase/mkspecs/mkspec.conf:

#QMAKE_CXX               = CC
QMAKE_CXX               = /usr/gcc/10/bin/g++

Technically this was more of an end-run than a fix. I still don't know where CC is being set. So there must be another instance somewhere I can't find.

SGaist

Silly question but did you check your environment variables ?

Note that you seem to set only QMAKE_CXX, did you also set the other one ?

Michele31415

Yes, I also said this in qtbase/mkspecs/mkspec.conf

#QMAKE_COMPILER          = sun_cc
QMAKE_COMPILER          = gcc

Env vars are:

/opt/qt5/qt5-build $ echo $CC
/usr/gcc/10/bin/gcc
/opt/qt5/qt5-build $ echo $CXX
/usr/gcc/10/bin/g++
/opt/qt5/qt5-build $ which gcc
/usr/gcc/10/bin/gcc
/opt/qt5/qt5-build $ gcc --version
gcc (GCC) 10.2.0
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

/opt/qt5/qt5-build $ g++ --version
g++ (GCC) 10.2.0
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

/opt/qt5/qt5-build $ which gcc

Do I need anything else there?

SGaist

What about the QMAKE_CC variable ?

Michele31415

That's set too:

# QMAKE_COMPILER          = sun_cc
QMAKE_COMPILER          = gcc

QMAKE_CC                = gcc

SGaist

I just realized, did you try to specific the platform in your configure options ?

Michele31415

Uh, I guess not. What file would that be?

SGaist

Based on the mkspecs available, I would try the solaris-g++ or solaris-g++-64.

Michele31415

DING!! Give that man a ceegar! Thank you so much.

...(bunch of stuff) ...
Qt WebEngine:
  Proprietary Codecs ..................... no
  Spellchecker ........................... yes
  ALSA ................................... no
  PulseAudio ............................. no

Note: No wayland-egl support detected. Cross-toolkit compatibility disabled.



**Qt is now configured for building.** Just run 'gmake'.
Once everything is built, you must run 'gmake install'.
Qt will be installed into

Prior to reconfiguration, make sure you remove any leftovers from
the previous build.
/opt/qt5/qt5-build $

For the record, this is the command that worked:

/opt/qt5/qt5-build $ ../configure -developer-build -opensource -nomake examples -nomake tests -platform solaris-g++

I'm so happy I'm just going to let it go for now and wait til tomorrow to try the gmake :-)

I am wondering about that "remove any leftovers" comment. Is that anything in particular?

Michele31415

Well gmake ran for a long time but finally gave up. This is the tail of the tale:

../../../../include/QtGui/../../../../qtbase/src/gui/painting/qtransform.h:57:20: note: ‘class QTransform’ declared here
   57 | class Q_GUI_EXPORT QTransform
      |                    ^~~~~~~~~~
../../../../include/QtGui/../../../../qtbase/src/gui/painting/qtransform.h: In copy constructor ‘QTransform::QTransform(const QTransform&)’:
../../../../include/QtGui/../../../../qtbase/src/gui/painting/qtransform.h:88:46: warning: ‘void* std::memcpy(void*, const void*, std::size_t)’ writing to an object of type ‘class QTransform’ with no trivial copy-assignment; use copy-assignment or copy-initialization instead []8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wclass-memaccess-Wclass-memaccess]8;;]
   88 |     { memcpy(this, &other, sizeof(QTransform)); }
      |                                              ^
../../../../include/QtGui/../../../../qtbase/src/gui/painting/qtransform.h:57:20: note: ‘class QTransform’ declared here
   57 | class Q_GUI_EXPORT QTransform
      |                    ^~~~~~~~~~
In file included from /opt/qt5/qtbase/src/plugins/platforms/vnc/qvnc_p.h:43,
                 from /opt/qt5/qtbase/src/plugins/platforms/vnc/main.cpp:42:
/opt/qt5/qtbase/src/plugins/platforms/vnc/qvncscreen.h: At global scope:
/opt/qt5/qtbase/src/plugins/platforms/vnc/qvncscreen.h:76:22: error: expected ‘;’ at end of member declaration
   76 |     bool swapBytes() const
      |                      ^~~~~
      |                           ;
gmake[5]: *** [Makefile:1665: .obj/main.o] Error 1
gmake[5]: Leaving directory '/opt/qt5/qt5-build/qtbase/src/plugins/platforms/vnc'
gmake[4]: *** [Makefile:121: sub-vnc-make_first] Error 2
gmake[4]: Leaving directory '/opt/qt5/qt5-build/qtbase/src/plugins/platforms'
gmake[3]: *** [Makefile:100: sub-platforms-make_first] Error 2
gmake[3]: Leaving directory '/opt/qt5/qt5-build/qtbase/src/plugins'
gmake[2]: *** [Makefile:695: sub-plugins-make_first] Error 2
gmake[2]: Leaving directory '/opt/qt5/qt5-build/qtbase/src'
gmake[1]: *** [Makefile:47: sub-src-make_first] Error 2
gmake[1]: Leaving directory '/opt/qt5/qt5-build/qtbase'
gmake: *** [Makefile:89: module-qtbase-make_first] Error 2
/opt/qt5/qt5-build $

Michele31415

So I gave qvncscreen.h the semicolon it was missing:

#if Q_BYTE_ORDER == Q_BIG_ENDIAN
    bool swapBytes() const ;
#endif

and tried again. Now we get:

g++ -c -g -Wall -W -D_REENTRANT -fPIC -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_PLUGIN -DQT_GUI_LIB -DQT_DBUS_LIB -DQT_CORE_LIB -I/opt/qt5/qtbase/src/plugins/platforminputcontexts/ibus -I. -I../../../../include/QtGui/5.8.0 -I../../../../include/QtGui/5.8.0/QtGui -I../../../../include -I../../../../include/QtGui -I../../../../include/QtDBus -I../../../../include/QtCore/5.8.0 -I../../../../include/QtCore/5.8.0/QtCore -I../../../../include/QtCore -I.moc -I/opt/csw/include -I/usr/openwin/include -I/usr/sfw/include -I/opt/qt5/qtbase/mkspecs/solaris-g++ -o .obj/qibusproxy.o /opt/qt5/qtbase/src/plugins/platforminputcontexts/ibus/qibusproxy.cpp
/opt/qt5/qtbase/src/plugins/platforms/vnc/qvncclient.cpp: In member function ‘void QVncClient::convertPixels(char*, const char*, int) const’:
/opt/qt5/qtbase/src/plugins/platforms/vnc/qvncclient.cpp:145:17: error: ‘swapBytes’ was not declared in this scope; did you mean ‘m_swapBytes’?
  145 |             if (swapBytes)
      |                 ^~~~~~~~~
      |                 m_swapBytes

SGaist

Just add the missing ; and go on with your build.

I don't know why it's not there both the dev and latest 5.15 branch have it.

Michele31415

@SGaist OK, I changed swapBytes to m_swapBytes (which is how it appears everywhere else) and that went away. Now:

88 |     { memcpy(this, &other, sizeof(QTransform)); }
    |                                              ^
../../../../include/QtGui/../../../../qtbase/src/gui/painting/qtransform.h:57:20: note: ‘class QTransform’ declared here
 57 | class Q_GUI_EXPORT QTransform
    |                    ^~~~~~~~~~
/opt/qt5/qtbase/src/plugins/platforms/vnc/qvncclient.cpp: In member function ‘void QVncClient::setPixelFormat()’:
/opt/qt5/qtbase/src/plugins/platforms/vnc/qvncclient.cpp:487:23: error: ‘qvnc_screen’ was not declared in this scope
487 |         m_swapBytes = qvnc_screen->swapBytes();
    |                       ^~~~~~~~~~~
/opt/qt5/qtbase/src/plugins/platforms/vnc/qvncclient.cpp: In member function ‘bool QVncClient::pixelConversionNeeded() const’:
/opt/qt5/qtbase/src/plugins/platforms/vnc/qvncclient.cpp:642:9: error: ‘qvnc_screen’ was not declared in this scope
642 |     if (qvnc_screen->swapBytes())
    |         ^~~~~~~~~~~
/opt/qt5/qtbase/src/plugins/platforms/vnc/qvncscreen.cpp: At global scope:
/opt/qt5/qtbase/src/plugins/platforms/vnc/qvncscreen.cpp:175:6: error: ‘QVNCScreen’ has not been declared
175 | bool QVNCScreen::swapBytes() const
    |      ^~~~~~~~~~
/opt/qt5/qtbase/src/plugins/platforms/vnc/qvncscreen.cpp:175:30: error: non-member function ‘bool swapBytes()’ cannot have cv-qualifier
175 | bool QVNCScreen::swapBytes() const
    |                              ^~~~~
/opt/qt5/qtbase/src/plugins/platforms/vnc/qvncscreen.cpp: In function ‘bool swapBytes()’:
/opt/qt5/qtbase/src/plugins/platforms/vnc/qvncscreen.cpp:177:9: error: ‘depth’ was not declared in this scope
177 |     if (depth() != 16)
    |         ^~~~~
/opt/qt5/qtbase/src/plugins/platforms/vnc/qvncscreen.cpp:180:9: error: ‘screen’ was not declared in this scope; did you mean ‘qGreen’?
180 |     if (screen())
    |         ^~~~~~
    |         qGreen
/opt/qt5/qtbase/src/plugins/platforms/vnc/qvncscreen.cpp:182:12: error: ‘frameBufferLittleEndian’ was not declared in this scope
182 |     return frameBufferLittleEndian();
    |            ^~~~~~~~~~~~~~~~~~~~~~~
gmake[5]: *** [Makefile:2889: .obj/qvncclient.o] Error 1
gmake[5]: *** Waiting for unfinished jobs....

SGaist

Which version of Qt are you building ?

I would have rather added the missing parenthesis in this case.

Michele31415

@SGaist I'm building what

git clone https://code.qt.io/qt/qt5.git

gave me two days ago. Where does it tell you what version you have? Which missing parentheses?
Should this line in qvncscreen.cpp

bool QVNCScreen::swapBytes() const

perhaps be

bool QVncScreen::swapBytes() const

because further up I see

QVncScreen::~QVncScreen()
{
    if (clientCursor)
        delete clientCursor;
}

SGaist

Ok, so you are in fact building the dev branch which is Qt 6. So is that what you want ?

I am currently wondering whether you have something that changed these files. Looking at the sources, I do not see these errors in the vnc plugin.

Michele31415

@SGaist Um, I'm building QT6?? How could that be? My build directory is called:
/opt/qt5/qt5-build $
I'm following directions from https://wiki.qt.io/Building_Qt_5_from_Git Now I'm confused.

SGaist

As I wrote before, the default branch that is checked out when cloning from git is the dev branch and that one is for Qt 6.

You have to explicitly check out the 5.15 branch if you want to build Qt 5.

The repository naming is currently in discussion.