QT5 build: CC: No such file or directory

SGaist

I'd go with make distclean but I am not sure, I haven't done any in tree build since over a decade. Always out of source, it allows you to keep your sources clean and start from scratch more easily.

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.