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List:       pykde
Subject:    Re: Install old version PyQt4 on a mac by compiling the source
From:       Felix Voigt <info () felibunda ! eu>
Date:       2021-07-14 5:39:02
Message-ID: 54EC2CFF-F477-476C-8A18-A21983309BF8 () felibunda ! eu
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> On 13. Jul 2021, at 23:01, Phil Thompson <phil@riverbankcomputing.com> wrote:
> 
> On 13/07/2021 21:39, Felix Voigt wrote:
> > > On 10. Jul 2021, at 12:29, Phil Thompson <phil@riverbankcomputing.com> wrote:
> > > On 10/07/2021 11:16, Felix Voigt wrote:
> > > > > On 9. Jul 2021, at 10:09, Phil Thompson <phil@riverbankcomputing.com> \
> > > > > wrote: On 08/07/2021 19:37, Felix Voigt wrote:
> > > > > > Hello everyone,
> > > > > > today I tried the same with PyQt5 with the following results.
> > > > > > The configure process succeeded:
> > > > > > cd ~/documents/tmp/PyQt5-5.15.4
> > > > > > ~/.pyenv/versions/2.7.18/bin/python2.7 configure.py --qmake
> > > > > > /usr/local/Cellar/qt@5/5.15.2/bin/qmake
> > > > > > --sip=/Users/felixvoigt/.pyenv/versions/2.7.18/bin/sip --verbose
> > > > > > The make process failed:
> > > > > > make
> > > > > > -> In file included from
> > > > > > /Users/felixvoigt/documents/tmp/PyQt5-5.15.4/sip/QtCore/qsocketnotifier.sip:26:
> > > > > >                 
> > > > > > /usr/local/Cellar/qt@5/5.15.2/lib/QtCore.framework/Headers/qsocketnotifier.h:117:35:
> > > > > >                 
> > > > > > error: constexpr function never produces a constant
> > > > > > expression [-Winvalid-constexpr]
> > > > > > Q_DECL_CONSTEXPR_NOT_WIN bool isValid() const noexcept { return
> > > > > > *this != QSocketDescriptor(); }
> > > > > > ^
> > > > > > /usr/local/Cellar/qt@5/5.15.2/lib/QtCore.framework/Headers/qsocketnotifier.h:117:75:
> > > > > >                 
> > > > > > note: undefined function 'operator!=' cannot be used
> > > > > > in a constant expression
> > > > > > Q_DECL_CONSTEXPR_NOT_WIN bool isValid() const noexcept { return
> > > > > > *this != QSocketDescriptor(); }
> > > > > > ^
> > > > > > /usr/local/Cellar/qt@5/5.15.2/lib/QtCore.framework/Headers/qsocketnotifier.h:124:42:
> > > > > >                 
> > > > > > note: declared here
> > > > > > friend Q_DECL_CONSTEXPR_NOT_WIN bool operator!=(QSocketDescriptor lhs,
> > > > > > 1 error generated.
> > > > > > Any ideas how to fix it?
> > > > > > Kind regards
> > > > > > feli_x
> > > > > As the error is referring to Qt source code and not SIP generated code then \
> > > > > the problem may be your version of Xcode. Phil
> > > > Hello Phil and thanks,
> > > > meanwhile I updated my xcode from beta 9.0 to 11.3.1.
> > > > I managed to configure pyqt5 via:
> > > > ~/.pyenv/versions/2.7.18/bin/python2.7 configure.py --qmake
> > > > /usr/local/Cellar/qt@5/5.15.2/bin/qmake
> > > > --sip=/Users/felixvoigt/.pyenv/versions/2.7.18/bin/sip —verbose
> > > > Although there was a warning, which I neglected:
> > > > Project WARNING: Qt requires at least version 10.14 of the platform
> > > > SDK, you're building against version 10.13. Please upgrade.
> > > > The make process succeeded, there were also many warnings, which are
> > > > too many to store them I thought.
> > > > Finally:
> > > > make install
> > > > Now, my next problem is, if I start the python program, the line "from
> > > > PyQt5 import QtCore, QtGui" gives an error message:
> > > > ~/.pyenv/versions/2.7.18/bin/python2.7 test.py
> > > > Traceback (most recent call last):
> > > > File "test.py", line 1, in <module>
> > > > from PyQt5 import QtCore, QtGui
> > > > ImportError: No module named sip
> > > > I tried including the folder
> > > > /Users/felixvoigt/.pyenv/versions/2.7.18/bin in my PATH, which was not
> > > > a solution.
> > > > Does somebody know how to configure sip correctly such that it can be
> > > > found by pyqt5?
> > > https://www.riverbankcomputing.com/static/Docs/PyQt5/installation.html#building-the-sip-module
> > >  Phil
> > Hello again,
> > thanks for the answer.
> > If I take the PyQt5_sip-12.9.0.tar.gz version downloaded from
> > https://pypi.org/project/PyQt5-sip/#files, I obtain the following:
> > After the commands
> > cd ~/documents/tmp/PyQt5_sip-12.9.0
> > ~/.pyenv/versions/2.7.18/bin/python2.7 setup.py  build
> > the following error results:
> > In file included from ./sipint.h:26:
> > ./sip.h:28:2: error: "This version of SIP requires Python v3.5 or later"
> > #error "This version of SIP requires Python v3.5 or later"
> > Is there a version of PyQt5_sip which is applicable to python2.7? And
> > by the way, do I need sip or PyQt5_sip, and what is the difference?
> > Sorry for many questions,
> > best regards
> 
> My apologies (Python v2 is no longer supported), you probably need to use SIP v4 \
> (also no longer supported) which you can find here... 
> https://www.riverbankcomputing.com/software/sip/download
> 
> Phil

Dear Phil,

thanks. I already had compile sip4.19.25, but PyQt5.15.4 did not find the module.
On the site http://python.6.x6.nabble.com/private-sip-td5235854.html I found the \
solution. I have to configure sip with the option --sip-module=PyQt5.sip. In my case \
this was: Erase the folder sip-4.19.25 and extract it freshly from \
sip-4.19.25.tar.gz. cd ~/documents/tmp/sip-4.19.25
~/.pyenv/versions/2.7.18/bin/python2.7 configure.py --sip-module=PyQt5.sip
make
make install

Now my test program does not give any error messages! Thanks again
feli_x


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