[PyQt] PyQt4: compilation error with sip 4.19.14: convert ‘std::nullptr_t’ to ‘int’ in initialization

[Phil Thompson]

On 18 Feb 2019, at 8:12 pm, Alexei Colin <ac at alexeicolin.com> wrote:
> 
> Hi, build of PyQt4 fails with sip 4.19.14:
> 
>    g++ -c -pipe -fno-exceptions -march=x86-64 -mtune=generic -O2 -pipe
>    -fstack-protector-strong -fno-plt -Wall -W -D_REENTRANT -fPIC
>    -DSIP_PROTECTED_IS_PUBLIC -Dprotected=public -DQT_NO_DEBUG -DQT_PLUGIN
>    -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I.
>    -I/usr/include/qt4/QtCore -I/usr/include/qt4 -I.
>    -I/usr/include/python3.7m -I../qpy/QtCore -I. -o
>    sipQtCoreQAbstractTransition.o sipQtCoreQAbstractTransition.cpp
>    /home/col/.cache/pikaur/build/pyqt4/src/PyQt4_gpl_x11-4.12.3/QtCore/sipQtCoreQAbstractTransition.cpp:812:1:
>    error: cannot convert ‘std::nullptr_t’ to ‘int’ in initialization
> 
> This is on Arch Linux, gcc 8.2.1, sip.h from sip 4.19.14.
> 
> This ugly workaround to edit the generated code gets rid of the error:
> 
>    find . -type f -name '*.cpp' -exec sed -i 's/{SIP_NULLPTR, SIP_NULLPTR, SIP_NULLPTR, SIP_NULLPTR}/{SIP_NULLPTR, SIP_NULLPTR, SIP_NULLPTR, 0}/g' {} \;
> 
> Possibly related:
> 
> http://python.6.x6.nabble.com/PATCH-1-5-Add-SIP-NULLPTR-SIP-OVERRIDE-compatibility-macros-td5240856.html
> 
> Just reporting so that this may be fixed in the next release. Thanks.

Should be fixed (but untested) with tonight's sip snapshot.

Thanks,
Phil