Install with Qt 5.12.1: Cannot convert QJsonArray::iterator

[AntonioFasano]

In Arch Linux Qt 5.12.1, setup fails with the following error

> install_github("ggobi/qtbase")
...

[ 52%] Building CXX object kdebindings/smoke/qt/CMakeFiles/smokeqt.dir/x_8.cpp.o
/tmp/RtmpxVOX0Z/R.INSTALL10026c8251da/qtbase/src-build/kdebindings/smoke/qt/x_8.cpp: In member function ‘void __smokeqt::x_QJsonArray::x_25(Smoke::Stack)’:
/tmp/RtmpxVOX0Z/R.INSTALL10026c8251da/qtbase/src-build/kdebindings/smoke/qt/x_8.cpp:4940:53: error: cannot convert ‘QJsonArray::iterator’ to ‘const QChar*’ in initialization
         const QChar* xret = this->QJsonArray::begin();
...

Thanks for any support.

[lawremi]

Thanks. It will take a while to update support to 5.12. Every release they find new ways to confuse our compiler. I think in this case we need to ignore typedefs within classes.

[AntonioFasano]

Thank you. Please, which is the last supported Qt version.

As I understand, it is quite unlikely to install the package with rolling distros. One possibility could be to download and build from source:

https://download.qt.io/archive/qt/5.12/5.12.1/submodules/qtbase-everywhere-src-5.12.1.tar.xz

where 5.12.1 is replaced with the last supported version.

Then:

export QTDIR="/path/to/new/qt/"
export PATH="${QTDIR}/bin:${PATH}"
export LD_LIBRARY_PATH="${QTDIR}/lib"
export CMAKE_PREFIX_PATH="${QTDIR}"
export PKG_CONFIG_PATH="${QTDIR}/lib/pkgconfig"
R
install_github("ggobi/qtbase")

What do you think?

[lawremi]

Something like that should work. Not sure how cmake finds Qt5, but it should be documented. I pushed some changes yesterday that get us pretty close, but there are a couple more issues.

[leovan]

I got some other errors on macOS when compiling against R 3.5.2 and Qt 5.12.1, really hope it can support the latest Qt 5.12.* soon.

Generating SMOKE sources...
preparing SMOKE data [qt]
writing out smokedata.cpp [qt]
writing out x_*.cpp [qt]
Done.
[ 45%] Automatic MOC for target smokeqt
[ 45%] Built target smokeqt_autogen
Scanning dependencies of target smokeqt
[ 46%] Building CXX object kdebindings/smoke/qt/CMakeFiles/smokeqt.dir/smokedata.cpp.o
/private/var/folders/w0/tsvfs60x117d_vcxs0jhhsv00000gn/T/Rtmp9hb2Rs/R.INSTALL130de2433b2eb/qtbase/src-build/kdebindings/smoke/qt/smokedata.cpp:10362:35: error: 
      use of undeclared identifier 'RegisterType'; did you mean 'QMetaType::registerType'?
        case 1390: return (void*)(RegisterType*)xptr;
                                  ^~~~~~~~~~~~
                                  QMetaType::registerType
/usr/local/opt/qt/lib/QtCore.framework/Headers/qmetatype.h:511:16: note: 'QMetaType::registerType' declared here
    static int registerType(const char *typeName, Deleter deleter,
               ^
/private/var/folders/w0/tsvfs60x117d_vcxs0jhhsv00000gn/T/Rtmp9hb2Rs/R.INSTALL130de2433b2eb/qtbase/src-build/kdebindings/smoke/qt/smokedata.cpp:10362:48: error: 
      expected expression
        case 1390: return (void*)(RegisterType*)xptr;
                                               ^

[ryellow]

@leovan I've got exactly the same error. Qt 5.12.8 and R 3.6.3
@lawremi I hope you can support soon the latest Qt 5.12*

[ryellow]

@AntonioFasano : On MacOS, R3.6.3, I am able to compile and install qtbase with Qt 5.9.9. It seems work as expected. With Qt 5.12.8 the compilation fails. I Hope this help you