Re: problems compiling lqt under Ubuntu-7.04 Feisty Fawn

[Peter Kümmel <syntheticpp@...>]

Leo Razoumov wrote:
> Hi Mauro and Peter,
> I am trying to build lqt from the git repo master branch (34cbc05a9318)
> under Ubuntu-7.04 Feisty Fawn with Qt-4.2.3 and gcc-4.2.1.
> I tried both methods described in the BUILD file and they did not work 
> for me.
>
> (1) Using cmake, I got the following compile-time errors:
>
> /usr/include/qt4/QtCore/qtextstream.h:233: error: 
> 'QTextStream::QTextStream(const QTextStream&)' is private
> /home/leor/Devel/Lua/lqt.LR.build/qtcore_src/qtcore_head_QTextStream.hpp:19: 
> error: within this context
> /usr/include/qt4/QtCore/qdatastream.h: In constructor 
> 'lqt_shell_QDataStream::lqt_shell_QDataStream(lua_State*, const 
> QDataStream&)':
> /usr/include/qt4/QtCore/qdatastream.h:153: error: 
> 'QDataStream::QDataStream(const QDataStream&)' is private
> /home/leor/Devel/Lua/lqt.LR.build/qtcore_src/qtcore_head_QDataStream.hpp:17: 
> error: within this context
> make[2]: *** 
> [CMakeFiles/qtcore.dir/qtcore_src/qtcore_merged_build.cpp.o] Error 1
> make[1]: *** [CMakeFiles/qtcore.dir/all] Error 2
>
> These errors make sense to me. lqt expects Qt-4.4 and I only have Qt-4.2.3

I only have tested it with 4.4. But I also had these errors on Mac yesterday,
and later they simply disappear, I don't know why. Could you try to compile
qtcore with method 2 and if it compiles figure out way it doesn't compile with
method 1?

> So I decided to recreate lqt bindings using method (2)
>
> (2). I followed the BUILD instructions for the method 2 using 'qmake-qt4'.
>     In Ubuntu-7.04 'qmake' is for Qt-3
>
>
> cd cpptoxml
> qmake-qt4
> make
> cd ..
>
> mkdir ./src
> echo '#include <QtGui>' > ./src/qtgui.cpp
>
> ./cpptoxml/cpptoxml -Q /usr/include/qt4 -C 
> cpptoxml/parser/rpp/pp-qt-configuration ./src/qtgui.cpp > src/qtgui.xml
>
> mkdir qtgui_src
>
> lua generator/generator.lua src/qtgui.xml -i QtGui -i lqt_qt.hpp -n 
> qtgui -t generator/types.lua -t generator/qtypes.lua -f 
> generator/qt_internal.lua
>
> cp common/lqt_*.?pp qtgui_src/
> cd qtgui_src/
> qmake-qt4 -project -template lib -o qtgui.pro
> qmake-qt4 qtgui.pro
> make
>
> I linked libqtgui.so.1.0.0 as qtcore.so, and placed it where require can 
> find it.
>
> When trying to run test/t1.lua got Lua error:
>
> lua: error loading module 'qtcore' from file '/home/leor/Lua/qtcore.so':
>         /home/leor/Lua/qtcore.so: undefined symbol: luaopen_qtcore
>
> After close inspection with "nm -A -C" found out that my qtcore.so
> only defines the following 'luaopen_*' functions
>
>  luaopen_QTextBlockGroup
>  luaopen_QTextFrameLayoutData
>  luaopen_QTextObject
>  luaopen_qtgui
>
> and 'luaopen_qtcore' is not among them.
>
> I guess one needs to export to Lua more than just qtgui bindings. Also 
> renaming libqtgui.so into qtcore.so looks suspicious:-)
>
> Any help and advice are greatly appreciated.

qtgui needs qtcore and qtnetwork, you see the dependencies at the end of
http://repo.or.cz/w/lqt.git?a=blob;f=CMakeLists.txt;

qtgui:
build_qt_lib_binding(QtGui QtNetwork QtCore)

Peter




> Thanks,
> --Leo--