wrapper in C for QT

[YuriyRusinov]

Hello, All !

I develop wrappers in C for C++ library, which was make with QT class library. Which way I have to include header files from QT into my .c file
e.g.

search.c
 
#include <QObject>

search.c

#include <QObject>

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If I try to make project using qmake utility and in pro file write

QT += core

QT += core

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then I receive many error messages such this

gcc -c -pipe -g -Wall -W -D_REENTRANT -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtGui -I/usr/include/qt4 -I/opt/xgis/include/xgis -I/opt/gdal/include -I. -I. -o search.o search.c
In file included from /usr/include/qt4/QtCore/qobjectdefs.h:42,
from /usr/include/qt4/QtCore/qobject.h:44,
from /usr/include/qt4/QtCore/QObject:1,
from /opt/xgis/include/xgis/searchengine.h:9,
from search.c:1:
/usr/include/qt4/QtCore/qnamespace.h:46: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘QT_MODULE’
/usr/include/qt4/QtCore/qnamespace.h:1424: error: expected ‘)’ before ‘:’ token
/usr/include/qt4/QtCore/qnamespace.h:1440: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘Q_CORE_EXPORT’

[ChristianEhrlicher]

You're funny - you include a c++ header in a c file, compile this with a c - compiler instead a c++ one and then you wonder why you get errors?

[YuriyRusinov]

Thanks

I understand my error therefore I'll write 2 files cpl_searchengine.h and cpl_searchengine.cpp, may I use C++ methods in realization ?

[ChristianEhrlicher]

Yes, this should work and imho you have no other chance

[YuriyRusinov]

Thanks a lot, all works fine.