hi all,
i reinstalled Qt with option -opengl but in the end of ./configure -prefix-install - opengl it gave as :
...
rm -f libQtSvg.so.4.2.2 libQtSvg.so libQtSvg.so.4 libQtSvg.so.4.2
g++ -Wl,-rpath,/usr/local/Trolltech/Qt-4.2.2/lib -Wl,-rpath,/usr/local/Trolltech/Qt-4.2.2/lib -shared -Wl,-soname,libQtSvg.so.4 -o libQtSvg.so.4.2.2 .obj/release-shared/qsvggraphics.o .obj/release-shared/qsvghandler.o .obj/release-shared/qsvgnode.o .obj/release-shared/qsvgstructure.o .obj/release-shared/qsvgstyle.o .obj/release-shared/qsvgfont.o .obj/release-shared/qsvgtinydocument.o .obj/release-shared/qsvgrenderer.o .obj/release-shared/qsvgwidget.o .obj/release-shared/qgraphicssvgitem.o .obj/release-shared/moc_qsvgwidget.o -L/usr/local/Trolltech/Qt-4.2.2/lib -lQtXml -L/usr/local/Trolltech/Qt-4.2.2/lib -lQtGui -L/usr/X11R6/lib -lpng -lSM -lICE -lXrender -lXrandr -lXcursor -lXinerama -lfreetype -lfontconfig -lXext -lX11 -lQtCore -lz -lm -lglib-2.0 -lpthread -ldl
ln -s libQtSvg.so.4.2.2 libQtSvg.so
ln -s libQtSvg.so.4.2.2 libQtSvg.so.4
ln -s libQtSvg.so.4.2.2 libQtSvg.so.4.2
rm -f ../../lib/libQtSvg.so.4.2.2
rm -f ../../lib/libQtSvg.so
rm -f ../../lib/libQtSvg.so.4
rm -f ../../lib/libQtSvg.so.4.2
mv -f libQtSvg.so.4.2.2 libQtSvg.so libQtSvg.so.4 libQtSvg.so.4.2 ../../lib/
(test -z "../../lib/" || cd "../../lib/" ; targ=`basename libQtSvg.so.4.2.2`; objcopy --only-keep-debug "$targ" "$targ.debug" && objcopy --strip-debug "$targ" && objcopy --add-gnu-debuglink="$targ.debug" "$targ" && chmod -x "$targ.debug" ) ;
gmake[2]: Leaving directory `/usr/local/Trolltech/Qt-4.2.2/src/svg'
cd opengl && gmake -f Makefile
gmake[2]: Entering directory `/usr/local/Trolltech/Qt-4.2.2/src/opengl'
/usr/local/Trolltech/Qt-4.2.2/bin/qmake -spec ../../mkspecs/linux-g++ -unix -o Makefile opengl.pro
gmake[2]: Leaving directory `/usr/local/Trolltech/Qt-4.2.2/src/opengl'
gmake[2]: Entering directory `/usr/local/Trolltech/Qt-4.2.2/src/opengl'
g++ -c -pipe -g -O2 -fvisibility=hidden -fvisibility-inlines-hidden -Wall -W -D_REENTRANT -fPIC -DQT_SHARED -DQT_BUILD_OPENGL_LIB -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT3_SUPPORT -DQT_MOC_COMPAT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -I../../mkspecs/linux-g++ -I. -I../../include/QtCore -I../../include/QtCore -I../../include/QtGui -I../../include/QtGui -I../../include -I../../include/QtOpenGL -I/usr/include/freetype2 -I/usr/X11R6/include -I/usr/X11R6/include -I.moc/release-shared -I.uic/release-shared -o .obj/release-shared/qgl.o qgl.cpp
In file included from qgl.cpp:26:
qgl.h:60:21: error: GL/glu.h: No such file or directory
../../include/QtCore/../../src/corelib/thread/qthreadstorage.h: In static member function ‘static void QThreadStorage<T>::deleteData(void*) [with T = QGLThreadContext*]’:
../../include/QtCore/../../src/corelib/thread/qthreadstorage.h:116: instantiated from ‘QThreadStorage<T>::QThreadStorage() [with T = QGLThreadContext*]’
qgl.cpp:39: instantiated from here
../../include/QtCore/../../src/corelib/thread/qthreadstorage.h:113: warning: dereferencing type-punned pointer will break strict-aliasing rules
gmake[2]: *** [.obj/release-shared/qgl.o] Error 1
gmake[2]: Leaving directory `/usr/local/Trolltech/Qt-4.2.2/src/opengl'
gmake[1]: *** [sub-opengl-make_default] Error 2
gmake[1]: Leaving directory `/usr/local/Trolltech/Qt-4.2.2/src'
gmake: *** [sub-src-make_default-ordered] Error 2
[root@localhost Qt-4.2.2]#

so after tht i did gmake and set QMAKESPEC
no when i try to run my same program with opengl as:
qmake -project
added QT += opengl in .pro file
qmake
make [or gmake]
its giving the error as
[root@localhost 2and3D]# make
g++ -c -pipe -O2 -Wall -W -D_REENTRANT -DQT_NO_DEBUG -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/local/Trolltech/Qt-4.2.2/mkspecs/linux-g++ -I. -I/usr/local/Trolltech/Qt-4.2.2/include/QtCore -I/usr/local/Trolltech/Qt-4.2.2/include/QtCore -I/usr/local/Trolltech/Qt-4.2.2/include/QtGui -I/usr/local/Trolltech/Qt-4.2.2/include/QtGui -I/usr/local/Trolltech/Qt-4.2.2/include/QtOpenGL -I/usr/local/Trolltech/Qt-4.2.2/include/QtOpenGL -I/usr/local/Trolltech/Qt-4.2.2/include -I. -I/usr/X11R6/include -I. -I. -o form.o form.cpp
In file included from /usr/local/Trolltech/Qt-4.2.2/include/QtOpenGL/qgl.h:1,
from /usr/local/Trolltech/Qt-4.2.2/include/QtOpenGL/QGLWidget:1,
from glwidget.h:5,
from form.h:5,
from form.cpp:2:
/usr/local/Trolltech/Qt-4.2.2/include/QtOpenGL/../../src/opengl/qgl.h:60:21: error: GL/glu.h: No such file or directory
make: *** [form.o] Error 1
[root@localhost 2and3D]#
there is no "glu.h" file on my system

So i think that opengl is not installed. so can u help me that how can i install with opengl?
Thanks All..