Regarding gcc compile

[Goswami, Abhishek]

Hi,
I have download qt framework and run the configure command. I am getting following error. I tried to search into google but not able to find the solution of this issue.

g++ -c -o project.o -m64 -pipe -DQMAKE_OPENSOURCE_EDITION -I. -Igenerators -Igenerators/unix -Igenerators/win32 -Igenerators/mac -I/tmp/qt-x11-opensource-src-4.2.3/src/corelib/arch/generic -I/tmp/qt-x11-opensource-src-4.2.3/include -I/tmp/qt-x11-opensource-src-4.2.3/include/QtCore -I/tmp/qt-x11-opensource-src-4.2.3/include -I/tmp/qt-x11-opensource-src-4.2.3/include/QtCore -I/tmp/qt-x11-opensource-src-4.2.3/src/corelib/global -I/tmp/qt-x11-opensource-src-4.2.3/src/3rdparty/md5 -DQT_NO_TEXTCODEC -DQT_NO_UNICODETABLES -DQT_NO_COMPONENT -DQT_NO_STL -DQT_BUILD_QMAKE -DQT_NO_COMPRESS -I/tmp/qt-x11-opensource-src-4.2.3/mkspecs/linux-g++-64 -DHAVE_QCONFIG_CPP -DQT_NO_THREAD -DQT_NO_QOBJECT -DQT_NO_GEOM_VARIANT  project.cpp
project.cpp:1: sorry, unimplemented: 64-bit mode not compiled in
gmake: *** [project.o] Error 1


Does anyone provide me any input in this issue?.

Machine info:
Linux <Machine name>   x86_64 x86_64 x86_64 GNU/Linux