Builiding Error

while trying build Qt 4.4.3 i am getting this error ...how to solve this help me out....
./configure successfully configured

make (while invoking make i got this error after 2 hours of compilation process)

(test -z "" || cd "" ; targ=`basename browser`; objcopy --only-keep-debug "$targ" "$targ.debug" && objcopy --strip-debug "$targ" && objcopy --add-gnu-debuglink="$targ.debug" "$targ" && chmod -x "$targ.debug" ) ;
make[2]: Leaving directory `/home/ashwin/Documents/qt-x11-opensource-src-4.4.3/demos/browser'
make[1]: Leaving directory `/home/ashwin/Documents/qt-x11-opensource-src-4.4.3/demos'
cd tools/qdoc3/ && make -f Makefile
make[1]: Entering directory `/home/ashwin/Documents/qt-x11-opensource-src-4.4.3/tools/qdoc3'
/home/ashwin/Documents/qt-x11-opensource-src-4.4.3/bin/qmake -spec ../../mkspecs/linux-g++ -unix -o Makefile qdoc3.pro
make[1]: Leaving directory `/home/ashwin/Documents/qt-x11-opensource-src-4.4.3/tools/qdoc3'
make[1]: Entering directory `/home/ashwin/Documents/qt-x11-opensource-src-4.4.3/tools/qdoc3'