Solve this Error please

rOOt_Qt

while executing the query in Putty
pi@raspberrypi ~/opt/qt5 $ ./configure -v -opengl es2 -device linux-rasp-pi-g''+ -device-option CROSS_COMPILE=/usr/bin/ -opensource

cd qtbase
/home/pi/opt/qt5/qtbase/configure -top-level -v -opengl es2 -device linux-rasp-pi-g+ -device-option CROSS_COMPILE=/usr/bin/ -opensource
./configure: 49: exec: /home/pi/opt/qt5/qtbase/configure: not found

jsulm

Does /home/pi/opt/qt5/qtbase/configure exist?
If you're already in /home/pi/opt/qt5/qtbase you can just call "./configure -top-level -v -opengl es2 -device linux-rasp-pi-g+ -device-option CROSS_COMPILE=/usr/bin/ -opensource"