Hello.I am tottaly new in qwt and i want to install the qwt libraries on my Mac OS Leopard 10.5.6.I run all the commands as i see in the INSTALL file but when i try to run the "make install" command i have the following errors.

cd src/ && make -f Makefile install
mkdir: /usr/local/qwt-5.2.0: Permission denied
make[1]: *** [install_target] Error 1
make: *** [sub-src-install_subtargets] Error 2


I am a sudo user.Can anyone tell me how to install them?Thanks in advance