make install should write .pc files to /opt/ncurses and not /usr/share/pkgconfig

Hi:

towards the end of 'make install' of ncurses the following line(s) are seen.

finished install.data
/usr/bin/install -c ncurses-config /opt/ncurses/bin/ncurses6-config
installing ncurses.pc
/usr/bin/install: cannot create regular file '/usr/share/pkgconfig/ncurses.pc': Permission denied
installing tinfo.pc
/usr/bin/install: cannot create regular file '/usr/share/pkgconfig/tinfo.pc': Permission denied
installing tic.pc
/usr/bin/install: cannot create regular file '/usr/share/pkgconfig/tic.pc': Permission denied
installing panel.pc
/usr/bin/install: cannot create regular file '/usr/share/pkgconfig/panel.pc': Permission denied
installing menu.pc
/usr/bin/install: cannot create regular file '/usr/share/pkgconfig/menu.pc': Permission denied
installing form.pc
/usr/bin/install: cannot create regular file '/usr/share/pkgconfig/form.pc': Permission denied

What option do i specify to 'configure' script to so that all .pc (pkgconfig) files are written to '/opt/ncurses/share/pkgconfig' ?

warm regards
Saifi.