Error: The `brew link` step did not complete successfullyThe formula built, but is not symlinked into /usr/localCould not symlink lib/pkgconfig/QtCLucene.pc/usr/local/lib/pkgconfig is not writable.

You can try again using:  brew link qt

brew link qtLinking /usr/local/Cellar/qt/4.8.7_2... Error: Could not symlink lib/pkgconfig/QtCLucene.pc/usr/local/lib/pkgconfig is not writable.

Warning: /usr/local/lib/pkgconfig isn‘t writable.This can happen if you "sudo make install" software that isn‘t managedby Homebrew. If a formula tries to write a file to this directory, theinstall will fail during the link step.You should probably change the ownership and permissions of /usr/local/lib/pkgconfigback to your user account.  sudo chown -R $(whoami) /usr/local/lib/pkgconfig