MAC下 brew link qt 出现的一些问题

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

You can try again using:
brew link qt

brew link qt
Linking /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 managed
by Homebrew. If a formula tries to write a file to this directory, the
install will fail during the link step.

You should probably change the ownership and permissions of /usr/local/lib/pkgconfig
back to your user account.
sudo chown -R $(whoami) /usr/local/lib/pkgconfig