# grep cairo /etc/portage/package.use
x11-libs/cairo pdf
# emerge -pvk cairo
These are the packages that would be merged, in order:
Calculating dependencies... done!
[binary R ] x11-libs/cairo-1.2.4 USE="X png svg -directfb -doc -glitz -pdf"
Total size of downloads: 0 kB
# USE="pdf" emerge -pvk cairo
These are the packages that would be merged, in order:
Calculating dependencies... done!
[binary R ] x11-libs/cairo-1.2.4 USE="X png svg -directfb -doc -glitz -pdf"
Total size of downloads: 0 kB