Enable ICU (Internationalization Components for Unicode) support, using dev-libs/icu

Packages describing “icu” as local USE flag

Package “icu” Flag Description
dev-haskell/citeproc Use Haskell bindings to the ICU library
x11-libs/vte Enable legacy charset support using dev-libs/icu
app-text/msort Use dev-libs/icu instead of dev-libs/libutf8proc.

All packages providing a “icu” USE flag (23)