libunistring is starting to be included in many GNU/Linux distributions,
but still most programs using gnulib's unicode modules have a nontrivial
amount of code that could be eliminated if the system libunistring was
used instead.
So maybe we could do the following:
1) change libunistring to define an automake conditional if libunistring
is found;
2) change modules/uni* so that if the conditional is true, then the
modules are left out.
This way, packages that wish to not add another dependency can still
include a statically-linked copy via gnulib, but will rely on the system
library when available.
Paolo
