The following packages should be installed before GNU libunistring is installed: * GNU libiconv + Not needed on systems with - glibc 2.2 or newer, or - MacOS X 10.3 or newer, or - NetBSD 3.0 or newer. But highly recommended on all other systems. Needed for character set conversion of strings from/to Unicode. + Homepage: https://www.gnu.org/software/libiconv/ + Download: https://ftp.gnu.org/gnu/libiconv/ + If it is installed in a nonstandard directory, pass the option --with-libiconv-prefix=DIR to 'configure'.