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Text files are nowadays usually encoded in Unicode, and may consist of very different scripts - from Latin letters to Chinese Hanzi, with many kinds of special characters: accents, right-to-left writing marks, hyphens, Roman numbers, and much more. But the POSIX platform APIs for text do not contain adequate functions for dealing with particular properties of many Unicode characters. In fact, the POSIX APIs for text have several assumptions at their base which don’t hold for Unicode text.

This library provides functions for manipulating Unicode strings and for manipulating C strings according to the Unicode standard.


To make the library available, run one of the following:

module load libunistring/0.9.10-foss-2019b
module load libunistring/0.9.10-GCCcore-10.3.0
module load libunistring/1.0-GCCcore-11.3.0

This correctly populates the environment variables LD_LIBRARY_PATH, LIBRARY_PATH and CPATH.

Installation Notes

This section is primarily for administrators of the system.

Libunistring was installed using Easybuild 4.7.0, build details can be found in $EBROOTGMP/easybuild with the module loaded.


Test done through importing the headers to a c file and compiling

#include <unistr.h>
#include <unictype.h>
#include <uninorm.h>
#include <unicase.h>
int main(void)
    printf("The libunistring libraries exist ");