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idn2_check_version(3) libidn2 idn2_check_version(3)


idn2_check_version - API function


#include <idn2.h>

const char * idn2_check_version(const char * req_version);


version string to compare with, or NULL.


Check IDN2 library version. This function can also be used to read out the version of the library code used. See IDN2_VERSION for a suitable req_version string, it corresponds to the idn2.h header file version. Normally these two version numbers match, but if you are using an application built against an older libidn2 with a newer libidn2 shared library they will be different.

Return value: Check that the version of the library is at minimum the one given as a string in req_version and return the actual version string of the library; return NULL if the condition is not met. If NULL is passed to this function no check is done and only the version string is returned.


Report bugs to <>.
General guidelines for reporting bugs:
Libidn2 home page:


Copyright © 2002-2024 Simon Josefsson.
Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.


The full documentation for libidn2 is maintained as a Texinfo manual. If the info and libidn2 programs are properly installed at your site, the command

info libidn2

should give you access to the complete manual. As an alternative you may obtain the manual from:
2.3.7 libidn2