1@subheading idn2_check_version 2@anchor{idn2_check_version} 3@deftypefun {const char *} {idn2_check_version} (const char * @var{req_version}) 4@var{req_version}: version string to compare with, or NULL. 5 6Check IDN2 library version. This function can also be used to read 7out the version of the library code used. See @code{IDN2_VERSION} for a 8suitable @code{req_version} string, it corresponds to the idn2.h header 9file version. Normally these two version numbers match, but if you 10are using an application built against an older libidn2 with a 11newer libidn2 shared library they will be different. 12 13Return value: Check that the version of the library is at 14minimum the one given as a string in @code{req_version} and return the 15actual version string of the library; return NULL if the 16condition is not met. If NULL is passed to this function no 17check is done and only the version string is returned. 18@end deftypefun 19 20