strcoll ¶POSIX specification:
https://pubs.opengroup.org/onlinepubs/9799919799/functions/strcoll.html
Gnulib module: —
Portability problems fixed by Gnulib:
Portability problems not fixed by Gnulib:
errno to EILSEQ, on Solaris 10, in
UTF-8 locales, when at least one of the strings contains a Unicode character
in a block that was not assigned in Unicode 4.0.