wcscoll.c

// a simple hack to check if wcscoll(P) really does locale-sensitive collation
#include<wchar.h>
#include<stdio.h>
#include<locale.h>
int main(int argc, char **argv) {
    setlocale(LC_ALL, argv[1]);
    printf("%d\n", wcscoll(L"z", L"ö"));
    return 0;
}
/*
$ gcc wcscoll.c
$ ./a.out sv_SE.UTF-8
-3
$ ./a.out de_DE.UTF-8
11
$
*/