X Library Support (UNIX Systems Only)

Your X Window system needs to support the desired language. The appropriate X libraries must be available on your system.

You can run the following program to find out if the appropriate X libraries are available:

#include <X11/Xlib.h>

#include <stdlib.h>

#include <X11/Xlocale.h>

#include <stdio.h>

 

int

main(int argc, char* argv[])

{

char* loc = setlocale(LC_CTYPE, "");

if (loc == NULL) {

fprintf(stderr, "System does not support this locale.\n");

exit(1);

}

if (!XSupportsLocale()) {

fprintf(stderr, "X does not support locale %s.\n", loc);

exit(1);

}

if (XSetLocaleModifiers("") == NULL) {

fprintf(stderr, "Warning: cannot set locale modifiers for %s.\n", loc);

} else

fprintf(stderr, "Locale %s is supported by Xlib.\n", loc);

exit(0);

}

For example, on an HP system where Arabic is not supported, setting LANG to ar_DZ.arabic8, gives the following output:

X does not support locale ar_DZ.arabic8.