NetBSD 3.0, AIX 5.1, HP-UX 11.23, IRIX 6.5, OSF/1 5.1, Solaris 9,
Cygwin 1.5.x, mingw, BeOS.
@item
+This function does not support the @samp{ls} directive on some platforms:
+OpenBSD 4.0, IRIX 6.5, Solaris 2.6, Cygwin 1.5.x, Haiku.
+@item
+This function does not support precisions in the @samp{ls} directive correctly
+on some platforms:
+Solaris 10.
+@item
This function does not support format directives that access arguments in an
arbitrary order, such as @code{"%2$s"}, on some platforms:
NetBSD 3.0, mingw, BeOS.