Constant libc::LC_COLLATE
pub const LC_COLLATE: ::c_int = 3;
The portability is definied by:
#[cfg(all(not(target_env = "uclibc"), not(any())))]
pub const LC_COLLATE: ::c_int = 3;
#[cfg(all(not(target_env = "uclibc"), not(any())))]