freebsd: fix the 'df' command

df, and perhaps other commands, get the list of the mounted filesystems
with the call to getmntinfo(3).  Since Rust still use FreeBSD 11.x ABI
for filesystem metadata call, it should use matching versioned symbol for
getmntinfo from libc.

src/uucore/src/lib/features/fsext.rs

@@ -362,13 +362,19 @@ extern "C" {
  fn get_mount_info(mount_buffer_p: *mut *mut StatFs, flags: c_int) -> c_int;
 
  #[cfg(any(
- target_os = "freebsd",
  target_os = "netbsd",
  target_os = "openbsd",
  all(target_vendor = "apple", target_arch = "aarch64")
  ))]
  #[link_name = "getmntinfo"] // spell-checker:disable-line
  fn get_mount_info(mount_buffer_p: *mut *mut StatFs, flags: c_int) -> c_int;
+
+ // Rust on FreeBSD uses 11.x ABI for filesystem metadata syscalls.
+ // Call right version of the symbol for getmntinfo result to match
+ // libc StatFS layout.
+ #[cfg(target_os = "freebsd")]
+ #[link_name = "getmntinfo@FBSD_1.0"] // spell-checker:disable-line
+ fn get_mount_info(mount_buffer_p: *mut *mut StatFs, flags: c_int) -> c_int;
 }
 
 #[cfg(any(target_os = "linux", target_os = "android"))]