@section @code{lockf}
@findex lockf
-POSIX specification: @url{http://www.opengroup.org/susv3xsh/lockf.html}
+POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/lockf.html}
Gnulib module: ---
@itemize
@item
This function is missing on some platforms:
-Cygwin, mingw, BeOS.
+Minix 3.1.8, Cygwin 1.5.x, mingw, MSVC 9, BeOS.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly across the entire data range of files larger than 2 GB.
+The fix is to use the @code{AC_SYS_LARGEFILE} macro.
@end itemize