doc: Mention the effects of AC_SYS_LARGEFILE.

[gnulib.git] / doc / posix-functions / telldir.texi

diff --git a/doc/posix-functions/telldir.texi b/doc/posix-functions/telldir.texi
index 6094218..88b1908 100644 (file)
--- a/doc/posix-functions/telldir.texi
+++ b/doc/posix-functions/telldir.texi
@@ -15,4 +15,8 @@ Portability problems not fixed by Gnulib:
 @item
 This function is missing on some platforms:
 BeOS.
+@item
+On platforms where @code{long int} is a 32-bit type, this function may not
+work correctly on huge directories larger than 2 GB.  The fix is to use
+the @code{AC_SYS_LARGEFILE} macro (only on MacOS X systems).
 @end itemize