--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,57 @@
+2011-07-24  Bruno Haible  <bruno@clisp.org>
+
+	doc: Mention the effects of AC_SYS_LARGEFILE.
+	* doc/posix-functions/aio_cancel.texi: Mention the effects of AC_SYS_LARGEFILE
+	on this function.
+	* doc/posix-functions/aio_error.texi: Likewise.
+	* doc/posix-functions/aio_fsync.texi: Likewise.
+	* doc/posix-functions/aio_read.texi: Likewise.
+	* doc/posix-functions/aio_return.texi: Likewise.
+	* doc/posix-functions/aio_suspend.texi: Likewise.
+	* doc/posix-functions/aio_write.texi: Likewise.
+	* doc/posix-functions/fgetpos.texi: Likewise.
+	* doc/posix-functions/fopen.texi: Likewise.
+	* doc/posix-functions/freopen.texi: Likewise.
+	* doc/posix-functions/fsetpos.texi: Likewise.
+	* doc/posix-functions/fstatvfs.texi: Likewise.
+	* doc/posix-functions/ftruncate.texi: Likewise.
+	* doc/posix-functions/ftw.texi: Likewise.
+	* doc/posix-functions/getrlimit.texi: Likewise.
+	* doc/posix-functions/glob.texi: Likewise.
+	* doc/posix-functions/lio_listio.texi: Likewise.
+	* doc/posix-functions/lockf.texi: Likewise.
+	* doc/posix-functions/mkstemp.texi: Likewise.
+	* doc/posix-functions/mmap.texi: Likewise.
+	* doc/posix-functions/nftw.texi: Likewise.
+	* doc/posix-functions/openat.texi: Likewise.
+	* doc/posix-functions/opendir.texi: Likewise.
+	* doc/posix-functions/posix_fadvise.texi: Likewise.
+	* doc/posix-functions/posix_fallocate.texi: Likewise.
+	* doc/posix-functions/pread.texi: Likewise.
+	* doc/posix-functions/pwrite.texi: Likewise.
+	* doc/posix-functions/readdir.texi: Likewise.
+	* doc/posix-functions/readdir_r.texi: Likewise.
+	* doc/posix-functions/rewinddir.texi: Likewise.
+	* doc/posix-functions/scandir.texi: Likewise.
+	* doc/posix-functions/seekdir.texi: Likewise.
+	* doc/posix-functions/setrlimit.texi: Likewise.
+	* doc/posix-functions/statvfs.texi: Likewise.
+	* doc/posix-functions/telldir.texi: Likewise.
+	* doc/posix-functions/tmpfile.texi: Likewise.
+	* doc/posix-functions/truncate.texi: Likewise.
+	* doc/glibc-functions/fallocate.texi: Likewise.
+	* doc/glibc-functions/fstatfs.texi: Likewise.
+	* doc/glibc-functions/fts_children.texi: Likewise.
+	* doc/glibc-functions/fts_read.texi: Likewise.
+	* doc/glibc-functions/getdirentries.texi: Likewise.
+	* doc/glibc-functions/mkostemp.texi: Likewise.
+	* doc/glibc-functions/mkostemps.texi: Likewise.
+	* doc/glibc-functions/mkstemps.texi: Likewise.
+	* doc/glibc-functions/preadv.texi: Likewise.
+	* doc/glibc-functions/pwritev.texi: Likewise.
+	* doc/glibc-functions/sendfile.texi: Likewise.
+	* doc/glibc-functions/statfs.texi: Likewise.
+
 2011-07-24  Bruno Haible  <bruno@clisp.org>
 
 	doc: Fix typo.

--- a/doc/glibc-functions/fallocate.texi
+++ b/doc/glibc-functions/fallocate.texi
@@ -13,4 +13,8 @@
 @item
 This function is missing on older glibc versions and all non-glibc platforms:
 MacOS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 11 2010-11, Cygwin, mingw, Interix 3.5, 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

--- a/doc/glibc-functions/fstatfs.texi
+++ b/doc/glibc-functions/fstatfs.texi
@@ -13,4 +13,9 @@
 @item
 This function is missing on some platforms:
 AIX 5.1, mingw, Interix 3.5, BeOS.
+@item
+On platforms where @code{f_blocks} in @samp{struct statfs} is a 32-bit
+value, this function may not work correctly on files systems larger than
+4 TiB.  The fix is to use the @code{AC_SYS_LARGEFILE} macro.  This affects
+MacOS X.
 @end itemize

--- a/doc/glibc-functions/fts_children.texi
+++ b/doc/glibc-functions/fts_children.texi
@@ -13,4 +13,11 @@
 @item
 This function is missing on some platforms:
 AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 11 2010-11, mingw, BeOS.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+correctly report the size of files or block devices larger than 2 GB and
+may not work correctly on huge directories larger than 2 GB.  Also, on
+platforms where @code{ino_t} is a 32-bit type, this function may report
+inode numbers incorrectly.  The fix is to use the @code{AC_SYS_LARGEFILE}
+macro (only on MacOS X systems).
 @end itemize

--- a/doc/glibc-functions/fts_read.texi
+++ b/doc/glibc-functions/fts_read.texi
@@ -13,4 +13,11 @@
 @item
 This function is missing on some platforms:
 AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 11 2010-11, mingw, BeOS.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+correctly report the size of files or block devices larger than 2 GB and
+may not work correctly on huge directories larger than 2 GB.  Also, on
+platforms where @code{ino_t} is a 32-bit type, this function may report
+inode numbers incorrectly.  The fix is to use the @code{AC_SYS_LARGEFILE}
+macro (only on MacOS X systems).
 @end itemize

--- a/doc/glibc-functions/getdirentries.texi
+++ b/doc/glibc-functions/getdirentries.texi
@@ -13,4 +13,8 @@
 @item
 This function is missing on some platforms:
 AIX 4.3.2, IRIX 6.5, Solaris 11 2010-11, Cygwin, mingw, Interix 3.5, BeOS.
+@item
+On platforms where @code{off_t} 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.
 @end itemize

--- a/doc/glibc-functions/mkostemp.texi
+++ b/doc/glibc-functions/mkostemp.texi
@@ -14,6 +14,10 @@
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+On platforms where @code{off_t} is a 32-bit type, @code{mkostemp} may not work
+correctly to create files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize
 
 The gnulib module @code{clean-temp} can create temporary files that will not

--- a/doc/glibc-functions/mkostemps.texi
+++ b/doc/glibc-functions/mkostemps.texi
@@ -14,6 +14,10 @@
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+On platforms where @code{off_t} is a 32-bit type, @code{mkostemps} may not work
+correctly to create files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize
 
 The gnulib module @code{clean-temp} can create temporary files that will not

--- a/doc/glibc-functions/mkstemps.texi
+++ b/doc/glibc-functions/mkstemps.texi
@@ -18,6 +18,10 @@
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+On platforms where @code{off_t} is a 32-bit type, @code{mkstemps} may not work
+correctly to create files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize
 
 The gnulib module @code{clean-temp} can create temporary files that will not

--- a/doc/glibc-functions/preadv.texi
+++ b/doc/glibc-functions/preadv.texi
@@ -13,4 +13,8 @@
 @item
 This function is missing on some platforms:
 glibc 2.9, MacOS X 10.5, FreeBSD 5.2.1, AIX 5.2, HP-UX 11.31, IRIX 6.5, OSF/1 5.1, Solaris 11 2010-11, Cygwin, mingw, Interix 3.5, BeOS.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/glibc-functions/pwritev.texi
+++ b/doc/glibc-functions/pwritev.texi
@@ -13,4 +13,8 @@
 @item
 This function is missing on some platforms:
 glibc 2.9, MacOS X 10.5, FreeBSD 5.2.1, AIX 5.2, HP-UX 11.31, IRIX 6.5, OSF/1 5.1, Solaris 11 2010-11, Cygwin, mingw, Interix 3.5, BeOS.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/glibc-functions/sendfile.texi
+++ b/doc/glibc-functions/sendfile.texi
@@ -13,4 +13,8 @@
 @item
 This function is missing on some platforms:
 MacOS X 10.4, NetBSD 5.0, OpenBSD 3.8, AIX 5.1, IRIX 6.5, OSF/1 4.0, Solaris 11 2010-11, Cygwin, mingw, Interix 3.5, BeOS.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/glibc-functions/statfs.texi
+++ b/doc/glibc-functions/statfs.texi
@@ -13,4 +13,9 @@
 @item
 This function is missing on some platforms:
 AIX 5.1, mingw, Interix 3.5, BeOS.
+@item
+On platforms where @code{f_blocks} in @samp{struct statfs} is a 32-bit
+value, this function may not work correctly on files systems larger than
+4 TiB.  The fix is to use the @code{AC_SYS_LARGEFILE} macro.  This affects
+MacOS X.
 @end itemize

--- a/doc/posix-functions/aio_cancel.texi
+++ b/doc/posix-functions/aio_cancel.texi
@@ -15,4 +15,8 @@
 @item
 This function is missing on some platforms:
 NetBSD 3.0, OpenBSD 3.8, OSF/1 5.1, Solaris 2.4, Cygwin, mingw, Interix 3.5, BeOS.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/aio_error.texi
+++ b/doc/posix-functions/aio_error.texi
@@ -15,4 +15,8 @@
 @item
 This function is missing on some platforms:
 NetBSD 3.0, OpenBSD 3.8, AIX 5.1, OSF/1 5.1, Solaris 2.4, Cygwin, mingw, Interix 3.5, BeOS.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/aio_fsync.texi
+++ b/doc/posix-functions/aio_fsync.texi
@@ -15,4 +15,8 @@
 @item
 This function is missing on some platforms:
 FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, OSF/1 5.1, Solaris 2.4, Cygwin, mingw, Interix 3.5, BeOS.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/aio_read.texi
+++ b/doc/posix-functions/aio_read.texi
@@ -15,4 +15,8 @@
 @item
 This function is missing on some platforms:
 NetBSD 3.0, OpenBSD 3.8, OSF/1 5.1, Solaris 2.4, Cygwin, mingw, Interix 3.5, BeOS.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/aio_return.texi
+++ b/doc/posix-functions/aio_return.texi
@@ -15,4 +15,8 @@
 @item
 This function is missing on some platforms:
 NetBSD 3.0, OpenBSD 3.8, AIX 5.1, OSF/1 5.1, Solaris 2.4, Cygwin, mingw, Interix 3.5, BeOS.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/aio_suspend.texi
+++ b/doc/posix-functions/aio_suspend.texi
@@ -15,4 +15,8 @@
 @item
 This function is missing on some platforms:
 NetBSD 3.0, OpenBSD 3.8, OSF/1 5.1, Solaris 2.4, Cygwin, mingw, Interix 3.5, BeOS.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/aio_write.texi
+++ b/doc/posix-functions/aio_write.texi
@@ -15,4 +15,8 @@
 @item
 This function is missing on some platforms:
 NetBSD 3.0, OpenBSD 3.8, OSF/1 5.1, Solaris 2.4, Cygwin, mingw, Interix 3.5, BeOS.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/fgetpos.texi
+++ b/doc/posix-functions/fgetpos.texi
@@ -17,6 +17,10 @@
 on input streams that are opened in @code{O_TEXT} mode and whose contents
 contains Unix line terminators (LF), on some platforms: mingw.
 @item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
+@item
 On platforms where @code{off_t} is a 64-bit type, but @code{fseeko} is
 not present, stream operations on files larger than 2 GB silently do
 the wrong thing.  This affects BSD/OS, which is mostly obsolete.

--- a/doc/posix-functions/fopen.texi
+++ b/doc/posix-functions/fopen.texi
@@ -28,6 +28,10 @@
 this means that it translates @code{'\n'} to CR/LF by default.  Use the
 @code{"b"} flag if you need reliable binary I/O.
 @item
+On platforms where @code{off_t} is a 32-bit type, @code{fopen} may not work
+correctly with files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
+@item
 On Windows platforms (excluding Cygwin), this function fails to open
 directories for reading.  Such streams have implementation-defined
 semantics on other platforms.  To avoid directory streams with a

--- a/doc/posix-functions/freopen.texi
+++ b/doc/posix-functions/freopen.texi
@@ -24,6 +24,10 @@
 directory, on some platforms:
 HP-UX 11.00, Solaris 9, Irix 5.3.
 @item
+On platforms where @code{off_t} is a 32-bit type, @code{freopen} may not work
+correctly with files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
+@item
 Applications should not assume that @code{fileno(f)} will be the same
 before and after a call to @code{freopen(name,mode,f)}.  However, the
 module freopen-safer can at least protect @code{stdin}, @code{stdout},

--- a/doc/posix-functions/fsetpos.texi
+++ b/doc/posix-functions/fsetpos.texi
@@ -12,4 +12,8 @@
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/fstatvfs.texi
+++ b/doc/posix-functions/fstatvfs.texi
@@ -15,4 +15,9 @@
 @item
 This function is missing on some platforms:
 MacOS X 10.3, OpenBSD 3.8, mingw.
+@item
+On platforms where @code{f_blocks} in @samp{struct statvfs} is a 32-bit
+value, this function may not work correctly on files systems larger than
+4 TiB.  The fix is to use the @code{AC_SYS_LARGEFILE} macro.  This affects
+glibc/Hurd, HP-UX 11, Solaris.
 @end itemize

--- a/doc/posix-functions/ftruncate.texi
+++ b/doc/posix-functions/ftruncate.texi
@@ -12,4 +12,8 @@
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+On platforms where @code{off_t} is a 32-bit type, this function is not
+applicable to arbitrary lengths for files larger than 2 GB.  The fix is to
+use the @code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/ftw.texi
+++ b/doc/posix-functions/ftw.texi
@@ -15,4 +15,8 @@
 @item
 This function is missing on some platforms:
 MacOS X 10.3, FreeBSD 5.2.1, NetBSD 3.0, mingw, BeOS.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+correctly report the size of files or block devices larger than 2 GB.
+The fix is to use the @code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/getrlimit.texi
+++ b/doc/posix-functions/getrlimit.texi
@@ -15,4 +15,8 @@
 @item
 This function is missing on some platforms:
 mingw, BeOS.
+@item
+On platforms where @code{rlim_t} is a 32-bit type, this function does not
+allow to retrieve limits larger than 4 GB, such as for RLIMIT_FSIZE.  The
+fix is to use the @code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/glob.texi
+++ b/doc/posix-functions/glob.texi
@@ -19,5 +19,9 @@
 Portability problems not fixed by Gnulib:
 @itemize
 @item
+On platforms where @code{off_t} 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.
+@item
 Some platforms may store additional flags in the @code{gl_flags} field.
 @end itemize

--- a/doc/posix-functions/lio_listio.texi
+++ b/doc/posix-functions/lio_listio.texi
@@ -15,4 +15,8 @@
 @item
 This function is missing on some platforms:
 NetBSD 3.0, OpenBSD 3.8, OSF/1 5.1, Solaris 2.4, Cygwin, mingw, Interix 3.5, BeOS.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/lockf.texi
+++ b/doc/posix-functions/lockf.texi
@@ -15,4 +15,8 @@
 @item
 This function is missing on some platforms:
 Cygwin 1.5.x, mingw, 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

--- a/doc/posix-functions/mkstemp.texi
+++ b/doc/posix-functions/mkstemp.texi
@@ -27,6 +27,10 @@
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+On platforms where @code{off_t} is a 32-bit type, @code{mkstemp} may not work
+correctly to create files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize
 
 The gnulib module @code{clean-temp} can create temporary files that will not

--- a/doc/posix-functions/mmap.texi
+++ b/doc/posix-functions/mmap.texi
@@ -16,6 +16,10 @@
 This function is missing on some platforms:
 mingw, 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.
+@item
 To get anonymous memory, on some platforms, you can use the flags
 @code{MAP_ANONYMOUS | MAP_PRIVATE} and @code{-1} instead of a file descriptor;
 on others you have to use a read-only file descriptor of @file{/dev/zero}.

--- a/doc/posix-functions/nftw.texi
+++ b/doc/posix-functions/nftw.texi
@@ -15,4 +15,8 @@
 @item
 This function is missing on some platforms:
 MacOS X 10.3, FreeBSD 5.2.1, NetBSD 3.0, mingw, BeOS.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+correctly report the size of files or block devices larger than 2 GB.
+The fix is to use the @code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/openat.texi
+++ b/doc/posix-functions/openat.texi
@@ -22,4 +22,8 @@
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+On platforms where @code{off_t} is a 32-bit type, @code{open} may not work
+correctly with files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/opendir.texi
+++ b/doc/posix-functions/opendir.texi
@@ -12,4 +12,9 @@
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on huge directories larger than 2 GB.  Also, on platforms
+where @code{ino_t} is a 32-bit type, this function may report inode numbers
+incorrectly.  The fix is to use the @code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/posix_fadvise.texi
+++ b/doc/posix-functions/posix_fadvise.texi
@@ -16,4 +16,8 @@
 This function is missing on some platforms:
 MacOS X 10.5, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, HP-UX 11.23,
 IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x, mingw, Interix 3.5, 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

--- a/doc/posix-functions/posix_fallocate.texi
+++ b/doc/posix-functions/posix_fallocate.texi
@@ -16,4 +16,8 @@
 This function is missing on some platforms:
 MacOS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, AIX 5.1, HP-UX 11,
 IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x, mingw, Interix 3.5, 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

--- a/doc/posix-functions/pread.texi
+++ b/doc/posix-functions/pread.texi
@@ -22,4 +22,8 @@
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/pwrite.texi
+++ b/doc/posix-functions/pwrite.texi
@@ -23,4 +23,8 @@
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/readdir.texi
+++ b/doc/posix-functions/readdir.texi
@@ -12,4 +12,9 @@
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on huge directories larger than 2 GB.  Also, on platforms
+where @code{ino_t} is a 32-bit type, this function may report inode numbers
+incorrectly.  The fix is to use the @code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/readdir_r.texi
+++ b/doc/posix-functions/readdir_r.texi
@@ -18,4 +18,9 @@
 @item
 This function is missing on some platforms:
 mingw, BeOS.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on huge directories larger than 2 GB.  Also, on platforms
+where @code{ino_t} is a 32-bit type, this function may report inode numbers
+incorrectly.  The fix is to use the @code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/rewinddir.texi
+++ b/doc/posix-functions/rewinddir.texi
@@ -12,4 +12,8 @@
 
 Portability problems not fixed by Gnulib:
 @itemize
+@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

--- a/doc/posix-functions/scandir.texi
+++ b/doc/posix-functions/scandir.texi
@@ -21,4 +21,9 @@
 @item
 The fourth parameter of this function is declared as @code{int (*) (void *, void *)} on some platforms:
 AIX 5.1.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on huge directories larger than 2 GB.  Also, on platforms
+where @code{ino_t} is a 32-bit type, this function may report inode numbers
+incorrectly.  The fix is to use the @code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/seekdir.texi
+++ b/doc/posix-functions/seekdir.texi
@@ -15,4 +15,8 @@
 @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

--- a/doc/posix-functions/setrlimit.texi
+++ b/doc/posix-functions/setrlimit.texi
@@ -15,4 +15,8 @@
 @item
 This function is missing on some platforms:
 mingw, BeOS.
+@item
+On platforms where @code{rlim_t} is a 32-bit type, this function does not
+allow to set limits larger than 4 GB, such as for RLIMIT_FSIZE.  The fix is
+to use the @code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/statvfs.texi
+++ b/doc/posix-functions/statvfs.texi
@@ -15,6 +15,11 @@
 @item
 This function is missing on some platforms:
 MacOS X 10.3, OpenBSD 3.8, mingw.
+@item
+On platforms where @code{f_blocks} in @samp{struct statvfs} is a 32-bit
+value, this function may not work correctly on files systems larger than
+4 TiB.  The fix is to use the @code{AC_SYS_LARGEFILE} macro.  This affects
+glibc/Hurd, HP-UX 11, Solaris.
 @end itemize
 
 Gnulib provides a module @code{fsusage} that provides similar information

--- a/doc/posix-functions/telldir.texi
+++ b/doc/posix-functions/telldir.texi
@@ -15,4 +15,8 @@
 @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

--- a/doc/posix-functions/tmpfile.texi
+++ b/doc/posix-functions/tmpfile.texi
@@ -15,4 +15,8 @@
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+On platforms where @code{off_t} is a 32-bit type, @code{tmpfile} may not work
+correctly to create files larger than 2 GB.  The fix is to use the
+@code{AC_SYS_LARGEFILE} macro.
 @end itemize

--- a/doc/posix-functions/truncate.texi
+++ b/doc/posix-functions/truncate.texi
@@ -15,4 +15,8 @@
 @item
 This function is missing on some platforms:
 mingw.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function is not
+applicable to arbitrary lengths for files larger than 2 GB.  The fix is to
+use the @code{AC_SYS_LARGEFILE} macro.
 @end itemize