gettimeofday: port recent C++ fix to Emacs

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

diff --git a/doc/posix-functions/mmap.texi b/doc/posix-functions/mmap.texi
index 4343e3f..19a39a6 100644 (file)
--- a/doc/posix-functions/mmap.texi
+++ b/doc/posix-functions/mmap.texi
@@ -14,7 +14,11 @@ Portability problems not fixed by Gnulib:
 @itemize
 @item
 This function is missing on some platforms:
-mingw, BeOS.
+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.
 @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;