Index: detail/os_file_functions.hpp
===================================================================
--- detail/os_file_functions.hpp	(revision 83488)
+++ detail/os_file_functions.hpp	(working copy)
@@ -25,6 +25,7 @@
 #  include <boost/interprocess/detail/win32_api.hpp>
 #else
 #  ifdef BOOST_HAS_UNISTD_H
+#     include <features.h> // _LARGEFILE64_SOURCE
 #     include <fcntl.h>
 #     include <unistd.h>
 #     include <sys/types.h>
@@ -367,12 +368,24 @@
    bool           is_xsi;
 }  mapping_handle_t;
 
+
+// You need to define -D_FILE_OFFSET_BITS=64
+// for accessing large files on x32.
+#if defined(_LARGEFILE64_SOURCE) && defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS==64
+typedef enum { read_only      = O_RDONLY | O_LARGEFILE
+             , read_write     = O_RDWR | O_LARGEFILE
+             , copy_on_write
+             , read_private
+             , invalid_mode   = 0xffff
+             } mode_t;
+#else
 typedef enum { read_only      = O_RDONLY
              , read_write     = O_RDWR
              , copy_on_write
              , read_private
              , invalid_mode   = 0xffff
              } mode_t;
+#endif
 
 typedef enum { file_begin     = SEEK_SET
              , file_end       = SEEK_END
@@ -444,6 +457,9 @@
    return ret;
 }
 
+// You need to define -D_FILE_OFFSET_BITS=64
+// for accessing large files on x32
+// (requires _LARGEFILE64_SOURCE defined by system libraries).
 inline file_handle_t open_existing_file
    (const char *name, mode_t mode, bool temporary = false)
 {