re PR libfortran/15472 (implicit open for unformatted file causes run-time error)

re PR libfortran/15472 (implicit open for unformatted file causes run-time error)

2004-07-04  Bud Davis  <bdavis9659@comcast.net>
            Paul Brook  <paul@codesourcery.com>

        PR fortran/15472
        * io/transfer.c(us_write): set recl for seq unform writes to max size.
        * io/transfer.c(data_transfer_init): handle un-opened seq unform unit.
        * io/unix.c(fd_alloc_w_at): handle requests at start, fd_flush at
          right time.
        * io/unix.c(is_seekable): set based upon the file/device, not the
          method being used to access it (fd or mmap).
        * io/unix.c(fd_flush): don't set file_size if !seekable.
        * io/unix.c(fd_truncate: ditto.
        * gfortran.fortran-torture/execute/seq_io.f90: New test.

Co-Authored-By: Paul Brook <paul@codesourcery.com>
From-SVN: r84104