Re: [patch #6758] Add support for Atari FreeMiNT OS to fpurge

[Bruno Haible]

Alan Hourihane wrote:
> > Is anything else among the aforementioned unit tests still failing?
> 
> Yes. The last problem is fseeko() as mentioned.

The 'if (0)' is not right: it causes the lseek to be skipped entirely in gnulib.
But we have the requirement that fflush followed by fseek acts like lseek,
and in the mintlib sources
  - the only calls to lseek are through the __io_funcs.__seek function,
  - fflush does not always invoke __io_funcs.__seek,
  - fseek does not invoke __io_funcs.__seek, except to determine the end for
    SEEK_END.

How about the currently committed code with this additional patch? Does this
work?

*** lib/fseeko.c.orig   2009-03-01 13:25:17.000000000 +0100
--- lib/fseeko.c        2009-03-01 13:24:57.000000000 +0100
***************
*** 117,122 ****
--- 117,125 ----
        fp->_flags &= ~_IOEOF;
  #elif defined _IOERR                /* AIX, HP-UX, IRIX, OSF/1, Solaris, 
OpenServer, mingw */
        fp->_flag &= ~_IOEOF;
+ #elif defined __MINT__              /* Atari FreeMiNT */
+       fp->__offset = pos;
+       fp->__eof = 0;
  #endif
        /* If we were not requested to position beyond end of file, we're
         done.  */

Bruno