Remove miscellaneous debris from libio.

This patch eliminates a number of #if 0 and #ifdef TODO blocks, macros
that are never used, macros that provide portability to substrates that
lack basic things like EINVAL and off_t, and other such debris.

I preserved IO_DEBUG and CHECK_FILE, even though as far as I can tell
IO_DEBUG is never defined and therefore CHECK_FILE never does
anything, because it seems like we might actually want to turn it _on_.

Installed stripped libraries and executables are unchanged, except,
again, that the line number of an assertion changes (this time it's
somewhere in fileops.c).

	* libio/libio.h (_IO_pos_BAD, _IO_pos_0, _IO_pos_adjust):
	Define here, unconditionally.
	* libio/iolibio.h (_IO_pos_BAD): Don't define here.
	* libio/libioP.h: Remove #if 0 blocks.
	(_IO_pos_BAD, _IO_pos_0, _IO_pos_adjust): Don't define here.
	(_IO_va_start, COERCE_FILE, MAYBE_SET_EINVAL): Don't define.
	(CHECK_FILE): Don't use MAYBE_SET_EINVAL or COERCE_FILE.  Fix style.

	* libio/clearerr.c, libio/fputc.c, libio/getchar.c:
	Assume weak_alias is always defined.

	* libio/fileops.c, libio/genops.c, libio/oldfileops.c
	* libio/oldpclose.c, libio/pclose.c, libio/wfileops.c:
	Remove #if 0 and #ifdef TODO blocks.
	Assume text_set_element is always defined.

	* libio/iofdopen.c, libio/iogetdelim.c, libio/oldiofdopen.c
	Use __set_errno (EINVAL) instead of MAYBE_SET_EINVAL.
	* libio/tst-mmap-eofsync.c: Make #if 1 block unconditional.

1 files changed, 0 insertions, 5 deletions

diff --git a/libio/wfileops.c b/libio/wfileops.c
index fa265bc1ea..1dbf72f797 100644
--- a/libio/wfileops.c
+++ b/libio/wfileops.c
@@ -196,13 +196,9 @@ _IO_wfile_underflow (FILE *fp)
       _IO_wdoallocbuf (fp);
     }
 
-  /* Flush all line buffered files before reading. */
   /* FIXME This can/should be moved to genops ?? */
   if (fp->_flags & (_IO_LINE_BUF | _IO_UNBUFFERED))
     {
-#if 0
-      _IO_flush_all_linebuffered ();
-#else
       /* We used to flush all line-buffered stream.  This really isn't
 	 required by any standard.  My recollection is that
 	 traditional Unix systems did this for stdout.  stderr better
@@ -215,7 +211,6 @@ _IO_wfile_underflow (FILE *fp)
 	_IO_OVERFLOW (_IO_stdout, EOF);
 
       _IO_release_lock (_IO_stdout);
-#endif
     }
 
   _IO_switch_to_get_mode (fp);