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, 2 deletions

diff --git a/libio/tst-mmap-eofsync.c b/libio/tst-mmap-eofsync.c
index e8ef727148..0c568e8eb5 100644
--- a/libio/tst-mmap-eofsync.c
+++ b/libio/tst-mmap-eofsync.c
@@ -60,7 +60,6 @@ do_test (void)
   printf ("feof = %d, ferror = %d immediately after fgets\n",
 	  feof (f), ferror (f));
 
-#if 1
   c = fgetc (f);
   if (c == EOF)
     printf ("fgetc -> EOF (feof = %d, ferror = %d)\n",
@@ -71,7 +70,6 @@ do_test (void)
 	      c, feof (f), ferror (f));
       result = 1;
     }
-#endif
 
   c = write (temp_fd, text2, sizeof text2 - 1);
   if (c == sizeof text2 - 1)