Update from Gnulib

This incorporates:
2019-10-11 Simplify and regularize regex use of ‘assert’
2019-10-09 regex: omit debug assignment when not debugging
2019-10-09 regex: tell compiler there’s at most 256 arcs out
2019-10-09 regex: simplify by assuming C99
2019-10-09 regex: avoid copying of uninitialized storage
2019-09-29 fbufmode: Fix compilation error on glibc >= 2.28 systems
2019-09-28 Update comments that refer to POSIX
2019-09-23 Update URLs and associated text
* doc/misc/texinfo.tex, lib/open.c, lib/regcomp.c:
* lib/regex_internal.c, lib/regex_internal.h, lib/regexec.c:
* lib/stdio-impl.h:
Copy from Gnulib.

1 files changed, 9 insertions, 4 deletions

diff --git a/lib/stdio-impl.h b/lib/stdio-impl.h
index 4260468b612..d49625780bb 100644
--- a/lib/stdio-impl.h
+++ b/lib/stdio-impl.h
@@ -18,11 +18,16 @@
    the same implementation of stdio extension API, except that some fields
    have different naming conventions, or their access requires some casts.  */
 
-/* Glibc 2.28 made _IO_IN_BACKUP private.  For now, work around this
-   problem by defining it ourselves.  FIXME: Do not rely on glibc
+/* Glibc 2.28 made _IO_UNBUFFERED and _IO_IN_BACKUP private.  For now, work
+   around this problem by defining them ourselves.  FIXME: Do not rely on glibc
    internals.  */
-#if !defined _IO_IN_BACKUP && defined _IO_EOF_SEEN
-# define _IO_IN_BACKUP 0x100
+#if defined _IO_EOF_SEEN
+# if !defined _IO_UNBUFFERED
+#  define _IO_UNBUFFERED 0x2
+# endif
+# if !defined _IO_IN_BACKUP
+#  define _IO_IN_BACKUP 0x100
+# endif
 #endif
 
 /* BSD stdio derived implementations.  */