diff -r -U3 coreutils-8.13/lib/freadahead.c coreutils-8.13-patched/lib/freadahead.c
--- coreutils-8.13/lib/freadahead.c	2011-08-19 10:09:37.000000000 -0600
+++ coreutils-8.13-patched/lib/freadahead.c	2019-08-01 19:02:30.847557265 -0600
@@ -25,7 +25,7 @@
 size_t
 freadahead (FILE *fp)
 {
-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+#if defined _IO_EOF_SEEN || defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
   if (fp->_IO_write_ptr > fp->_IO_write_base)
     return 0;
   return (fp->_IO_read_end - fp->_IO_read_ptr)
diff -r -U3 coreutils-8.13/lib/freadptr.c coreutils-8.13-patched/lib/freadptr.c
--- coreutils-8.13/lib/freadptr.c	2011-08-19 10:09:37.000000000 -0600
+++ coreutils-8.13-patched/lib/freadptr.c	2019-08-01 19:02:30.851557318 -0600
@@ -29,7 +29,7 @@
   size_t size;
 
   /* Keep this code in sync with freadahead!  */
-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+#if defined _IO_EOF_SEEN || defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
   if (fp->_IO_write_ptr > fp->_IO_write_base)
     return NULL;
   size = fp->_IO_read_end - fp->_IO_read_ptr;
diff -r -U3 coreutils-8.13/lib/freadseek.c coreutils-8.13-patched/lib/freadseek.c
--- coreutils-8.13/lib/freadseek.c	2011-08-19 10:09:37.000000000 -0600
+++ coreutils-8.13-patched/lib/freadseek.c	2019-08-01 19:02:30.851557318 -0600
@@ -34,7 +34,7 @@
 freadptrinc (FILE *fp, size_t increment)
 {
   /* Keep this code in sync with freadptr!  */
-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+#if defined _IO_EOF_SEEN || defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
   fp->_IO_read_ptr += increment;
 #elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
   fp_->_p += increment;
diff -r -U3 coreutils-8.13/lib/fseeko.c coreutils-8.13-patched/lib/fseeko.c
--- coreutils-8.13/lib/fseeko.c	2011-08-12 02:05:46.000000000 -0600
+++ coreutils-8.13-patched/lib/fseeko.c	2019-08-01 19:02:30.851557318 -0600
@@ -42,7 +42,7 @@
 #endif
 
   /* These tests are based on fpurge.c.  */
-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+#if defined _IO_EOF_SEEN || defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
   if (fp->_IO_read_end == fp->_IO_read_ptr
       && fp->_IO_write_ptr == fp->_IO_write_base
       && fp->_IO_save_base == NULL)
diff -r -U3 coreutils-8.13/lib/fseterr.c coreutils-8.13-patched/lib/fseterr.c
--- coreutils-8.13/lib/fseterr.c	2011-08-19 10:09:37.000000000 -0600
+++ coreutils-8.13-patched/lib/fseterr.c	2019-08-01 19:02:30.851557318 -0600
@@ -29,7 +29,7 @@
   /* Most systems provide FILE as a struct and the necessary bitmask in
      <stdio.h>, because they need it for implementing getc() and putc() as
      fast macros.  */
-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+#if defined _IO_EOF_SEEN || defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
   fp->_flags |= _IO_ERR_SEEN;
 #elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
   fp_->_flags |= __SERR;
diff -r -U3 coreutils-8.13/lib/stdio-impl.h coreutils-8.13-patched/lib/stdio-impl.h
--- coreutils-8.13/lib/stdio-impl.h	2011-04-24 11:21:45.000000000 -0600
+++ coreutils-8.13-patched/lib/stdio-impl.h	2019-08-01 19:02:30.851557318 -0600
@@ -18,6 +18,12 @@
    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
+ *       internals.  */
+#if !defined _IO_IN_BACKUP && defined _IO_EOF_SEEN
+# define _IO_IN_BACKUP 0x100
+#endif
 
 /* BSD stdio derived implementations.  */
 
diff -r -U3 coreutils-8.13/lib/stdio.in.h coreutils-8.13-patched/lib/stdio.in.h
--- coreutils-8.13/lib/stdio.in.h	2011-06-17 02:06:20.000000000 -0600
+++ coreutils-8.13-patched/lib/stdio.in.h	2019-08-01 19:03:47.484586570 -0600
@@ -697,7 +697,7 @@
 /* It is very rare that the developer ever has full control of stdin,
    so any use of gets warrants an unconditional warning.  Assume it is
    always declared, since it is required by C89.  */
-_GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
+/* _GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead"); */
 #endif