diff --git a/meta-citadel/recipes-core/coreutils/coreutils/0001-local.mk-fix-cross-compiling-problem.patch b/meta-citadel/recipes-core/coreutils/coreutils/0001-local.mk-fix-cross-compiling-problem.patch
new file mode 100644
index 0000000..66f9a71
--- /dev/null
+++ b/meta-citadel/recipes-core/coreutils/coreutils/0001-local.mk-fix-cross-compiling-problem.patch
@@ -0,0 +1,26 @@
+Subject: local.mk: fix cross compiling problem
+
+We meet the following error when cross compiling.
+| Makefile:3418: *** Recursive variable 'INSTALL' references itself (eventually).  Stop.
+This patch fixes this problem.
+
+Upstream-Status: Pending
+
+Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
+---
+ src/local.mk | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/local.mk b/src/local.mk
+index 36dfa4e..c5898cc 100644
+--- a/src/local.mk
++++ b/src/local.mk
+@@ -649,4 +649,4 @@ cu_install_program = @INSTALL_PROGRAM@
+ else
+ cu_install_program = src/ginstall
+ endif
+-INSTALL = $(cu_install_program) -c
++INSTALL_PROGRAM = $(cu_install_program)
+-- 
+2.1.0
+
diff --git a/meta-citadel/recipes-core/coreutils/coreutils/0001-uname-report-processor-and-hardware-correctly.patch b/meta-citadel/recipes-core/coreutils/coreutils/0001-uname-report-processor-and-hardware-correctly.patch
new file mode 100644
index 0000000..3c43e1d
--- /dev/null
+++ b/meta-citadel/recipes-core/coreutils/coreutils/0001-uname-report-processor-and-hardware-correctly.patch
@@ -0,0 +1,64 @@
+Upstream-Status: Denied
+
+Subject: uname: report processor and hardware correctly
+
+This patch is rejected by coreutils upstream, but distros like debian and fedora
+uses this patch to make `uname -i' and `uname -p' to not report 'unknown'.
+
+Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
+---
+ src/uname.c | 18 ++++++++++++++++--
+ 1 file changed, 16 insertions(+), 2 deletions(-)
+
+diff --git a/src/uname.c b/src/uname.c
+index 39bd28c..c84582d 100644
+--- a/src/uname.c
++++ b/src/uname.c
+@@ -299,13 +299,19 @@ main (int argc, char **argv)
+ 
+   if (toprint & PRINT_PROCESSOR)
+     {
+-      char const *element = unknown;
++      char *element = unknown;
+ #if HAVE_SYSINFO && defined SI_ARCHITECTURE
+       {
+         static char processor[257];
+         if (0 <= sysinfo (SI_ARCHITECTURE, processor, sizeof processor))
+           element = processor;
+       }
++#else
++      {
++	static struct utsname u;
++	uname(&u);
++	element = u.machine;
++      }
+ #endif
+ #ifdef UNAME_PROCESSOR
+       if (element == unknown)
+@@ -343,7 +349,7 @@ main (int argc, char **argv)
+ 
+   if (toprint & PRINT_HARDWARE_PLATFORM)
+     {
+-      char const *element = unknown;
++      char *element = unknown;
+ #if HAVE_SYSINFO && defined SI_PLATFORM
+       {
+         static char hardware_platform[257];
+@@ -361,6 +367,14 @@ main (int argc, char **argv)
+           if (sysctl (mib, 2, hardware_platform, &s, 0, 0) >= 0)
+             element = hardware_platform;
+         }
++#else
++      {
++	static struct utsname u;
++	uname(&u);
++	element = u.machine;
++	if(strlen(element)==4 && element[0]=='i' && element[2]=='8' && element[3]=='6')
++	  element[1]='3';
++      }
+ #endif
+       if (! (toprint == UINT_MAX && element == unknown))
+         print_element (element);
+-- 
+1.9.1
+
diff --git a/meta-citadel/recipes-core/coreutils/coreutils/disable-ls-output-quoting.patch b/meta-citadel/recipes-core/coreutils/coreutils/disable-ls-output-quoting.patch
new file mode 100644
index 0000000..e68c213
--- /dev/null
+++ b/meta-citadel/recipes-core/coreutils/coreutils/disable-ls-output-quoting.patch
@@ -0,0 +1,49 @@
+Subject: revert inconsistent ls quoting
+
+This is a revert of upstream commit 109b9220cead6e979d22d16327c4d9f8350431cc.
+
+Bug-Debian: https://bugs.debian.org/813164
+
+Upstream-Status: Submitted
+
+Originally-by: Adam Borowski <kilobyte@angband.pl>
+[PG: patch from https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=813164#78 ]
+Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
+
+---
+
+--- coreutils-8.25.orig/NEWS
++++ coreutils-8.25/NEWS
+@@ -71,9 +71,6 @@ GNU coreutils NEWS
+   df now prefers sources towards the root of a device when
+   eliding duplicate bind mounted entries.
+ 
+-  ls now quotes file names unambiguously and appropriate for use in a shell,
+-  when outputting to a terminal.
+-
+   join, sort, uniq with --zero-terminated, now treat '\n' as a field delimiter.
+ 
+ ** Improvements
+--- coreutils-8.25.orig/doc/coreutils.texi
++++ coreutils-8.25/doc/coreutils.texi
+@@ -7750,8 +7750,8 @@ this"} in the default C locale.  This lo
+ 
+ You can specify the default value of the @option{--quoting-style} option
+ with the environment variable @env{QUOTING_STYLE}@.  If that environment
+-variable is not set, the default value is @samp{shell-escape} when the
+-output is a terminal, and @samp{literal} otherwise.
++variable is not set, the default value is @samp{literal}, but this
++default may change to @samp{shell} in a future version of this package.
+ 
+ @item --show-control-chars
+ @opindex --show-control-chars
+--- coreutils-8.25.orig/src/ls.c
++++ coreutils-8.25/src/ls.c
+@@ -1581,7 +1581,6 @@ decode_switches (int argc, char **argv)
+       if (isatty (STDOUT_FILENO))
+         {
+           format = many_per_line;
+-          set_quoting_style (NULL, shell_escape_quoting_style);
+           /* See description of qmark_funny_chars, above.  */
+           qmark_funny_chars = true;
+         }
diff --git a/meta-citadel/recipes-core/coreutils/coreutils/fix-selinux-flask.patch b/meta-citadel/recipes-core/coreutils/coreutils/fix-selinux-flask.patch
new file mode 100644
index 0000000..9d1ae55
--- /dev/null
+++ b/meta-citadel/recipes-core/coreutils/coreutils/fix-selinux-flask.patch
@@ -0,0 +1,39 @@
+From a1d360509fa3a4aff57eedcd528cc0347a87531d Mon Sep 17 00:00:00 2001
+From: Robert Yang <liezhi.yang@windriver.com>
+Date: Tue, 16 Sep 2014 01:59:08 -0700
+Subject: [PATCH] gnulib-comp.m4: selinux/flask.h should respect to
+ with_selinux
+
+Fixed when build with meta-selinux even when --without-selinux:
+runcon.c:49:28: fatal error: selinux/flask.h: No such file or directory
+ # include <selinux/flask.h>
+                            ^
+compilation terminated.
+
+Upstream-Status: Pending
+
+Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
+---
+ m4/gnulib-comp.m4 |    2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/m4/gnulib-comp.m4 b/m4/gnulib-comp.m4
+index 472d3a0..5f09734 100644
+--- a/m4/gnulib-comp.m4
++++ b/m4/gnulib-comp.m4
+@@ -1730,11 +1730,11 @@ AC_DEFUN([gl_INIT],
+     AC_LIBOBJ([select])
+   fi
+   gl_SYS_SELECT_MODULE_INDICATOR([select])
+-  AC_CHECK_HEADERS([selinux/flask.h])
+   AC_LIBOBJ([selinux-at])
+   gl_HEADERS_SELINUX_SELINUX_H
+   gl_HEADERS_SELINUX_CONTEXT_H
+   if test "$with_selinux" != no && test "$ac_cv_header_selinux_selinux_h" = yes; then
++    AC_CHECK_HEADERS([selinux/flask.h])
+     AC_LIBOBJ([getfilecon])
+   fi
+   gl_SERVENT
+-- 
+1.7.9.5
+
diff --git a/meta-citadel/recipes-core/coreutils/coreutils/remove-usr-local-lib-from-m4.patch b/meta-citadel/recipes-core/coreutils/coreutils/remove-usr-local-lib-from-m4.patch
new file mode 100644
index 0000000..2ef8a54
--- /dev/null
+++ b/meta-citadel/recipes-core/coreutils/coreutils/remove-usr-local-lib-from-m4.patch
@@ -0,0 +1,31 @@
+We have problem using hardcoded directories like /usr/local here
+which will be checked for cross builds. This is a special case which
+is valid for AIX only. We do not have AIX as one of our supported
+build host or target. Therefore we get rid of the hardcoded paths
+and make life easier for cross compilation process.
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+Upstream-Status: Inappropriate [Upstream does care for AIX while we may not]
+
+Index: coreutils-8.14/m4/getloadavg.m4
+===================================================================
+--- coreutils-8.14.orig/m4/getloadavg.m4	2011-09-19 08:09:24.000000000 -0700
++++ coreutils-8.14/m4/getloadavg.m4	2011-10-19 21:42:00.385533357 -0700
+@@ -41,16 +41,6 @@
+        [LIBS="-lutil $LIBS" gl_func_getloadavg_done=yes])
+    fi
+ 
+-   if test $gl_func_getloadavg_done = no; then
+-     # There is a commonly available library for RS/6000 AIX.
+-     # Since it is not a standard part of AIX, it might be installed locally.
+-     gl_getloadavg_LIBS=$LIBS
+-     LIBS="-L/usr/local/lib $LIBS"
+-     AC_CHECK_LIB([getloadavg], [getloadavg],
+-                  [LIBS="-lgetloadavg $LIBS" gl_func_getloadavg_done=yes],
+-                  [LIBS=$gl_getloadavg_LIBS])
+-   fi
+-
+    # Set up the replacement function if necessary.
+    if test $gl_func_getloadavg_done = no; then
+      HAVE_GETLOADAVG=0
diff --git a/meta-citadel/recipes-core/coreutils/coreutils_8.30.bb b/meta-citadel/recipes-core/coreutils/coreutils_8.30.bb
new file mode 100644
index 0000000..8f4ee55
--- /dev/null
+++ b/meta-citadel/recipes-core/coreutils/coreutils_8.30.bb
@@ -0,0 +1,139 @@
+SUMMARY = "The basic file, shell and text manipulation utilities"
+DESCRIPTION = "The GNU Core Utilities provide the basic file, shell and text \
+manipulation utilities. These are the core utilities which are expected to exist on \
+every system."
+HOMEPAGE = "http://www.gnu.org/software/coreutils/"
+BUGTRACKER = "http://debbugs.gnu.org/coreutils"
+LICENSE = "GPLv3+"
+LIC_FILES_CHKSUM = "file://COPYING;md5=d32239bcb673463ab874e80d47fae504\
+                    file://src/ls.c;beginline=1;endline=15;md5=dbe356a88b09c29232b083d1ff8ac82a"
+DEPENDS = "gmp libcap"
+DEPENDS_class-native = ""
+
+inherit autotools gettext texinfo
+
+SRC_URI = "${GNU_MIRROR}/coreutils/${BP}.tar.xz \
+           file://remove-usr-local-lib-from-m4.patch \
+           file://fix-selinux-flask.patch \
+           file://0001-uname-report-processor-and-hardware-correctly.patch \
+           file://disable-ls-output-quoting.patch \
+           file://0001-local.mk-fix-cross-compiling-problem.patch \
+          "
+
+SRC_URI[md5sum] = "ab06d68949758971fe744db66b572816"
+SRC_URI[sha256sum] = "e831b3a86091496cdba720411f9748de81507798f6130adeaef872d206e1b057"
+
+EXTRA_OECONF_class-native = "--without-gmp"
+EXTRA_OECONF_class-target = "--enable-install-program=arch,hostname --libexecdir=${libdir}"
+EXTRA_OECONF_class-nativesdk = "--enable-install-program=arch,hostname"
+
+# acl and xattr are not default features
+#
+PACKAGECONFIG_class-target ??= "\
+    ${@bb.utils.filter('DISTRO_FEATURES', 'acl xattr', d)} \
+"
+
+# The lib/oe/path.py requires xattr
+PACKAGECONFIG_class-native ??= "xattr"
+
+# with, without, depends, rdepends
+#
+PACKAGECONFIG[acl] = "--enable-acl,--disable-acl,acl,"
+PACKAGECONFIG[xattr] = "--enable-xattr,--disable-xattr,attr,"
+PACKAGECONFIG[single-binary] = "--enable-single-binary,--disable-single-binary,,"
+
+# [ df mktemp nice printenv base64 gets a special treatment and is not included in this
+bindir_progs = "arch basename chcon cksum comm csplit cut dir dircolors dirname du \
+                env expand expr factor fmt fold groups head hostid id install \
+                join link logname md5sum mkfifo nl nohup nproc od paste pathchk \
+                pinky pr printf ptx readlink realpath runcon seq sha1sum sha224sum sha256sum \
+                sha384sum sha512sum shred shuf sort split stdbuf sum tac tail tee test timeout \
+                tr truncate tsort tty unexpand uniq unlink uptime users vdir wc who whoami yes"
+
+# hostname gets a special treatment and is not included in this
+base_bindir_progs = "cat chgrp chmod chown cp date dd echo false hostname kill ln ls mkdir \
+                     mknod mv pwd rm rmdir sleep stty sync touch true uname stat"
+
+sbindir_progs= "chroot"
+
+# Let aclocal use the relative path for the m4 file rather than the
+# absolute since coreutils has a lot of m4 files, otherwise there might
+# be an "Argument list too long" error when it is built in a long/deep
+# directory.
+acpaths = "-I ./m4"
+
+# Deal with a separate builddir failure if src doesn't exist when creating version.c/version.h
+do_compile_prepend () {
+	mkdir -p ${B}/src
+}
+
+do_install_class-native() {
+	autotools_do_install
+	# remove groups to fix conflict with shadow-native
+	rm -f ${D}${STAGING_BINDIR_NATIVE}/groups
+	# The return is a must since native doesn't need the
+	# do_install_append() in the below.
+	return
+}
+
+do_install_append() {
+	for i in df mktemp nice printenv base64; do mv ${D}${bindir}/$i ${D}${bindir}/$i.${BPN}; done
+
+	install -d ${D}${base_bindir}
+	[ "${base_bindir}" != "${bindir}" ] && for i in ${base_bindir_progs}; do mv ${D}${bindir}/$i ${D}${base_bindir}/$i.${BPN}; done
+
+	install -d ${D}${sbindir}
+	[ "${sbindir}" != "${bindir}" ] && for i in ${sbindir_progs}; do mv ${D}${bindir}/$i ${D}${sbindir}/$i.${BPN}; done
+
+	# [ requires special handling because [.coreutils will cause the sed stuff
+	# in update-alternatives to fail, therefore use lbracket - the name used
+	# for the actual source file.
+	mv ${D}${bindir}/[ ${D}${bindir}/lbracket.${BPN}
+}
+
+inherit update-alternatives
+
+ALTERNATIVE_PRIORITY = "100"
+# Make hostname's priority higher than busybox but lower than net-tools
+ALTERNATIVE_PRIORITY[hostname] = "90"
+ALTERNATIVE_${PN} = "lbracket ${bindir_progs} ${base_bindir_progs} ${sbindir_progs} base64 nice printenv mktemp df"
+ALTERNATIVE_${PN}-doc = "base64.1 nice.1 mktemp.1 df.1 groups.1 kill.1 uptime.1 stat.1 hostname.1"
+
+ALTERNATIVE_LINK_NAME[hostname.1] = "${mandir}/man1/hostname.1"
+
+ALTERNATIVE_LINK_NAME[base64] = "${base_bindir}/base64"
+ALTERNATIVE_TARGET[base64] = "${bindir}/base64.${BPN}"
+ALTERNATIVE_LINK_NAME[base64.1] = "${mandir}/man1/base64.1"
+
+ALTERNATIVE_LINK_NAME[mktemp] = "${base_bindir}/mktemp"
+ALTERNATIVE_TARGET[mktemp] = "${bindir}/mktemp.${BPN}"
+ALTERNATIVE_LINK_NAME[mktemp.1] = "${mandir}/man1/mktemp.1"
+
+ALTERNATIVE_LINK_NAME[df] = "${base_bindir}/df"
+ALTERNATIVE_TARGET[df] = "${bindir}/df.${BPN}"
+ALTERNATIVE_LINK_NAME[df.1] = "${mandir}/man1/df.1"
+
+ALTERNATIVE_LINK_NAME[nice] = "${base_bindir}/nice"
+ALTERNATIVE_TARGET[nice] = "${bindir}/nice.${BPN}"
+ALTERNATIVE_LINK_NAME[nice.1] = "${mandir}/man1/nice.1"
+
+ALTERNATIVE_LINK_NAME[printenv] = "${base_bindir}/printenv"
+ALTERNATIVE_TARGET[printenv] = "${bindir}/printenv.${BPN}"
+
+ALTERNATIVE_LINK_NAME[lbracket] = "${bindir}/["
+ALTERNATIVE_TARGET[lbracket] = "${bindir}/lbracket.${BPN}"
+
+ALTERNATIVE_LINK_NAME[groups.1] = "${mandir}/man1/groups.1"
+ALTERNATIVE_LINK_NAME[uptime.1] = "${mandir}/man1/uptime.1"
+ALTERNATIVE_LINK_NAME[kill.1] = "${mandir}/man1/kill.1"
+ALTERNATIVE_LINK_NAME[stat.1] = "${mandir}/man1/stat.1"
+
+python __anonymous() {
+    for prog in d.getVar('base_bindir_progs').split():
+        d.setVarFlag('ALTERNATIVE_LINK_NAME', prog, '%s/%s' % (d.getVar('base_bindir'), prog))
+
+    for prog in d.getVar('sbindir_progs').split():
+        d.setVarFlag('ALTERNATIVE_LINK_NAME', prog, '%s/%s' % (d.getVar('sbindir'), prog))
+}
+
+BBCLASSEXTEND = "native nativesdk"
diff --git a/meta-citadel/recipes-core/glibc/cross-localedef-native_2.27.bbappend b/meta-citadel/recipes-core/glibc/cross-localedef-native_2.27.bbappend
new file mode 100644
index 0000000..30c7ea3
--- /dev/null
+++ b/meta-citadel/recipes-core/glibc/cross-localedef-native_2.27.bbappend
@@ -0,0 +1 @@
+SRCREV_localedef = "c328777219ccc480be3112cf807217ca6b570b64"
diff --git a/meta-citadel/recipes-devtools/bison/bison_3.0.4.bbappend b/meta-citadel/recipes-devtools/bison/bison_3.0.4.bbappend
new file mode 100644
index 0000000..7ecf31d
--- /dev/null
+++ b/meta-citadel/recipes-devtools/bison/bison_3.0.4.bbappend
@@ -0,0 +1,3 @@
+
+FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
+SRC_URI += "file://gnulib.patch"
diff --git a/meta-citadel/recipes-devtools/bison/files/gnulib.patch b/meta-citadel/recipes-devtools/bison/files/gnulib.patch
new file mode 100644
index 0000000..7eaf0ce
--- /dev/null
+++ b/meta-citadel/recipes-devtools/bison/files/gnulib.patch
@@ -0,0 +1,21 @@
+Fix gnulib issues found with glibc 2.28 libio.h removal
+
+see
+https://lists.gnu.org/r/bug-gnulib/2018-03/msg00000.html
+
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+Index: bison-3.0.4/lib/fseterr.c
+===================================================================
+--- bison-3.0.4.orig/lib/fseterr.c
++++ bison-3.0.4/lib/fseterr.c
+@@ -29,7 +29,7 @@ fseterr (FILE *fp)
+   /* 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 || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+   fp->_flags |= _IO_ERR_SEEN;
+ #elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin */
+   fp_->_flags |= __SERR;
diff --git a/meta-citadel/recipes-devtools/m4/files/m4-1.4.18-glibc-change-work-around.patch b/meta-citadel/recipes-devtools/m4/files/m4-1.4.18-glibc-change-work-around.patch
new file mode 100644
index 0000000..5ff62ee
--- /dev/null
+++ b/meta-citadel/recipes-devtools/m4/files/m4-1.4.18-glibc-change-work-around.patch
@@ -0,0 +1,130 @@
+update for glibc libio.h removal in 2.28+
+
+see
+https://src.fedoraproject.org/rpms/m4/c/814d592134fad36df757f9a61422d164ea2c6c9b?branch=master
+
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+Index: m4-1.4.18/lib/fflush.c
+===================================================================
+--- m4-1.4.18.orig/lib/fflush.c
++++ m4-1.4.18/lib/fflush.c
+@@ -33,7 +33,7 @@
+ #undef fflush
+ 
+ 
+-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+ 
+ /* Clear the stream's ungetc buffer, preserving the value of ftello (fp).  */
+ static void
+@@ -72,7 +72,7 @@ clear_ungetc_buffer (FILE *fp)
+ 
+ #endif
+ 
+-#if ! (defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */)
++#if ! (defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */)
+ 
+ # if (defined __sferror || defined __DragonFly__ || defined __ANDROID__) && defined __SNPT
+ /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Android */
+@@ -148,7 +148,7 @@ rpl_fflush (FILE *stream)
+   if (stream == NULL || ! freading (stream))
+     return fflush (stream);
+ 
+-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+ 
+   clear_ungetc_buffer_preserving_position (stream);
+ 
+Index: m4-1.4.18/lib/fpending.c
+===================================================================
+--- m4-1.4.18.orig/lib/fpending.c
++++ m4-1.4.18/lib/fpending.c
+@@ -32,7 +32,7 @@ __fpending (FILE *fp)
+   /* 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 || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+   return fp->_IO_write_ptr - fp->_IO_write_base;
+ #elif defined __sferror || defined __DragonFly__ || defined __ANDROID__
+   /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Android */
+Index: m4-1.4.18/lib/fpurge.c
+===================================================================
+--- m4-1.4.18.orig/lib/fpurge.c
++++ m4-1.4.18/lib/fpurge.c
+@@ -62,7 +62,7 @@ fpurge (FILE *fp)
+   /* 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 || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+   fp->_IO_read_end = fp->_IO_read_ptr;
+   fp->_IO_write_ptr = fp->_IO_write_base;
+   /* Avoid memory leak when there is an active ungetc buffer.  */
+Index: m4-1.4.18/lib/freadahead.c
+===================================================================
+--- m4-1.4.18.orig/lib/freadahead.c
++++ m4-1.4.18/lib/freadahead.c
+@@ -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 || __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)
+Index: m4-1.4.18/lib/freading.c
+===================================================================
+--- m4-1.4.18.orig/lib/freading.c
++++ m4-1.4.18/lib/freading.c
+@@ -31,7 +31,7 @@ freading (FILE *fp)
+   /* 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 || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+   return ((fp->_flags & _IO_NO_WRITES) != 0
+           || ((fp->_flags & (_IO_NO_READS | _IO_CURRENTLY_PUTTING)) == 0
+               && fp->_IO_read_base != NULL));
+Index: m4-1.4.18/lib/fseeko.c
+===================================================================
+--- m4-1.4.18.orig/lib/fseeko.c
++++ m4-1.4.18/lib/fseeko.c
+@@ -47,7 +47,7 @@ fseeko (FILE *fp, off_t offset, int when
+ #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 || __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)
+@@ -123,7 +123,7 @@ fseeko (FILE *fp, off_t offset, int when
+           return -1;
+         }
+ 
+-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+       fp->_flags &= ~_IO_EOF_SEEN;
+       fp->_offset = pos;
+ #elif defined __sferror || defined __DragonFly__ || defined __ANDROID__
+Index: m4-1.4.18/lib/stdio-impl.h
+===================================================================
+--- m4-1.4.18.orig/lib/stdio-impl.h
++++ m4-1.4.18/lib/stdio-impl.h
+@@ -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 --git a/meta-citadel/recipes-devtools/m4/m4-native_1.4.18.bbappend b/meta-citadel/recipes-devtools/m4/m4-native_1.4.18.bbappend
new file mode 100644
index 0000000..b2b8682
--- /dev/null
+++ b/meta-citadel/recipes-devtools/m4/m4-native_1.4.18.bbappend
@@ -0,0 +1,2 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
+SRC_URI += "file://m4-1.4.18-glibc-change-work-around.patch"
diff --git a/meta-citadel/recipes-devtools/m4/m4_1.4.18.bbappend b/meta-citadel/recipes-devtools/m4/m4_1.4.18.bbappend
new file mode 100644
index 0000000..b2b8682
--- /dev/null
+++ b/meta-citadel/recipes-devtools/m4/m4_1.4.18.bbappend
@@ -0,0 +1,2 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
+SRC_URI += "file://m4-1.4.18-glibc-change-work-around.patch"