diff --git a/poky/meta/recipes-core/glibc/glibc/0001-localedef-Add-hardlink-resolver-from-util-linux.patch b/poky/meta/recipes-core/glibc/glibc/0001-localedef-Add-hardlink-resolver-from-util-linux.patch
new file mode 100644
index 0000000..d0786be
--- /dev/null
+++ b/poky/meta/recipes-core/glibc/glibc/0001-localedef-Add-hardlink-resolver-from-util-linux.patch
@@ -0,0 +1,1130 @@
+From 3dcf144e998aed17b3fb957a255b1e923ba07d71 Mon Sep 17 00:00:00 2001
+From: Jason Wessel <jason.wessel@windriver.com>
+Date: Sat, 7 Dec 2019 09:59:22 -0800
+Subject: [PATCH] localedef: Add hardlink resolver from util-linux
+
+The hard link resolver that is built into localedef cannot be run in
+parallel.  It will search sibling directories (which are be processed
+in parallel) and perform a creation of a .tmp file and remove the
+original and move the .tmp file in.  The problem is that if a probe
+occurs a hard link can be requested to the file that is being removed.
+This will lead to a stray copy or potentially, on a loaded system
+cause race condition which pseudo cannot deal with, where it is left
+with a hard link request to a file that no longer exists.  In this
+situation psuedo will inherit the permissions of what ever the target
+inode had to offer.
+
+In short, there are two problems:
+
+1) You will be left with stray copies when using the hard link
+resolution that is built in while running in parallel with
+localedef.
+
+2) When running under pseudo the possibility exists for uid/gid
+leakage when the source file is removed before the hard link can
+be completed.
+
+The solution is to call localedef with --no-hard-links and separately
+process the hardlinks at a later point.  To do this requires the
+inclusion of the hardlink utility found in modern versions of
+util-linux.  Most host systems do not have this, so it will be
+included with the cross-localedef binary.
+
+[YOCTO #11299]
+[YOCTO #12434]
+
+Upstream-Status: Pending
+
+Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ locale/programs/c.h                        | 407 ++++++++++++++++
+ locale/programs/cross-localedef-hardlink.c | 528 +++++++++++++++++++++
+ locale/programs/xalloc.h                   | 129 +++++
+ 3 files changed, 1064 insertions(+)
+ create mode 100644 locale/programs/c.h
+ create mode 100644 locale/programs/cross-localedef-hardlink.c
+ create mode 100644 locale/programs/xalloc.h
+
+diff --git a/locale/programs/c.h b/locale/programs/c.h
+new file mode 100644
+index 0000000000..d0a402e90e
+--- /dev/null
++++ b/locale/programs/c.h
+@@ -0,0 +1,407 @@
++/*
++ * Fundamental C definitions.
++ */
++
++#ifndef UTIL_LINUX_C_H
++#define UTIL_LINUX_C_H
++
++#include <limits.h>
++#include <stddef.h>
++#include <stdint.h>
++#include <stdio.h>
++#include <unistd.h>
++#include <stdarg.h>
++#include <stdlib.h>
++#include <string.h>
++#include <errno.h>
++
++#include <assert.h>
++
++#ifdef HAVE_ERR_H
++# include <err.h>
++#endif
++
++#ifdef HAVE_SYS_SYSMACROS_H
++# include <sys/sysmacros.h>     /* for major, minor */
++#endif
++
++#ifndef LOGIN_NAME_MAX
++# define LOGIN_NAME_MAX 256
++#endif
++
++#ifndef NAME_MAX
++# define NAME_MAX PATH_MAX
++#endif
++
++/*
++ * __GNUC_PREREQ is deprecated in favour of __has_attribute() and
++ * __has_feature(). The __has macros are supported by clang and gcc>=5.
++ */
++#ifndef __GNUC_PREREQ
++# if defined __GNUC__ && defined __GNUC_MINOR__
++#  define __GNUC_PREREQ(maj, min) \
++	((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
++# else
++#  define __GNUC_PREREQ(maj, min) 0
++# endif
++#endif
++
++#ifdef __GNUC__
++
++/* &a[0] degrades to a pointer: a different type from an array */
++# define __must_be_array(a) \
++	UL_BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(__typeof__(a), __typeof__(&a[0])))
++
++# define ignore_result(x) __extension__ ({ \
++	__typeof__(x) __dummy __attribute__((__unused__)) = (x); (void) __dummy; \
++})
++
++#else /* !__GNUC__ */
++# define __must_be_array(a)	0
++# define __attribute__(_arg_)
++# define ignore_result(x) ((void) (x))
++#endif /* !__GNUC__ */
++
++/*
++ * It evaluates to 1 if the attribute/feature is supported by the current
++ * compilation targed. Fallback for old compilers.
++ */
++#ifndef __has_attribute
++  #define __has_attribute(x) 0
++#endif
++
++#ifndef __has_feature
++  #define __has_feature(x) 0
++#endif
++
++/*
++ * Function attributes
++ */
++#ifndef __ul_alloc_size
++# if (__has_attribute(alloc_size) && __has_attribute(warn_unused_result)) || __GNUC_PREREQ (4, 3)
++#  define __ul_alloc_size(s) __attribute__((alloc_size(s), warn_unused_result))
++# else
++#  define __ul_alloc_size(s)
++# endif
++#endif
++
++#ifndef __ul_calloc_size
++# if (__has_attribute(alloc_size) && __has_attribute(warn_unused_result)) || __GNUC_PREREQ (4, 3)
++#  define __ul_calloc_size(n, s) __attribute__((alloc_size(n, s), warn_unused_result))
++# else
++#  define __ul_calloc_size(n, s)
++# endif
++#endif
++
++#if __has_attribute(returns_nonnull) || __GNUC_PREREQ (4, 9)
++# define __ul_returns_nonnull __attribute__((returns_nonnull))
++#else
++# define __ul_returns_nonnull
++#endif
++
++/*
++ * Force a compilation error if condition is true, but also produce a
++ * result (of value 0 and type size_t), so the expression can be used
++ * e.g. in a structure initializer (or wherever else comma expressions
++ * aren't permitted).
++ */
++#define UL_BUILD_BUG_ON_ZERO(e) __extension__ (sizeof(struct { int:-!!(e); }))
++#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))
++
++#ifndef ARRAY_SIZE
++# define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
++#endif
++
++#ifndef PATH_MAX
++# define PATH_MAX 4096
++#endif
++
++#ifndef TRUE
++# define TRUE 1
++#endif
++
++#ifndef FALSE
++# define FALSE 0
++#endif
++
++#ifndef min
++# define min(x, y) __extension__ ({		\
++	__typeof__(x) _min1 = (x);		\
++	__typeof__(y) _min2 = (y);		\
++	(void) (&_min1 == &_min2);		\
++	_min1 < _min2 ? _min1 : _min2; })
++#endif
++
++#ifndef max
++# define max(x, y) __extension__ ({		\
++	__typeof__(x) _max1 = (x);		\
++	__typeof__(y) _max2 = (y);		\
++	(void) (&_max1 == &_max2);		\
++	_max1 > _max2 ? _max1 : _max2; })
++#endif
++
++#ifndef cmp_numbers
++# define cmp_numbers(x, y) __extension__ ({	\
++	__typeof__(x) _a = (x);			\
++	__typeof__(y) _b = (y);			\
++	(void) (&_a == &_b);			\
++	_a == _b ? 0 : _a > _b ? 1 : -1; })
++#endif
++
++#ifndef offsetof
++#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
++#endif
++
++/*
++ * container_of - cast a member of a structure out to the containing structure
++ * @ptr:	the pointer to the member.
++ * @type:	the type of the container struct this is embedded in.
++ * @member:	the name of the member within the struct.
++ */
++#ifndef container_of
++#define container_of(ptr, type, member) __extension__ ({	\
++	const __typeof__( ((type *)0)->member ) *__mptr = (ptr); \
++	(type *)( (char *)__mptr - offsetof(type,member) );})
++#endif
++
++#ifndef HAVE_PROGRAM_INVOCATION_SHORT_NAME
++# ifdef HAVE___PROGNAME
++extern char *__progname;
++#  define program_invocation_short_name __progname
++# else
++#  ifdef HAVE_GETEXECNAME
++#   define program_invocation_short_name \
++		prog_inv_sh_nm_from_file(getexecname(), 0)
++#  else
++#   define program_invocation_short_name \
++		prog_inv_sh_nm_from_file(__FILE__, 1)
++#  endif
++static char prog_inv_sh_nm_buf[256];
++static inline char *
++prog_inv_sh_nm_from_file(char *f, char stripext)
++{
++	char *t;
++
++	if ((t = strrchr(f, '/')) != NULL)
++		t++;
++	else
++		t = f;
++
++	strncpy(prog_inv_sh_nm_buf, t, sizeof(prog_inv_sh_nm_buf) - 1);
++	prog_inv_sh_nm_buf[sizeof(prog_inv_sh_nm_buf) - 1] = '\0';
++
++	if (stripext && (t = strrchr(prog_inv_sh_nm_buf, '.')) != NULL)
++		*t = '\0';
++
++	return prog_inv_sh_nm_buf;
++}
++# endif
++#endif
++
++
++#ifndef HAVE_ERR_H
++static inline void
++errmsg(char doexit, int excode, char adderr, const char *fmt, ...)
++{
++	fprintf(stderr, "%s: ", program_invocation_short_name);
++	if (fmt != NULL) {
++		va_list argp;
++		va_start(argp, fmt);
++		vfprintf(stderr, fmt, argp);
++		va_end(argp);
++		if (adderr)
++			fprintf(stderr, ": ");
++	}
++	if (adderr)
++		fprintf(stderr, "%m");
++	fprintf(stderr, "\n");
++	if (doexit)
++		exit(excode);
++}
++
++#ifndef HAVE_ERR
++# define err(E, FMT...) errmsg(1, E, 1, FMT)
++#endif
++
++#ifndef HAVE_ERRX
++# define errx(E, FMT...) errmsg(1, E, 0, FMT)
++#endif
++
++#ifndef HAVE_WARN
++# define warn(FMT...) errmsg(0, 0, 1, FMT)
++#endif
++
++#ifndef HAVE_WARNX
++# define warnx(FMT...) errmsg(0, 0, 0, FMT)
++#endif
++#endif /* !HAVE_ERR_H */
++
++
++/* Don't use inline function to avoid '#include "nls.h"' in c.h
++ */
++#define errtryhelp(eval) __extension__ ({ \
++	fprintf(stderr, _("Try '%s --help' for more information.\n"), \
++			program_invocation_short_name); \
++	exit(eval); \
++})
++
++/* After failed execvp() */
++#define EX_EXEC_FAILED		126	/* Program located, but not usable. */
++#define EX_EXEC_ENOENT		127	/* Could not find program to exec.  */
++#define errexec(name)	err(errno == ENOENT ? EX_EXEC_ENOENT : EX_EXEC_FAILED, \
++			_("failed to execute %s"), name)
++
++
++static inline __attribute__((const)) int is_power_of_2(unsigned long num)
++{
++	return (num != 0 && ((num & (num - 1)) == 0));
++}
++
++#ifndef HAVE_LOFF_T
++typedef int64_t loff_t;
++#endif
++
++#if !defined(HAVE_DIRFD) && (!defined(HAVE_DECL_DIRFD) || HAVE_DECL_DIRFD == 0) && defined(HAVE_DIR_DD_FD)
++#include <sys/types.h>
++#include <dirent.h>
++static inline int dirfd(DIR *d)
++{
++	return d->dd_fd;
++}
++#endif
++
++/*
++ * Fallback defines for old versions of glibc
++ */
++#include <fcntl.h>
++
++#ifdef O_CLOEXEC
++#define UL_CLOEXECSTR	"e"
++#else
++#define UL_CLOEXECSTR	""
++#endif
++
++#ifndef O_CLOEXEC
++#define O_CLOEXEC 0
++#endif
++
++#ifdef __FreeBSD_kernel__
++#ifndef F_DUPFD_CLOEXEC
++#define F_DUPFD_CLOEXEC	17	/* Like F_DUPFD, but FD_CLOEXEC is set */
++#endif
++#endif
++
++
++#ifndef AI_ADDRCONFIG
++#define AI_ADDRCONFIG 0x0020
++#endif
++
++#ifndef IUTF8
++#define IUTF8 0040000
++#endif
++
++/*
++ * MAXHOSTNAMELEN replacement
++ */
++static inline size_t get_hostname_max(void)
++{
++	long len = sysconf(_SC_HOST_NAME_MAX);
++
++	if (0 < len)
++		return len;
++
++#ifdef MAXHOSTNAMELEN
++	return MAXHOSTNAMELEN;
++#elif HOST_NAME_MAX
++	return HOST_NAME_MAX;
++#endif
++	return 64;
++}
++
++
++/*
++ * Constant strings for usage() functions. For more info see
++ * Documentation/{howto-usage-function.txt,boilerplate.c}
++ */
++#define USAGE_HEADER     ("\nUsage:\n")
++#define USAGE_OPTIONS    ("\nOptions:\n")
++#define USAGE_FUNCTIONS  ("\nFunctions:\n")
++#define USAGE_COMMANDS   ("\nCommands:\n")
++#define USAGE_COLUMNS    ("\nAvailable output columns:\n")
++#define USAGE_SEPARATOR    "\n"
++
++#define USAGE_OPTSTR_HELP     ("display this help")
++#define USAGE_OPTSTR_VERSION  ("display version")
++
++#define USAGE_HELP_OPTIONS(marg_dsc) \
++		"%-" #marg_dsc "s%s\n" \
++		"%-" #marg_dsc "s%s\n" \
++		, " -h, --help",    USAGE_OPTSTR_HELP \
++		, " -V, --version", USAGE_OPTSTR_VERSION
++
++#define USAGE_MAN_TAIL(_man)   ("\nFor more details see %s.\n"), _man
++
++#define UTIL_LINUX_VERSION ("%s from %s\n"), program_invocation_short_name, PACKAGE_STRING
++
++#define print_version(eval) __extension__ ({ \
++		printf(UTIL_LINUX_VERSION); \
++		exit(eval); \
++})
++
++/*
++ * scanf modifiers for "strings allocation"
++ */
++#ifdef HAVE_SCANF_MS_MODIFIER
++#define UL_SCNsA	"%ms"
++#elif defined(HAVE_SCANF_AS_MODIFIER)
++#define UL_SCNsA	"%as"
++#endif
++
++/*
++ * seek stuff
++ */
++#ifndef SEEK_DATA
++# define SEEK_DATA	3
++#endif
++#ifndef SEEK_HOLE
++# define SEEK_HOLE	4
++#endif
++
++
++/*
++ * Macros to convert #define'itions to strings, for example
++ * #define XYXXY 42
++ * printf ("%s=%s\n", stringify(XYXXY), stringify_value(XYXXY));
++ */
++#define stringify_value(s) stringify(s)
++#define stringify(s) #s
++
++/*
++ * UL_ASAN_BLACKLIST is a macro to tell AddressSanitizer (a compile-time
++ * instrumentation shipped with Clang and GCC) to not instrument the
++ * annotated function.  Furthermore, it will prevent the compiler from
++ * inlining the function because inlining currently breaks the blacklisting
++ * mechanism of AddressSanitizer.
++ */
++#if __has_feature(address_sanitizer) && __has_attribute(no_sanitize_memory) && __has_attribute(no_sanitize_address)
++# define UL_ASAN_BLACKLIST __attribute__((noinline)) __attribute__((no_sanitize_memory)) __attribute__((no_sanitize_address))
++#else
++# define UL_ASAN_BLACKLIST	/* nothing */
++#endif
++
++/*
++ * Note that sysconf(_SC_GETPW_R_SIZE_MAX) returns *initial* suggested size for
++ * pwd buffer and in some cases it is not large enough. See POSIX and
++ * getpwnam_r man page for more details.
++ */
++#define UL_GETPW_BUFSIZ	(16 * 1024)
++
++/*
++ * Darwin or other BSDs may only have MAP_ANON. To get it on Darwin we must
++ * define _DARWIN_C_SOURCE before including sys/mman.h. We do this in config.h.
++ */
++#if !defined MAP_ANONYMOUS && defined MAP_ANON
++# define MAP_ANONYMOUS  (MAP_ANON)
++#endif
++
++#endif /* UTIL_LINUX_C_H */
+diff --git a/locale/programs/cross-localedef-hardlink.c b/locale/programs/cross-localedef-hardlink.c
+new file mode 100644
+index 0000000000..63615896b0
+--- /dev/null
++++ b/locale/programs/cross-localedef-hardlink.c
+@@ -0,0 +1,528 @@
++/*
++ * hardlink - consolidate duplicate files via hardlinks
++ *
++ * Copyright (C) 2018 Red Hat, Inc. All rights reserved.
++ * Written by Jakub Jelinek <jakub@redhat.com>
++ *
++ * Copyright (C) 2019 Karel Zak <kzak@redhat.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it would be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License along
++ * with this program; if not, write to the Free Software Foundation, Inc.,
++ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
++ */
++#include <sys/types.h>
++#include <stdlib.h>
++#include <getopt.h>
++#include <stdio.h>
++#include <unistd.h>
++#include <sys/stat.h>
++#include <sys/mman.h>
++#include <string.h>
++#include <dirent.h>
++#include <fcntl.h>
++#include <errno.h>
++#ifdef HAVE_PCRE
++# define PCRE2_CODE_UNIT_WIDTH 8
++# include <pcre2.h>
++#endif
++
++#include "c.h"
++#include "xalloc.h"
++#include "nls.h"
++#include "closestream.h"
++
++#define NHASH   (1<<17)  /* Must be a power of 2! */
++#define NBUF    64
++
++struct hardlink_file;
++
++struct hardlink_hash {
++	struct hardlink_hash *next;
++	struct hardlink_file *chain;
++	off_t size;
++	time_t mtime;
++};
++
++struct hardlink_dir {
++	struct hardlink_dir *next;
++	char name[];
++};
++
++struct hardlink_file {
++	struct hardlink_file *next;
++	ino_t ino;
++	dev_t dev;
++	unsigned int cksum;
++	char name[];
++};
++
++struct hardlink_dynstr {
++	char *buf;
++	size_t alloc;
++};
++
++struct hardlink_ctl {
++	struct hardlink_dir *dirs;
++	struct hardlink_hash *hps[NHASH];
++	char iobuf1[BUFSIZ];
++	char iobuf2[BUFSIZ];
++	/* summary counters */
++	unsigned long long ndirs;
++	unsigned long long nobjects;
++	unsigned long long nregfiles;
++	unsigned long long ncomp;
++	unsigned long long nlinks;
++	unsigned long long nsaved;
++	/* current device */
++	dev_t dev;
++	/* flags */
++	unsigned int verbose;
++	unsigned int
++		no_link:1,
++		content_only:1,
++		force:1;
++};
++/* ctl is in global scope due use in atexit() */
++struct hardlink_ctl global_ctl;
++
++__attribute__ ((always_inline))
++static inline unsigned int hash(off_t size, time_t mtime)
++{
++	return (size ^ mtime) & (NHASH - 1);
++}
++
++__attribute__ ((always_inline))
++static inline int stcmp(struct stat *st1, struct stat *st2, int content_scope)
++{
++	if (content_scope)
++		return st1->st_size != st2->st_size;
++
++	return st1->st_mode != st2->st_mode
++		|| st1->st_uid != st2->st_uid
++		|| st1->st_gid != st2->st_gid
++		|| st1->st_size != st2->st_size
++		|| st1->st_mtime != st2->st_mtime;
++}
++
++static void print_summary(void)
++{
++	struct hardlink_ctl const *const ctl = &global_ctl;
++
++	if (!ctl->verbose)
++		return;
++
++	if (ctl->verbose > 1 && ctl->nlinks)
++		fputc('\n', stdout);
++
++	printf(_("Directories:   %9lld\n"), ctl->ndirs);
++	printf(_("Objects:       %9lld\n"), ctl->nobjects);
++	printf(_("Regular files: %9lld\n"), ctl->nregfiles);
++	printf(_("Comparisons:   %9lld\n"), ctl->ncomp);
++	printf(  "%s%9lld\n", (ctl->no_link ?
++	       _("Would link:    ") :
++	       _("Linked:        ")), ctl->nlinks);
++	printf(  "%s %9lld\n", (ctl->no_link ?
++	       _("Would save:   ") :
++	       _("Saved:        ")), ctl->nsaved);
++}
++
++static void __attribute__((__noreturn__)) usage(void)
++{
++	fputs(USAGE_HEADER, stdout);
++	printf(_(" %s [options] directory...\n"), program_invocation_short_name);
++
++	fputs(USAGE_SEPARATOR, stdout);
++	puts(_("Consolidate duplicate files using hardlinks."));
++
++	fputs(USAGE_OPTIONS, stdout);
++	puts(_(" -c, --content          compare only contents, ignore permission, etc."));
++	puts(_(" -n, --dry-run          don't actually link anything"));
++	puts(_(" -v, --verbose          print summary after hardlinking"));
++	puts(_(" -vv                    print every hardlinked file and summary"));
++	puts(_(" -f, --force            force hardlinking across filesystems"));
++	puts(_(" -x, --exclude <regex>  exclude files matching pattern"));
++
++	fputs(USAGE_SEPARATOR, stdout);
++	printf(USAGE_HELP_OPTIONS(16)); /* char offset to align option descriptions */
++	printf(USAGE_MAN_TAIL("hardlink(1)"));
++	exit(EXIT_SUCCESS);
++}
++
++__attribute__ ((always_inline))
++static inline size_t add2(size_t a, size_t b)
++{
++	size_t sum = a + b;
++
++	if (sum < a)
++		errx(EXIT_FAILURE, _("integer overflow"));
++	return sum;
++}
++
++__attribute__ ((always_inline))
++static inline size_t add3(size_t a, size_t b, size_t c)
++{
++	return add2(add2(a, b), c);
++}
++
++static void growstr(struct hardlink_dynstr *str, size_t newlen)
++{
++	if (newlen < str->alloc)
++		return;
++	str->buf = xrealloc(str->buf, str->alloc = add2(newlen, 1));
++}
++
++static void process_path(struct hardlink_ctl *ctl, const char *name)
++{
++	struct stat st, st2, st3;
++	const size_t namelen = strlen(name);
++
++	ctl->nobjects++;
++	if (lstat(name, &st))
++		return;
++
++	if (st.st_dev != ctl->dev && !ctl->force) {
++		if (ctl->dev)
++			errx(EXIT_FAILURE,
++			     _("%s is on different filesystem than the rest "
++			       "(use -f option to override)."), name);
++		ctl->dev = st.st_dev;
++	}
++	if (S_ISDIR(st.st_mode)) {
++		struct hardlink_dir *dp = xmalloc(add3(sizeof(*dp), namelen, 1));
++		memcpy(dp->name, name, namelen + 1);
++		dp->next = ctl->dirs;
++		ctl->dirs = dp;
++
++	} else if (S_ISREG(st.st_mode)) {
++		int fd, i;
++		struct hardlink_file *fp, *fp2;
++		struct hardlink_hash *hp;
++		const char *n1, *n2;
++		unsigned int buf[NBUF];
++		int cksumsize = sizeof(buf);
++		unsigned int cksum;
++		time_t mtime = ctl->content_only ? 0 : st.st_mtime;
++		unsigned int hsh = hash(st.st_size, mtime);
++		off_t fsize;
++
++		ctl->nregfiles++;
++		if (ctl->verbose > 1)
++			printf("%s\n", name);
++
++		fd = open(name, O_RDONLY);
++		if (fd < 0)
++			return;
++
++		if ((size_t)st.st_size < sizeof(buf)) {
++			cksumsize = st.st_size;
++			memset(((char *)buf) + cksumsize, 0,
++			       (sizeof(buf) - cksumsize) % sizeof(buf[0]));
++		}
++		if (read(fd, buf, cksumsize) != cksumsize) {
++			close(fd);
++			return;
++		}
++		cksumsize = (cksumsize + sizeof(buf[0]) - 1) / sizeof(buf[0]);
++		for (i = 0, cksum = 0; i < cksumsize; i++) {
++			if (cksum + buf[i] < cksum)
++				cksum += buf[i] + 1;
++			else
++				cksum += buf[i];
++		}
++		for (hp = ctl->hps[hsh]; hp; hp = hp->next) {
++			if (hp->size == st.st_size && hp->mtime == mtime)
++				break;
++		}
++		if (!hp) {
++			hp = xmalloc(sizeof(*hp));
++			hp->size = st.st_size;
++			hp->mtime = mtime;
++			hp->chain = NULL;
++			hp->next = ctl->hps[hsh];
++			ctl->hps[hsh] = hp;
++		}
++		for (fp = hp->chain; fp; fp = fp->next) {
++			if (fp->cksum == cksum)
++				break;
++		}
++		for (fp2 = fp; fp2 && fp2->cksum == cksum; fp2 = fp2->next) {
++			if (fp2->ino == st.st_ino && fp2->dev == st.st_dev) {
++				close(fd);
++				return;
++			}
++		}
++		for (fp2 = fp; fp2 && fp2->cksum == cksum; fp2 = fp2->next) {
++
++			if (!lstat(fp2->name, &st2) && S_ISREG(st2.st_mode) &&
++			    !stcmp(&st, &st2, ctl->content_only) &&
++			    st2.st_ino != st.st_ino &&
++			    st2.st_dev == st.st_dev) {
++
++				int fd2 = open(fp2->name, O_RDONLY);
++				if (fd2 < 0)
++					continue;
++
++				if (fstat(fd2, &st2) || !S_ISREG(st2.st_mode)
++				    || st2.st_size == 0) {
++					close(fd2);
++					continue;
++				}
++				ctl->ncomp++;
++				lseek(fd, 0, SEEK_SET);
++
++				for (fsize = st.st_size; fsize > 0;
++				     fsize -= (off_t)sizeof(ctl->iobuf1)) {
++					ssize_t xsz;
++					ssize_t rsize = fsize > (ssize_t) sizeof(ctl->iobuf1) ?
++							(ssize_t) sizeof(ctl->iobuf1) : fsize;
++
++					if ((xsz = read(fd, ctl->iobuf1, rsize)) != rsize)
++						warn(_("cannot read %s"), name);
++					else if ((xsz = read(fd2, ctl->iobuf2, rsize)) != rsize)
++						warn(_("cannot read %s"), fp2->name);
++
++					if (xsz != rsize) {
++						close(fd);
++						close(fd2);
++						return;
++					}
++					if (memcmp(ctl->iobuf1, ctl->iobuf2, rsize))
++						break;
++				}
++				close(fd2);
++				if (fsize > 0)
++					continue;
++				if (lstat(name, &st3)) {
++					warn(_("cannot stat %s"), name);
++					close(fd);
++					return;
++				}
++				st3.st_atime = st.st_atime;
++				if (stcmp(&st, &st3, 0)) {
++					warnx(_("file %s changed underneath us"), name);
++					close(fd);
++					return;
++				}
++				n1 = fp2->name;
++				n2 = name;
++
++				if (!ctl->no_link) {
++					const char *suffix =
++					    ".$$$___cleanit___$$$";
++					const size_t suffixlen = strlen(suffix);
++					size_t n2len = strlen(n2);
++					struct hardlink_dynstr nam2 = { NULL, 0 };
++
++					growstr(&nam2, add2(n2len, suffixlen));
++					memcpy(nam2.buf, n2, n2len);
++					memcpy(&nam2.buf[n2len], suffix,
++					       suffixlen + 1);
++					/* First create a temporary link to n1 under a new name */
++					if (link(n1, nam2.buf)) {
++						warn(_("failed to hardlink %s to %s (create temporary link as %s failed)"),
++							n1, n2, nam2.buf);
++						free(nam2.buf);
++						continue;
++					}
++					/* Then rename into place over the existing n2 */
++					if (rename(nam2.buf, n2)) {
++						warn(_("failed to hardlink %s to %s (rename temporary link to %s failed)"),
++							n1, n2, n2);
++						/* Something went wrong, try to remove the now redundant temporary link */
++						if (unlink(nam2.buf))
++							warn(_("failed to remove temporary link %s"), nam2.buf);
++						free(nam2.buf);
++						continue;
++					}
++					free(nam2.buf);
++				}
++				ctl->nlinks++;
++				if (st3.st_nlink > 1) {
++					/* We actually did not save anything this time, since the link second argument
++					   had some other links as well.  */
++					if (ctl->verbose > 1)
++						printf(_(" %s %s to %s\n"),
++							(ctl->no_link ? _("Would link") : _("Linked")),
++							n1, n2);
++				} else {
++					ctl->nsaved += ((st.st_size + 4095) / 4096) * 4096;
++					if (ctl->verbose > 1)
++						printf(_(" %s %s to %s, %s %jd\n"),
++							(ctl->no_link ? _("Would link") : _("Linked")),
++							n1, n2,
++							(ctl->no_link ? _("would save") : _("saved")),
++							(intmax_t)st.st_size);
++				}
++				close(fd);
++				return;
++			}
++		}
++		fp2 = xmalloc(add3(sizeof(*fp2), namelen, 1));
++		close(fd);
++		fp2->ino = st.st_ino;
++		fp2->dev = st.st_dev;
++		fp2->cksum = cksum;
++		memcpy(fp2->name, name, namelen + 1);
++
++		if (fp) {
++			fp2->next = fp->next;
++			fp->next = fp2;
++		} else {
++			fp2->next = hp->chain;
++			hp->chain = fp2;
++		}
++		return;
++	}
++}
++
++int main(int argc, char **argv)
++{
++	int ch;
++	int i;
++#ifdef HAVE_PCRE
++	int errornumber;
++	PCRE2_SIZE erroroffset;
++	pcre2_code *re = NULL;
++	PCRE2_SPTR exclude_pattern = NULL;
++	pcre2_match_data *match_data = NULL;
++#endif
++	struct hardlink_dynstr nam1 = { NULL, 0 };
++	struct hardlink_ctl *ctl = &global_ctl;
++
++	static const struct option longopts[] = {
++		{ "content",    no_argument, NULL, 'c' },
++		{ "dry-run",    no_argument, NULL, 'n' },
++		{ "exclude",    required_argument, NULL, 'x' },
++		{ "force",      no_argument, NULL, 'f' },
++		{ "help",       no_argument, NULL, 'h' },
++		{ "verbose",    no_argument, NULL, 'v' },
++		{ "version",    no_argument, NULL, 'V' },
++		{ NULL, 0, NULL, 0 },
++	};
++
++	setlocale(LC_ALL, "");
++	bindtextdomain(PACKAGE, LOCALEDIR);
++	textdomain(PACKAGE);
++	close_stdout_atexit();
++
++	while ((ch = getopt_long(argc, argv, "cnvfx:Vh", longopts, NULL)) != -1) {
++		switch (ch) {
++		case 'n':
++			ctl->no_link = 1;
++			break;
++		case 'v':
++			ctl->verbose++;
++			break;
++		case 'c':
++			ctl->content_only = 1;
++			break;
++		case 'f':
++			ctl->force = 1;
++			break;
++		case 'x':
++#ifdef HAVE_PCRE
++			exclude_pattern = (PCRE2_SPTR) optarg;
++#else
++			errx(EXIT_FAILURE,
++			     _("option --exclude not supported (built without pcre2)"));
++#endif
++			break;
++		case 'V':
++			print_version(EXIT_SUCCESS);
++		case 'h':
++			usage();
++		default:
++			errtryhelp(EXIT_FAILURE);
++		}
++	}
++
++	if (optind == argc) {
++		warnx(_("no directory specified"));
++		errtryhelp(EXIT_FAILURE);
++	}
++
++#ifdef HAVE_PCRE
++	if (exclude_pattern) {
++		re = pcre2_compile(exclude_pattern, /* the pattern */
++				   PCRE2_ZERO_TERMINATED, /* indicates pattern is zero-terminate */
++				   0, /* default options */
++				   &errornumber, &erroroffset, NULL); /* use default compile context */
++		if (!re) {
++			PCRE2_UCHAR buffer[256];
++			pcre2_get_error_message(errornumber, buffer,
++						sizeof(buffer));
++			errx(EXIT_FAILURE, _("pattern error at offset %d: %s"),
++				(int)erroroffset, buffer);
++		}
++		match_data = pcre2_match_data_create_from_pattern(re, NULL);
++	}
++#endif
++	atexit(print_summary);
++
++	for (i = optind; i < argc; i++)
++		process_path(ctl, argv[i]);
++
++	while (ctl->dirs) {
++		DIR *dh;
++		struct dirent *di;
++		struct hardlink_dir *dp = ctl->dirs;
++		size_t nam1baselen = strlen(dp->name);
++
++		ctl->dirs = dp->next;
++		growstr(&nam1, add2(nam1baselen, 1));
++		memcpy(nam1.buf, dp->name, nam1baselen);
++		free(dp);
++		nam1.buf[nam1baselen++] = '/';
++		nam1.buf[nam1baselen] = 0;
++		dh = opendir(nam1.buf);
++
++		if (dh == NULL)
++			continue;
++		ctl->ndirs++;
++
++		while ((di = readdir(dh)) != NULL) {
++			if (!di->d_name[0])
++				continue;
++			if (di->d_name[0] == '.') {
++				if (!di->d_name[1] || !strcmp(di->d_name, ".."))
++					continue;
++			}
++#ifdef HAVE_PCRE
++			if (re && pcre2_match(re, /* compiled regex */
++					      (PCRE2_SPTR) di->d_name, strlen(di->d_name), 0, /* start at offset 0 */
++					      0, /* default options */
++					      match_data, /* block for storing the result */
++					      NULL) /* use default match context */
++			    >=0) {
++				if (ctl->verbose) {
++					nam1.buf[nam1baselen] = 0;
++					printf(_("Skipping %s%s\n"), nam1.buf, di->d_name);
++				}
++				continue;
++			}
++#endif
++			{
++				size_t subdirlen;
++				growstr(&nam1,
++					add2(nam1baselen, subdirlen =
++					     strlen(di->d_name)));
++				memcpy(&nam1.buf[nam1baselen], di->d_name,
++				       add2(subdirlen, 1));
++			}
++			process_path(ctl, nam1.buf);
++		}
++		closedir(dh);
++	}
++
++	return 0;
++}
+diff --git a/locale/programs/xalloc.h b/locale/programs/xalloc.h
+new file mode 100644
+index 0000000000..0129a85e2e
+--- /dev/null
++++ b/locale/programs/xalloc.h
+@@ -0,0 +1,129 @@
++/*
++ * Copyright (C) 2010 Davidlohr Bueso <dave@gnu.org>
++ *
++ * This file may be redistributed under the terms of the
++ * GNU Lesser General Public License.
++ *
++ * General memory allocation wrappers for malloc, realloc, calloc and strdup
++ */
++
++#ifndef UTIL_LINUX_XALLOC_H
++#define UTIL_LINUX_XALLOC_H
++
++#include <stdlib.h>
++#include <string.h>
++
++#include "c.h"
++
++#ifndef XALLOC_EXIT_CODE
++# define XALLOC_EXIT_CODE EXIT_FAILURE
++#endif
++
++static inline void __attribute__((__noreturn__))
++__err_oom(const char *file, unsigned int line)
++{
++	err(XALLOC_EXIT_CODE, "%s: %u: cannot allocate memory", file, line);
++}
++
++#define err_oom()	__err_oom(__FILE__, __LINE__)
++
++static inline __ul_alloc_size(1) __ul_returns_nonnull
++void *xmalloc(const size_t size)
++{
++        void *ret = malloc(size);
++
++        if (!ret && size)
++                err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size);
++        return ret;
++}
++
++static inline __ul_alloc_size(2) __ul_returns_nonnull
++void *xrealloc(void *ptr, const size_t size)
++{
++        void *ret = realloc(ptr, size);
++
++        if (!ret && size)
++                err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size);
++        return ret;
++}
++
++static inline __ul_calloc_size(1, 2) __ul_returns_nonnull
++void *xcalloc(const size_t nelems, const size_t size)
++{
++        void *ret = calloc(nelems, size);
++
++        if (!ret && size && nelems)
++                err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size);
++        return ret;
++}
++
++static inline char __attribute__((warn_unused_result)) __ul_returns_nonnull
++*xstrdup(const char *str)
++{
++        char *ret;
++
++        if (!str)
++                return NULL;
++
++        ret = strdup(str);
++
++        if (!ret)
++                err(XALLOC_EXIT_CODE, "cannot duplicate string");
++        return ret;
++}
++
++static inline char * __attribute__((warn_unused_result)) __ul_returns_nonnull
++xstrndup(const char *str, size_t size)
++{
++        char *ret;
++
++        if (!str)
++                return NULL;
++
++        ret = strndup(str, size);
++
++        if (!ret)
++                err(XALLOC_EXIT_CODE, "cannot duplicate string");
++        return ret;
++}
++
++
++static inline int __attribute__ ((__format__(printf, 2, 3)))
++    xasprintf(char **strp, const char *fmt, ...)
++{
++	int ret;
++	va_list args;
++	va_start(args, fmt);
++	ret = vasprintf(&(*strp), fmt, args);
++	va_end(args);
++	if (ret < 0)
++		err(XALLOC_EXIT_CODE, "cannot allocate string");
++	return ret;
++}
++
++static inline int  __attribute__ ((__format__(printf, 2, 0)))
++xvasprintf(char **strp, const char *fmt, va_list ap)
++{
++	int ret = vasprintf(&(*strp), fmt, ap);
++	if (ret < 0)
++		err(XALLOC_EXIT_CODE, "cannot allocate string");
++	return ret;
++}
++
++
++static inline char * __attribute__((warn_unused_result)) xgethostname(void)
++{
++	char *name;
++	size_t sz = get_hostname_max() + 1;
++
++	name = xmalloc(sizeof(char) * sz);
++
++	if (gethostname(name, sz) != 0) {
++		free(name);
++		return NULL;
++	}
++	name[sz - 1] = '\0';
++	return name;
++}
++
++#endif