diff --git a/.gitignore b/.gitignore
index a8dca34..62b0a82 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,6 @@
 /wdiff-1.2.1.tar.gz
 /wdiff-1.2.2.tar.gz
 /wdiff-1.2.2.tar.gz.sig
+/wdiff-1.2.3.tar.gz
+/wdiff-1.2.3.tar.gz.sig
+/gnu-keyring.gpg
diff --git a/gnu-keyring.gpg b/gnu-keyring.gpg
deleted file mode 100644
index 8f4e2bc..0000000
Binary files a/gnu-keyring.gpg and /dev/null differ
diff --git a/sources b/sources
index 7f3e0eb..4a1d142 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,3 @@
-SHA512 (wdiff-1.2.2.tar.gz) = 9272c225f4f61612197fe151cf8c913107169ac9fcd6c9f8472a0f56d9124d78a060944cea1b51489ca34311220f23638d043d43c733a3252cdbb7cceb1085ed
-SHA512 (wdiff-1.2.2.tar.gz.sig) = 72db186b8d4ac1c81bdfb790cf08e82fd994938290f383756c683e68d0f4371c961f8e0b935b0cb1cc3947d4820b9d7a3e6f91a61e0570c9468d7da29d14ec7f
+SHA512 (wdiff-1.2.3.tar.gz) = 5a5b004fe6fc4fdd90f85ddbc5b751b682224da83efc5fe90fbe7cdb0bc0f0e0fdd0e25c5e70223d738c280bb537cb88dee29599d1c33d9d10c491f56034a06d
+SHA512 (wdiff-1.2.3.tar.gz.sig) = 6e8da9844734728cd38081a26af1a04d8881ef95a52263af308b442888985a6bf6ff1e7265deca41b6897f567173ea89836f73b002e0bb623284870bf7a69ffe
+SHA512 (gnu-keyring.gpg) = 0860d845851d2216b7c99bfe9c8aa5c1883f5ec54153c40daba5295db46bc7a4fb15fb8954d8675324255a0c67e77589e83a13c9f70f9aac81fbf55a32231c85
diff --git a/wdiff.spec b/wdiff.spec
index b753232..7510c08 100644
--- a/wdiff.spec
+++ b/wdiff.spec
@@ -1,23 +1,126 @@
 %bcond rebuild_mans 1
+# As of 1.2.3, cannot autoreconf due to:
+# configure:14538: error: undefined or overquoted macro: gl_PTHREADLIB
+# configure:14651: error: undefined or overquoted macro: gl_WEAK_SYMBOLS
+# configure:15859: error: undefined or overquoted macro: gl_TYPE_WINT_T_PREREQ
+%bcond autoreconf 0
 
 Name:           wdiff
-Version:        1.2.2
+Version:        1.2.3
 Release:        %autorelease
 Summary:        Compare files on a word per word basis
 
-# Entire source is GPL-3.0-or-later, except wdiff.texi and the documentation
-# built from it, including info, HTML, and PDF documentation, which is Latex2e.
-License:        GPL-3.0-or-later AND Latex2e
-URL:            https://www.gnu.org/software/wdiff/
+# Entire source is GPL-3.0-or-later, except:
+#
+# Latex2e:
+#   wdiff.texi and the documentation built from it, including info, HTML, and
+#     PDF documentation, to include doc/wdiff.info in the source tree.
+# LGPL-2.0-or-later:
+#     lib/_Noreturn.h
+#     lib/arg-nonnull.h
+#     lib/c++defs.h
+#     lib/warn-on-use.h
+# LGPL-2.1-or-later:
+#   the entire contents of lib/, except:
+#     - those listed as LGPL-2.0-or-later, above
+#     - lib/Makefile.{am,in}, which are build-system files and are documented
+#       above SourceLicense, and
+#     - the following, which are GPL-3.0-or-later:
+#       lib/xalloc-die.c lib/xalloc.h lib/xmalloc.c
+#   lib/*/*.*
+License:        %{shrink:
+    GPL-3.0-or-later AND
+    LGPL-2.0-or-later AND
+    LGPL-2.1-or-later AND
+    Latex2e
+    }
+# Additionally, build-system files do not contribute to the licenses of the
+# binary RPMs, and some of these are under other licenses:
+#
+# FSFAP:
+#   AUTHORS
+#   config.h.in (inasmuch as it is derived from configure.ac, which is
+#     explicitly so licensed)
+#   configure.ac
+#   INSTALL
+#   Makefile.am
+#   README
+#   THANKS
+#   TODO
+#   doc/Makefile.am
+#   man/Makefile.am
+#   po/POTFILES.in
+#   src/Makefile.am
+# FSFAP AND FSFULLRWD: (Each is documented as FSFULLRWD, but derived from a
+#     corresponding Makefile.am that is FSFAP.)
+#   Makefile.in
+#   doc/Makefile.in
+#   man/Makefile.in
+#   src/Makefile.in
+# FSFAP-no-warranty-disclaimer:
+#   configure
+#   build-aux/config.rpath
+# FSFUL:
+#   tests/testsuite
+# FSFULLR AND FSFULLRWD:
+#   aclocal.m4
+# FSFULLRWD AND GPL-3.0-or-later WITH Autoconf-exception-generic:
+#   lib/Makefile.in
+# FSFULLRWD:
+#   m4/*, except:
+#     - m4/gnulib-cache.m4
+#     - m4/gnulib-comp.m4
+#     - m4/init-package-version.m4
+# GPL-2.0-or-later:
+#   build-aux/gnupload
+# GPL-2.0-or-later WITH Autoconf-exception-generic:
+#   build-aux/compile
+#   build-aux/depcomp
+#   build-aux/mdate-sh
+#   build-aux/missing
+#   m4/init-package-version.m4
+# GPL-3.0-or-later WITH Autoconf-exception-generic:
+#   lib/Makefile.am
+#   m4/gnulib-cache.m4
+#   m4/gnulib-comp.m4
+# GPL-3.0-or-later WITH Autoconf-exception-generic-3.0:
+#   build-aux/config.guess
+#   build-aux/config.sub
+# GPL-3.0-or-later WITH Texinfo-exception:
+#   build-aux/texinfo.tex
+# X11 AND LicenseRef-Fedora-Public-Domain:
+#   build-aux/install (“FSF changes to this file are in the public domain.”)
+SourceLicense:  %{shrink:
+    %{license} AND
+    FSFAP AND
+    FSFAP-no-warranty-disclaimer AND
+    FSFUL AND
+    FSFULLR AND
+    FSFULLRWD AND
+    GPL-2.0-or-later AND
+    GPL-2.0-or-later WITH Autoconf-exception-generic AND
+    GPL-3.0-or-later WITH Autoconf-exception-generic AND
+    GPL-3.0-or-later WITH Autoconf-exception-generic-3.0 AND
+    GPL-3.0-or-later WITH Texinfo-exception AND
+    LicenseRef-Fedora-Public-Domain AND
+    X11
+    }
+URL:            https://www.gnu.org/software/wdiff
 Source0:        https://ftp.gnu.org/gnu/wdiff/wdiff-%{version}.tar.gz
 Source1:        https://ftp.gnu.org/gnu/wdiff/wdiff-%{version}.tar.gz.sig
+# Fetched 2026-08-13:
 Source2:        https://ftp.gnu.org/gnu/gnu-keyring.gpg
 
+# https://fedoraproject.org/wiki/Changes/EncourageI686LeafRemoval
+ExcludeArch:    %{ix86}
+
 BuildRequires:  gcc
 BuildRequires:  make
+%if %{with autoreconf}
 BuildRequires:  automake
 BuildRequires:  autoconf
 BuildRequires:  libtool  
+%endif
 
 BuildRequires:  gettext-devel
 BuildRequires:  ncurses-devel
@@ -27,10 +130,11 @@ BuildRequires:  texinfo
 BuildRequires:  texinfo-tex
 BuildRequires:  tex(latex)
 
-BuildRequires:  gnupg2
+BuildRequires:  gpgverify
 
-#https://fedorahosted.org/fpc/ticket/174
-Provides: bundled(gnulib) = 30.5.2012
+# https://fedorahosted.org/fpc/ticket/174
+# Unclear which version of gnulib is currently bundled.
+Provides: bundled(gnulib)
 
 %description
 The GNU wdiff program is a front end to diff for comparing files on a word per
@@ -43,48 +147,37 @@ produce a nicer display of word differences between the original files.
 
 %prep
 %{gpgverify} --keyring='%{SOURCE2}' --signature='%{SOURCE1}' --data='%{SOURCE0}'
-%setup -q
+%autosetup -p1
 
-# Fix ISO-8859-1-encoded files
-for fn in BACKLOG ChangeLog
-do
-  iconv --from=ISO-8859-1 --to=UTF-8 "${fn}" > "${fn}.iconv"
-  touch -r "${fn}" "${fn}.iconv"
-  chmod -v --reference="${fn}" "${fn}.iconv"
-  mv -f "${fn}.iconv" "${fn}"
-done
+
+%conf
+%if %{with autoreconf}
+autoreconf --force --install --verbose
+%endif
+%configure --enable-experimental="mdiff wdiff2 unify" 
 
 
 %build
-autoreconf -fiv
-%configure --enable-experimental="mdiff wdiff2 unify" 
 %make_build all
 
 %if %{with rebuild_mans}
-rm -v man/mdiff.1 man/wdiff.1 man/wdiff2.1 man/unify.1
-%make_build -C man mdiff.1 wdiff.1 wdiff2.1 unify.1
+rm --verbose man/mdiff.1 man/wdiff.1 man/wdiff2.1 man/unify.1
+%make_build --directory=man mdiff.1 wdiff.1 wdiff2.1 unify.1
 %endif
 
 # Make sure we rebuild the info page too.
-rm -v doc/wdiff.info
-%make_build -C doc info html pdf
+rm --verbose doc/wdiff.info
+%make_build --directory=doc info html pdf
 
 
 %install
 %make_install
 find '%{buildroot}' -type f -name '*gnulib.mo' -print -delete
 rm '%{buildroot}%{_infodir}/dir'
-install -d '%{buildroot}%{_pkgdocdir}'
-install -t '%{buildroot}%{_pkgdocdir}' -p -m 0644 \
-    ABOUT-NLS \
-    AUTHORS \
-    BACKLOG \
-    ChangeLog \
-    NEWS \
-    README \
-    THANKS \
-    TODO
-cp -rp doc/wdiff.html %{buildroot}%{_pkgdocdir}/html
+install --directory '%{buildroot}%{_pkgdocdir}'
+install --preserve-timestamp --mode=0644 --target='%{buildroot}%{_pkgdocdir}' \
+    ABOUT-NLS AUTHORS BACKLOG ChangeLog NEWS README THANKS TODO
+cp --recursive --preserve doc/wdiff.html '%{buildroot}%{_pkgdocdir}/html'
 
 %find_lang wdiff