see https://bugs.gentoo.org/945288
unbundle old version
this part is updated by upstream w/ https://gitlab.xiph.org/xiph/vorbis-tools/-/merge_requests/25.patch
--- a/configure.ac
+++ b/configure.ac
@@ -196,8 +196,6 @@ fi
 SHARE_LIBS='$(top_builddir)/share/libutf8.a $(top_builddir)/share/libgetopt.a'
 SHARE_CFLAGS='-I$(top_srcdir)/include'
 
-I18N_CFLAGS='-I$(top_srcdir)/intl'
-I18N_LIBS=$INTLLIBS
 
 SOCKET_LIBS=
 AC_CHECK_LIB(socket, socket, SOCKET_LIBS="-lsocket")
@@ -413,7 +413,6 @@ AC_CONFIG_FILES([
 Makefile
 m4/Makefile
 po/Makefile.in
-intl/Makefile
 include/Makefile
 share/Makefile
 win32/Makefile
--- a/Makefile.am
+++ b/Makefile.am
@@ -2,8 +2,8 @@
 
 AUTOMAKE_OPTIONS = foreign dist-zip
 
-SUBDIRS = po intl include share win32 @OPT_SUBDIRS@ tests
-DIST_SUBDIRS = po intl include share win32 ogg123 oggenc oggdec ogginfo \
+SUBDIRS = po include share win32 @OPT_SUBDIRS@ tests
+DIST_SUBDIRS = po include share win32 ogg123 oggenc oggdec ogginfo \
 	vcut vorbiscomment m4 tests
 
 EXTRA_DIST = config.rpath README AUTHORS COPYING CHANGES