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diff --git a/gnulib-m4/relocatable-lib.m4 b/gnulib-m4/relocatable-lib.m4
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+# relocatable-lib.m4 serial 4
+dnl Copyright (C) 2003, 2005-2007, 2009 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+
+dnl Support for relocatable libraries.
+AC_DEFUN([gl_RELOCATABLE_LIBRARY],
+[
+  AC_REQUIRE([gl_RELOCATABLE_LIBRARY_BODY])
+  if test $RELOCATABLE = yes; then
+    AC_LIBOBJ([relocatable])
+  fi
+])
+AC_DEFUN([gl_RELOCATABLE_LIBRARY_BODY],
+[
+  AC_REQUIRE([gl_RELOCATABLE_NOP])
+  dnl Easier to put this here once, instead of into the DEFS of each Makefile.
+  if test "X$prefix" = "XNONE"; then
+    reloc_final_prefix="$ac_default_prefix"
+  else
+    reloc_final_prefix="$prefix"
+  fi
+  AC_DEFINE_UNQUOTED([INSTALLPREFIX], ["${reloc_final_prefix}"],
+    [Define to the value of ${prefix}, as a string.])
+  if test $RELOCATABLE = yes; then
+    AC_DEFINE([ENABLE_RELOCATABLE], [1],
+      [Define to 1 if the package shall run at any location in the filesystem.])
+  fi
+])
+
+dnl Like gl_RELOCATABLE_LIBRARY, except prepare for separate compilation
+dnl (no AC_LIBOBJ).
+AC_DEFUN([gl_RELOCATABLE_LIBRARY_SEPARATE],
+[
+  AC_REQUIRE([gl_RELOCATABLE_LIBRARY_BODY])
+])
+
+dnl Support for relocatable packages for which it is a nop.
+AC_DEFUN([gl_RELOCATABLE_NOP],
+[
+  AC_MSG_CHECKING([whether to activate relocatable installation])
+  AC_ARG_ENABLE([relocatable],
+    [  --enable-relocatable    install a package that can be moved in the filesystem],
+    [if test "$enableval" != no; then
+       RELOCATABLE=yes
+     else
+       RELOCATABLE=no
+     fi
+    ], RELOCATABLE=no)
+  AC_SUBST([RELOCATABLE])
+  AC_MSG_RESULT([$RELOCATABLE])
+])
+