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diff --git a/m4/non-recursive-gnulib-prefix-hack.m4 b/m4/non-recursive-gnulib-prefix-hack.m4
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+dnl Copyright (C) 2012-2018 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 gl_NON_RECURSIVE_GNULIB_PREFIX_HACK LIB_DIR
+dnl Adjust configure-set $gl_LIBOBJS and each AC_SUBST'd *_H variable
+dnl with a value ending in ".h" to reflect that these files are located
+dnl in the directory specified by LIB_DIR.
+AC_DEFUN([gl_NON_RECURSIVE_GNULIB_PREFIX_HACK],
+[
+  # Tell AC_LIBSOURCES where to find source files like alloca.c.
+  AC_CONFIG_LIBOBJ_DIR([$1])
+
+  # This hack originated in bison.  It is required when using non-recursive
+  # automake rules to build from gnulib-provided lib/ sources.  Hence, LIB_DIR
+  # is usually simply "lib".  Those rules use the list of names like "fchdir.o"
+  # and "strstr.o" in gl_LIBOBJS.  With non-recursive make, we must prefix each
+  # such file name with the "lib/" prefix.  See also build-aux/prefix-gnulib-mk.
+  gl_LIBOBJS=`echo "$gl_LIBOBJS" | sed -e 's, , $1/,g'`
+
+  # Listing the names of the variables to prefix is error-prone.
+  # Rather, adjust each AC_SUBST'd variable whose name ends in '_H'
+  # and whose value ends in '.h'.
+  for ac_var in $ac_subst_vars
+  do
+    eval "ac_val=\$$ac_var"
+    case $ac_var:$ac_val in
+      *_H:*.h) eval "$ac_var=$1/\$$ac_var";;
+    esac
+  done
+])