Assume Autoconf >= 2.63. * DEPENDENCIES: Mention the requirement. * gnulib-tool (DEFAULT_AUTOCONF_MINVERSION): Bump to 2.63. (func_get_filelist): Don't list m4/onceonly.m4 any more. * pygnulib/GLModuleSystem.py (getFiles): Likewise. * m4/onceonly.m4: Remove file. * m4/openmp.m4: Remove file. * modules/openmp (Files): Remove m4/openmp.m4. * m4/configmake.m4 (gl_CONFIGMAKE_PREP): Don't set datarootdir, docdir, htmldir, dvidir, pdfdir, psdir, localedir. * m4/po.m4 (AM_PO_SUBDIRS): Don't set localedir. * m4/gnulib-common.m4 (m4_foreach_w): Remove fallback for Autoconf < 2.60. (AC_PROG_MKDIR_P): Remove definition for Autoconf < 2.62. (AC_PROG_SED): Remove fallback for Autoconf < 2.60. * m4/errno_h.m4 (AC_COMPUTE_INT): Remove fallback for Autoconf < 2.61. * m4/size_max.m4 (AC_COMPUTE_INT): Likewise. * m4/stdint.m4 (AC_COMPUTE_INT): Likewise. * m4/fcntl-o.m4 (gl_FCNTL_O_FLAGS): Assume AC_USE_SYSTEM_EXTENSIONS exists. * m4/threadlib.m4 (gl_THREADLIB_EARLY_BODY): Likewise, * m4/lib-link.m4 (AC_LIB_LINKFLAGS_BODY): Remove workaround for Autoconf < 2.61. * m4/lib-prefix.m4 (AC_LIB_ARG_WITH): Remove macro. (AC_LIB_PREFIX): Use AC_ARG_WITH, assuming semantics of Autoconf >= 2.52. * m4/longlong.m4: Require Autoconf >= 2.62. Update comments. * m4/ls-mntd-fs.m4: Require Autoconf >= 2.60. Update comments. * m4/gettext.m4 (AM_GNU_GETTEXT): Update comment.

--- a/m4/po.m4	Tue Oct 23 00:06:46 2018 +0200
+++ b/m4/po.m4	Tue Oct 23 00:06:52 2018 +0200
@@ -1,4 +1,4 @@
-# po.m4 serial 25
+# po.m4 serial 24a
 dnl Copyright (C) 1995-2014, 2016, 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,
@@ -83,12 +83,6 @@
   AM_PATH_PROG_WITH_TEST(MSGMERGE, msgmerge,
     [$ac_dir/$ac_word --update -q /dev/null /dev/null >&]AS_MESSAGE_LOG_FD[ 2>&1], :)
 
-  dnl Installation directories.
-  dnl Autoconf >= 2.60 defines localedir. For older versions of autoconf, we
-  dnl have to define it here, so that it can be used in po/Makefile.
-  test -n "$localedir" || localedir='${datadir}/locale'
-  AC_SUBST([localedir])
-
   dnl Support for AM_XGETTEXT_OPTION.
   test -n "${XGETTEXT_EXTRA_OPTIONS+set}" || XGETTEXT_EXTRA_OPTIONS=
   AC_SUBST([XGETTEXT_EXTRA_OPTIONS])