Avoid some Autoconf "was expanded before it was required" warnings

[Bruno Haible]

Building some testdir, I see this Autoconf warning:

executing autoconf
configure.ac:785: warning: AC_REQUIRE: `gt_LOCALE_FR_UTF8' was expanded before 
it was required
configure.ac:785: 
https://www.gnu.org/software/autoconf/manual/autoconf.html#Expanded-Before-Required
configure.ac:34: gl_INIT is expanded from...
configure.ac:785: the top level

The cause is that the *-tests modules invoke gt_LOCALE_FR_UTF8, whereas
elsewhere in some places it AC_REQUIREd.

This patch fixes it.


2023-04-22  Bruno Haible  <bruno@clisp.org>

        Avoid some Autoconf "was expanded before it was required" warnings.
        * m4/locale-ar.m4 (gt_LOCALE_AR): Define through AC_DEFUN_ONCE.
        * m4/locale-fr.m4 (gt_LOCALE_FR, gt_LOCALE_FR_UTF8): Likewise.
        * m4/locale-ja.m4 (gt_LOCALE_JA): Likewise.
        * m4/locale-tr.m4 (gt_LOCALE_TR_UTF8): Likewise.
        * m4/locale-zh.m4 (gt_LOCALE_ZH_CN): Likewise.

diff --git a/m4/locale-ar.m4 b/m4/locale-ar.m4
index 7b696f480f..3c3342db08 100644
--- a/m4/locale-ar.m4
+++ b/m4/locale-ar.m4
@@ -1,4 +1,4 @@
-# locale-ar.m4 serial 9
+# locale-ar.m4 serial 10
 dnl Copyright (C) 2003, 2005-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,7 +7,7 @@
 dnl From Ben Pfaff, based on locale-fr.m4 by Bruno Haible.
 
 dnl Determine the name of an Arabic locale with traditional encoding.
-AC_DEFUN([gt_LOCALE_AR],
+AC_DEFUN_ONCE([gt_LOCALE_AR],
 [
   AC_REQUIRE([AC_CANONICAL_HOST])
   AC_REQUIRE([AM_LANGINFO_CODESET])
diff --git a/m4/locale-fr.m4 b/m4/locale-fr.m4
index 8c41fadfe8..5e13f3945d 100644
--- a/m4/locale-fr.m4
+++ b/m4/locale-fr.m4
@@ -1,4 +1,4 @@
-# locale-fr.m4 serial 20
+# locale-fr.m4 serial 21
 dnl Copyright (C) 2003, 2005-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,7 +7,7 @@
 dnl From Bruno Haible.
 
 dnl Determine the name of a french locale with traditional encoding.
-AC_DEFUN([gt_LOCALE_FR],
+AC_DEFUN_ONCE([gt_LOCALE_FR],
 [
   AC_REQUIRE([AC_CANONICAL_HOST])
   AC_REQUIRE([AM_LANGINFO_CODESET])
@@ -137,7 +137,7 @@ AC_DEFUN([gt_LOCALE_FR]
 ])
 
 dnl Determine the name of a french locale with UTF-8 encoding.
-AC_DEFUN([gt_LOCALE_FR_UTF8],
+AC_DEFUN_ONCE([gt_LOCALE_FR_UTF8],
 [
   AC_REQUIRE([AM_LANGINFO_CODESET])
   AC_CACHE_CHECK([for a french Unicode locale], [gt_cv_locale_fr_utf8], [
diff --git a/m4/locale-ja.m4 b/m4/locale-ja.m4
index 2590173052..f6ca327b94 100644
--- a/m4/locale-ja.m4
+++ b/m4/locale-ja.m4
@@ -1,4 +1,4 @@
-# locale-ja.m4 serial 15
+# locale-ja.m4 serial 16
 dnl Copyright (C) 2003, 2005-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,7 +7,7 @@
 dnl From Bruno Haible.
 
 dnl Determine the name of a japanese locale with EUC-JP encoding.
-AC_DEFUN([gt_LOCALE_JA],
+AC_DEFUN_ONCE([gt_LOCALE_JA],
 [
   AC_REQUIRE([AC_CANONICAL_HOST])
   AC_REQUIRE([AM_LANGINFO_CODESET])
diff --git a/m4/locale-tr.m4 b/m4/locale-tr.m4
index 847fb0da7c..d34df057d1 100644
--- a/m4/locale-tr.m4
+++ b/m4/locale-tr.m4
@@ -1,4 +1,4 @@
-# locale-tr.m4 serial 13
+# locale-tr.m4 serial 14
 dnl Copyright (C) 2003, 2005-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,7 +7,7 @@
 dnl From Bruno Haible.
 
 dnl Determine the name of a turkish locale with UTF-8 encoding.
-AC_DEFUN([gt_LOCALE_TR_UTF8],
+AC_DEFUN_ONCE([gt_LOCALE_TR_UTF8],
 [
   AC_REQUIRE([AC_CANONICAL_HOST])
   AC_REQUIRE([AM_LANGINFO_CODESET])
diff --git a/m4/locale-zh.m4 b/m4/locale-zh.m4
index b9f9eef724..94c545906f 100644
--- a/m4/locale-zh.m4
+++ b/m4/locale-zh.m4
@@ -1,4 +1,4 @@
-# locale-zh.m4 serial 15
+# locale-zh.m4 serial 16
 dnl Copyright (C) 2003, 2005-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,7 +7,7 @@
 dnl From Bruno Haible.
 
 dnl Determine the name of a chinese locale with GB18030 encoding.
-AC_DEFUN([gt_LOCALE_ZH_CN],
+AC_DEFUN_ONCE([gt_LOCALE_ZH_CN],
 [
   AC_REQUIRE([AC_CANONICAL_HOST])
   AC_REQUIRE([AM_LANGINFO_CODESET])