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diff --git a/gl/m4/onceonly_2_57.m4 b/gl/m4/onceonly_2_57.m4
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-# onceonly_2_57.m4 serial 3
-dnl Copyright (C) 2002-2003 Free Software Foundation, Inc.
-dnl This file is free software, distributed under the terms of the GNU
-dnl General Public License. As a special exception to the GNU General
-dnl Public License, this file may be distributed as part of a program
-dnl that contains a configuration script generated by Autoconf, under
-dnl the same distribution terms as the rest of that program.
-
-dnl This file defines some "once only" variants of standard autoconf macros.
-dnl AC_CHECK_HEADERS_ONCE like AC_CHECK_HEADERS
-dnl AC_CHECK_FUNCS_ONCE like AC_CHECK_FUNCS
-dnl AC_CHECK_DECLS_ONCE like AC_CHECK_DECLS
-dnl AC_REQUIRE([AC_HEADER_STDC]) like AC_HEADER_STDC
-dnl The advantage is that the check for each of the headers/functions/decls
-dnl will be put only once into the 'configure' file. It keeps the size of
-dnl the 'configure' file down, and avoids redundant output when 'configure'
-dnl is run.
-dnl The drawback is that the checks cannot be conditionalized. If you write
-dnl if some_condition; then gl_CHECK_HEADERS(stdlib.h); fi
-dnl inside an AC_DEFUNed function, the gl_CHECK_HEADERS macro call expands to
-dnl empty, and the check will be inserted before the body of the AC_DEFUNed
-dnl function.
-
-dnl This is like onceonly.m4, except that it uses diversions to named sections
-dnl DEFAULTS and INIT_PREPARE in order to check all requested headers at once,
-dnl thus reducing the size of 'configure'. Works with autoconf-2.57. The
-dnl size reduction is ca. 9%.
-
-dnl Autoconf version 2.57 or newer is recommended.
-AC_PREREQ(2.54)
-
-# AC_CHECK_HEADERS_ONCE(HEADER1 HEADER2 ...) is a once-only variant of
-# AC_CHECK_HEADERS(HEADER1 HEADER2 ...).
-AC_DEFUN([AC_CHECK_HEADERS_ONCE], [
- :
- AC_FOREACH([gl_HEADER_NAME], [$1], [
- AC_DEFUN([gl_CHECK_HEADER_]m4_quote(translit(gl_HEADER_NAME,
- [./-], [___])), [
- m4_divert_text([INIT_PREPARE],
- [gl_header_list="$gl_header_list gl_HEADER_NAME"])
- gl_HEADERS_EXPANSION
- AH_TEMPLATE(AS_TR_CPP([HAVE_]m4_defn([gl_HEADER_NAME])),
- [Define to 1 if you have the <]m4_defn([gl_HEADER_NAME])[> header file.])
- ])
- AC_REQUIRE([gl_CHECK_HEADER_]m4_quote(translit(gl_HEADER_NAME,
- [./-], [___])))
- ])
-])
-m4_define([gl_HEADERS_EXPANSION], [
- m4_divert_text([DEFAULTS], [gl_header_list=])
- AC_CHECK_HEADERS([$gl_header_list])
- m4_define([gl_HEADERS_EXPANSION], [])
-])
-
-# AC_CHECK_FUNCS_ONCE(FUNC1 FUNC2 ...) is a once-only variant of
-# AC_CHECK_FUNCS(FUNC1 FUNC2 ...).
-AC_DEFUN([AC_CHECK_FUNCS_ONCE], [
- :
- AC_FOREACH([gl_FUNC_NAME], [$1], [
- AC_DEFUN([gl_CHECK_FUNC_]m4_defn([gl_FUNC_NAME]), [
- m4_divert_text([INIT_PREPARE],
- [gl_func_list="$gl_func_list gl_FUNC_NAME"])
- gl_FUNCS_EXPANSION
- AH_TEMPLATE(AS_TR_CPP([HAVE_]m4_defn([gl_FUNC_NAME])),
- [Define to 1 if you have the `]m4_defn([gl_FUNC_NAME])[' function.])
- ])
- AC_REQUIRE([gl_CHECK_FUNC_]m4_defn([gl_FUNC_NAME]))
- ])
-])
-m4_define([gl_FUNCS_EXPANSION], [
- m4_divert_text([DEFAULTS], [gl_func_list=])
- AC_CHECK_FUNCS([$gl_func_list])
- m4_define([gl_FUNCS_EXPANSION], [])
-])
-
-# AC_CHECK_DECLS_ONCE(DECL1 DECL2 ...) is a once-only variant of
-# AC_CHECK_DECLS(DECL1, DECL2, ...).
-AC_DEFUN([AC_CHECK_DECLS_ONCE], [
- :
- AC_FOREACH([gl_DECL_NAME], [$1], [
- AC_DEFUN([gl_CHECK_DECL_]m4_defn([gl_DECL_NAME]), [
- AC_CHECK_DECLS(m4_defn([gl_DECL_NAME]))
- ])
- AC_REQUIRE([gl_CHECK_DECL_]m4_defn([gl_DECL_NAME]))
- ])
-])