-# onceonly.m4 serial 5 (gettext-0.15)
-dnl Copyright (C) 2002-2003, 2006 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.
+# onceonly.m4 serial 9
+dnl Copyright (C) 2002-2003, 2005-2006, 2008-2013 Free Software Foundation,
+dnl Inc.
+dnl
+dnl This file is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3 of the License, or
+dnl (at your option) any later version.
+dnl
+dnl This file is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+dnl GNU General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl along with this file. If not, see <http://www.gnu.org/licenses/>.
+dnl
+dnl As a special exception to the GNU General Public License,
+dnl 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 empty, and the check will be inserted before the body of the AC_DEFUNed
dnl function.
-dnl This file is only needed in autoconf <= 2.59. Newer versions of autoconf
-dnl have this macro built-in. But about AC_CHECK_DECLS_ONCE: note that in
-dnl autoconf >= 2.60 the symbol separator is a comma, whereas here it is
-dnl whitespace.
+dnl The original code implemented AC_CHECK_HEADERS_ONCE and AC_CHECK_FUNCS_ONCE
+dnl in terms of AC_DEFUN and AC_REQUIRE. This implementation uses diversions to
+dnl named sections DEFAULTS and INIT_PREPARE in order to check all requested
+dnl headers at once, thus reducing the size of 'configure'. It is known to work
+dnl with autoconf 2.57..2.62 at least . The size reduction is ca. 9%.
-dnl Autoconf version 2.57 or newer is recommended.
-AC_PREREQ(2.54)
+dnl Autoconf version 2.59 plus gnulib is required; this file is not needed
+dnl with Autoconf 2.60 or greater. But note that autoconf's implementation of
+dnl AC_CHECK_DECLS_ONCE expects a comma-separated list of symbols as first
+dnl argument!
+AC_PREREQ([2.59])
# 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(m4_defn([gl_HEADER_NAME]),
- [-./], [___])), [
- AC_CHECK_HEADERS(gl_HEADER_NAME)
+ m4_foreach_w([gl_HEADER_NAME], [$1], [
+ AC_DEFUN([gl_CHECK_HEADER_]m4_quote(m4_translit(gl_HEADER_NAME,
+ [./-], [___])), [
+ m4_divert_text([INIT_PREPARE],
+ [gl_header_list="$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,
- [-./], [___])))
+ AC_REQUIRE([gl_CHECK_HEADER_]m4_quote(m4_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], [
+ m4_foreach_w([gl_FUNC_NAME], [$1], [
AC_DEFUN([gl_CHECK_FUNC_]m4_defn([gl_FUNC_NAME]), [
- AC_CHECK_FUNCS(m4_defn([gl_FUNC_NAME]))
+ m4_divert_text([INIT_PREPARE],
+ [gl_func_list="$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], [
+ m4_foreach_w([gl_DECL_NAME], [$1], [
AC_DEFUN([gl_CHECK_DECL_]m4_defn([gl_DECL_NAME]), [
AC_CHECK_DECLS(m4_defn([gl_DECL_NAME]))
])
projects / gnulib.git / blobdiff