(rpl_calloc): Defend against buggy calloc implementations

[gnulib.git] / m4 / onceonly.m4

diff --git a/m4/onceonly.m4 b/m4/onceonly.m4
index af56aa9..50b33f4 100644 (file)
--- a/m4/onceonly.m4
+++ b/m4/onceonly.m4
@@ -1,4 +1,4 @@
-# onceonly.m4 serial 2
+# onceonly.m4 serial 3 (gettext-0.12)
 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
@@ -21,20 +21,20 @@ 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 Taken from Autoconf 2.50; can be removed once we assume 2.50 or later.
-define([m4_quote], [[$*]])
+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(defn([gl_HEADER_NAME]),
-                                                [-./], [___])), [
+    AC_DEFUN([gl_CHECK_HEADER_]m4_quote(translit(m4_defn([gl_HEADER_NAME]),
+                                                 [-./], [___])), [
       AC_CHECK_HEADERS(gl_HEADER_NAME)
     ])
     AC_REQUIRE([gl_CHECK_HEADER_]m4_quote(translit(gl_HEADER_NAME,
-                                                  [-./], [___])))
+                                                   [-./], [___])))
   ])
 ])
 
@@ -43,10 +43,10 @@ AC_DEFUN([AC_CHECK_HEADERS_ONCE], [
 AC_DEFUN([AC_CHECK_FUNCS_ONCE], [
   :
   AC_FOREACH([gl_FUNC_NAME], [$1], [
-    AC_DEFUN([gl_CHECK_FUNC_]defn([gl_FUNC_NAME]), [
-      AC_CHECK_FUNCS(defn([gl_FUNC_NAME]))
+    AC_DEFUN([gl_CHECK_FUNC_]m4_defn([gl_FUNC_NAME]), [
+      AC_CHECK_FUNCS(m4_defn([gl_FUNC_NAME]))
     ])
-    AC_REQUIRE([gl_CHECK_FUNC_]defn([gl_FUNC_NAME]))
+    AC_REQUIRE([gl_CHECK_FUNC_]m4_defn([gl_FUNC_NAME]))
   ])
 ])
 
@@ -55,9 +55,9 @@ AC_DEFUN([AC_CHECK_FUNCS_ONCE], [
 AC_DEFUN([AC_CHECK_DECLS_ONCE], [
   :
   AC_FOREACH([gl_DECL_NAME], [$1], [
-    AC_DEFUN([gl_CHECK_DECL_]defn([gl_DECL_NAME]), [
-      AC_CHECK_DECLS(defn([gl_DECL_NAME]))
+    AC_DEFUN([gl_CHECK_DECL_]m4_defn([gl_DECL_NAME]), [
+      AC_CHECK_DECLS(m4_defn([gl_DECL_NAME]))
     ])
-    AC_REQUIRE([gl_CHECK_DECL_]defn([gl_DECL_NAME]))
+    AC_REQUIRE([gl_CHECK_DECL_]m4_defn([gl_DECL_NAME]))
   ])
 ])