avoid some overlong lines from posix urls, etc.

[gnulib.git] / m4 / calloc.m4

diff --git a/m4/calloc.m4 b/m4/calloc.m4
index f244df7..e62da1e 100644 (file)
--- a/m4/calloc.m4
+++ b/m4/calloc.m4
@@ -1,20 +1,9 @@
-# calloc.m4 serial 3
+# calloc.m4 serial 10
 
-# Copyright (C) 2004 Free Software Foundation, Inc.
-
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software Foundation,
-# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+# Copyright (C) 2004-2010 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
 
 # Written by Jim Meyering.
 
@@ -23,34 +12,56 @@
 # If so, define HAVE_CALLOC.  Otherwise, define calloc to rpl_calloc
 # and arrange to use a calloc wrapper function that does work in that case.
 
-# _AC_FUNC_CALLOC_IF(IF-WORKS, IF-NOT)
+# _AC_FUNC_CALLOC_IF([IF-WORKS], [IF-NOT])
 # -------------------------------------
 # If `calloc (0, 0)' is properly handled, run IF-WORKS, otherwise, IF-NOT.
 AC_DEFUN([_AC_FUNC_CALLOC_IF],
-[AC_REQUIRE([AC_HEADER_STDC])dnl
-AC_REQUIRE([AC_TYPE_SIZE_T])dnl
-AC_CHECK_HEADERS(stdlib.h)
-AC_CACHE_CHECK([for GNU libc compatible calloc], ac_cv_func_calloc_0_nonnull,
+[AC_REQUIRE([AC_TYPE_SIZE_T])dnl
+AC_CACHE_CHECK([for GNU libc compatible calloc], [ac_cv_func_calloc_0_nonnull],
 [AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
-                 [exit (!calloc (0, 0) || calloc ((size_t) -1 / 8 + 1, 8));])],
-              [ac_cv_func_calloc_0_nonnull=yes],
-              [ac_cv_func_calloc_0_nonnull=no],
-              [ac_cv_func_calloc_0_nonnull=no])])
+                  [[exit (!calloc (0, 0) || calloc ((size_t) -1 / 8 + 1, 8));]])],
+               [ac_cv_func_calloc_0_nonnull=yes],
+               [ac_cv_func_calloc_0_nonnull=no],
+               [ac_cv_func_calloc_0_nonnull=no])])
 AS_IF([test $ac_cv_func_calloc_0_nonnull = yes], [$1], [$2])
 ])# AC_FUNC_CALLOC
 
 
-# AC_FUNC_CALLOC
-# ---------------
+# gl_FUNC_CALLOC_GNU
+# ------------------
 # Report whether `calloc (0, 0)' is properly handled, and replace calloc if
 # needed.
-AC_DEFUN([AC_FUNC_CALLOC],
-[_AC_FUNC_CALLOC_IF(
-  [AC_DEFINE([HAVE_CALLOC], 1,
-            [Define to 1 if your system has a GNU libc compatible `calloc'
-             function, and to 0 otherwise.])],
-  [AC_DEFINE([HAVE_CALLOC], 0)
-   AC_LIBOBJ([calloc])
-   AC_DEFINE([calloc], [rpl_calloc],
-      [Define to rpl_calloc if the replacement function should be used.])])
-])# AC_FUNC_CALLOC
+AC_DEFUN([gl_FUNC_CALLOC_GNU],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  _AC_FUNC_CALLOC_IF(
+    [AC_DEFINE([HAVE_CALLOC], [1],
+               [Define to 1 if your system has a GNU libc compatible `calloc'
+                function, and to 0 otherwise.])],
+    [AC_DEFINE([HAVE_CALLOC], [0])
+     gl_REPLACE_CALLOC
+    ])
+])# gl_FUNC_CALLOC_GNU
+
+
+# gl_FUNC_CALLOC_POSIX
+# --------------------
+# Test whether 'calloc' is POSIX compliant (sets errno to ENOMEM when it
+# fails), and replace calloc if it is not.
+AC_DEFUN([gl_FUNC_CALLOC_POSIX],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([gl_CHECK_MALLOC_POSIX])
+  if test $gl_cv_func_malloc_posix = yes; then
+    AC_DEFINE([HAVE_CALLOC_POSIX], [1],
+      [Define if the 'calloc' function is POSIX compliant.])
+  else
+    gl_REPLACE_CALLOC
+  fi
+])
+
+AC_DEFUN([gl_REPLACE_CALLOC],
+[
+  AC_LIBOBJ([calloc])
+  REPLACE_CALLOC=1
+])