X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fcalloc.m4;h=3bab70998c1b5ef51db207ddc67837d790e84fc7;hb=82d47b6ea0888839c20d60efad01b50fc21fc27c;hp=3432493f491625532b0cbb934349305b1696dc1a;hpb=e8b82791a9b8ebb792a6a40e0b0db3c1edf71f5d;p=gnulib.git

diff --git a/m4/calloc.m4 b/m4/calloc.m4
index 3432493f4..3bab70998 100644
--- a/m4/calloc.m4
+++ b/m4/calloc.m4
@@ -1,6 +1,6 @@
-# calloc.m4 serial 7
+# calloc.m4 serial 13
 
-# Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+# Copyright (C) 2004-2011 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.
@@ -12,35 +12,46 @@
 # 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_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])])
-AS_IF([test $ac_cv_func_calloc_0_nonnull = yes], [$1], [$2])
+[
+  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],
+          [[int result = 0;
+            if (!calloc (0, 0))
+              result |= 1;
+            if (calloc ((size_t) -1 / 8 + 1, 8))
+              result |= 2;
+            return result;
+          ]])],
+       [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_GNU], [1],
+               [Define to 1 if your system has a GNU libc compatible `calloc'
+                function, and to 0 otherwise.])],
+    [AC_DEFINE([HAVE_CALLOC_GNU], [0])
+     REPLACE_CALLOC=1
+    ])
+])# gl_FUNC_CALLOC_GNU
 
 
 # gl_FUNC_CALLOC_POSIX
@@ -49,25 +60,12 @@ AC_DEFUN([AC_FUNC_CALLOC],
 # fails), and replace calloc if it is not.
 AC_DEFUN([gl_FUNC_CALLOC_POSIX],
 [
-  AC_CACHE_CHECK([whether calloc is POSIX compliant],
-    [gl_cv_func_calloc_posix],
-    [
-      dnl It is too dangerous to try to allocate a large amount of memory:
-      dnl some systems go to their knees when you do that. So assume that
-      dnl all Unix implementations of the function are POSIX compliant.
-      AC_TRY_COMPILE([],
-        [#if !((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
-         choke me
-         #endif
-        ], [gl_cv_func_calloc_posix=yes], [gl_cv_func_calloc_posix=no])
-    ])
-  if test $gl_cv_func_calloc_posix = yes; then
-    HAVE_CALLOC_POSIX=1
-    AC_DEFINE([HAVE_CALLOC_POSIX], 1,
+  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
-    AC_LIBOBJ([calloc])
-    HAVE_CALLOC_POSIX=0
+    REPLACE_CALLOC=1
   fi
-  AC_SUBST([HAVE_CALLOC_POSIX])
 ])