From 4d95d23d99a35a098cdc17f91b36d41dab98a30c Mon Sep 17 00:00:00 2001
From: Yang Tse <yangsita@gmail.com>
Date: Tue, 11 Jul 2006 20:40:38 +0000
Subject: Define NEED_MALLOC_H if including <stdlib.h> is not enough for proper
 compilation and <malloc.h> must also be included.

---
 ares/acinclude.m4 | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

(limited to 'ares/acinclude.m4')

diff --git a/ares/acinclude.m4 b/ares/acinclude.m4
index 05739f114..4db7a360d 100644
--- a/ares/acinclude.m4
+++ b/ares/acinclude.m4
@@ -149,6 +149,57 @@ AC_DEFUN([CURL_CHECK_HEADER_WS2TCPIP], [
 ])
 
 
+dnl CURL_CHECK_HEADER_MALLOC
+dnl -------------------------------------------------
+dnl Check for compilable and valid malloc.h header,
+dnl and check if it is needed even with stdlib.h
+
+AC_DEFUN([CURL_CHECK_HEADER_MALLOC], [
+  AC_CACHE_CHECK([for malloc.h], [ac_cv_header_malloc_h], [
+    AC_COMPILE_IFELSE([
+      AC_LANG_PROGRAM([
+#include <malloc.h>
+      ],[
+        void *p = malloc(10);
+        void *q = calloc(10,10);
+        free(p);
+        free(q);
+      ])
+    ],[
+      ac_cv_header_malloc_h="yes"
+    ],[
+      ac_cv_header_malloc_h="no"
+    ])
+  ])
+  if test "$ac_cv_header_malloc_h" = "yes"; then
+    AC_DEFINE_UNQUOTED(HAVE_MALLOC_H, 1,
+      [Define to 1 if you have the malloc.h header file.])
+    #
+    AC_COMPILE_IFELSE([
+      AC_LANG_PROGRAM([
+#include <stdlib.h>
+      ],[
+        void *p = malloc(10);
+        void *q = calloc(10,10);
+        free(p);
+        free(q);
+      ])
+    ],[
+      curl_cv_need_header_malloc_h="no"
+    ],[
+      curl_cv_need_header_malloc_h="yes"
+    ])
+    #
+    case "$curl_cv_need_header_malloc_h" in
+      yes)
+        AC_DEFINE_UNQUOTED(NEED_MALLOC_H, 1,
+          [Define to 1 if you need the malloc.h header file.])
+        ;;
+    esac
+  fi
+])
+
+
 dnl CURL_CHECK_TYPE_SOCKLEN_T
 dnl -------------------------------------------------
 dnl Check for existing socklen_t type, and provide
-- 
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