$NetBSD: patch-src_alloc_c,v 1.1 2011/12/31 11:40:27 dholland Exp $

- use standard headers
- add an empty asm() destroying memory that prevents gcc from
  optimizing out __malloc_hook and friends (which leads to
  SIGSEGV in temacs during build)

--- src/alloc.c.orig	2003-01-17 13:45:13.000000000 +0000
+++ src/alloc.c
@@ -57,6 +57,8 @@ Boston, MA 02111-1307, USA.  */
 extern POINTER_TYPE *sbrk ();
 #endif
 
+#include <stdlib.h>
+
 #ifdef DOUG_LEA_MALLOC
 
 #include <malloc.h>
@@ -685,6 +687,9 @@ emacs_blocked_free (ptr)
 #endif /* GC_MALLOC_CHECK */
   
   __free_hook = old_free_hook;
+#ifdef __GNUC__
+  __asm __volatile("":::"memory");
+#endif
   free (ptr);
   
   /* If we released our reserve (due to running out of memory),
@@ -728,6 +733,9 @@ emacs_blocked_malloc (size)
 
   BLOCK_INPUT;
   __malloc_hook = old_malloc_hook;
+#ifdef __GNUC__
+  __asm __volatile("":::"memory");
+#endif
 #ifdef DOUG_LEA_MALLOC
     mallopt (M_TOP_PAD, malloc_hysteresis * 4096);
 #else
@@ -776,6 +784,9 @@ emacs_blocked_realloc (ptr, size)
 
   BLOCK_INPUT;
   __realloc_hook = old_realloc_hook;
+#ifdef __GNUC__
+  __asm __volatile("":::"memory");
+#endif
 
 #ifdef GC_MALLOC_CHECK
   if (ptr)