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Re: alloca_.h suggested change
From: |
Paul Eggert |
Subject: |
Re: alloca_.h suggested change |
Date: |
Mon, 19 Jun 2006 02:41:33 -0700 |
User-agent: |
Gnus/5.1008 (Gnus v5.10.8) Emacs/21.4 (gnu/linux) |
Thanks for reporting that. Wouldn't it be safer to skip all forms
of defining alloca, if it's already defined? I installed this,
which puts an "#ifndef alloca" around everything.
2006-06-19 Paul Eggert <address@hidden>
* alloca_.h (alloca) [defined alloca]: Don't define or declare.
--- alloca_.h 14 May 2005 06:03:57 -0000 1.8
+++ alloca_.h 19 Jun 2006 09:39:50 -0000 1.9
@@ -1,6 +1,6 @@
/* Memory allocation on the stack.
- Copyright (C) 1995, 1999, 2001, 2002, 2003, 2004 Free Software
+ Copyright (C) 1995, 1999, 2001, 2002, 2003, 2004, 2006 Free Software
Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
@@ -34,19 +34,21 @@
request, the program just crashes.
*/
-#ifdef __GNUC__
-# define alloca __builtin_alloca
-#elif defined _AIX
-# define alloca __alloca
-#elif defined _MSC_VER
-# include <malloc.h>
-# define alloca _alloca
-#else
-# include <stddef.h>
-# ifdef __cplusplus
+#ifndef alloca
+# ifdef __GNUC__
+# define alloca __builtin_alloca
+# elif defined _AIX
+# define alloca __alloca
+# elif defined _MSC_VER
+# include <malloc.h>
+# define alloca _alloca
+# else
+# include <stddef.h>
+# ifdef __cplusplus
extern "C"
-# endif
+# endif
void *alloca (size_t);
+# endif
#endif
#endif /* _GNULIB_ALLOCA_H */