Subject: RE: bug#9141: [PATCH 1/3] extensions: Enable extensions on MacOS X 10.5 and later.

From: "Voelker, Bernhard" <[email-masked]>
Date: Mon, 25 Jul 2011 07:59:04 +0200

Paul Eggert wrote:

> diff --git a/m4/extensions.m4 b/m4/extensions.m4
> index 1330503..22156e0 100644
> --- a/m4/extensions.m4
> +++ b/m4/extensions.m4
> @@ -1,4 +1,4 @@
> -# serial 9  -*- Autoconf -*-
> +# serial 10  -*- Autoconf -*-
>  # Enable extensions on systems that normally disable them.
>  
>  # Copyright (C) 2003, 2006-2011 Free Software Foundation, Inc.
> @@ -67,6 +67,10 @@ AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
>  #ifndef _ALL_SOURCE
>  # undef _ALL_SOURCE
>  #endif
> +/* Enable general extensions on MacOS X.  */
> +#ifndef _DARWIN_C_SOURCE
> +# undef _DARWIN_C_SOURCE
> +#endif

maybe it's too early in the morning for me ... but isn't this a NOP:
"if X is not defined, then undefine it"?

Berny