[m-rev.] for review: namespace cleanliness on aral

[Fergus Henderson]

On 08-Apr-2003, Zoltan Somogyi <zs at cs.mu.OZ.AU> wrote:
> +++ runtime/RESERVED_MACRO_NAMES	1 Apr 2003 07:42:12 -0000
> @@ -47,3 +47,11 @@
>  # Neither really pollutes the namespace.
>  __KERNEL__
>  sigcontext_struct
> +#-----------------------------------------------------------------------------#
> +# These are defined on command lines, either in the mgnuc script when calling
> +# gcc or in gcc when calling cc1. Gcc 3.2 doesn't have a means for disabling
> +# the reporting of command line options, so we have to list them here.
> +NO_SIGNALS
> +_GNU_SOURCE
> +__EXTENSIONS__
> +__OPTIMIZE__

I would split this up into two sections, one for NO_SIGNALS (which is
defined by the mgnuc script) and the other for the ones defined by gcc.
There should be an XXX for NO_SIGNALS.

So I suggest something along the lines of this:

	# This is defined by the mgnuc script in some grades.
	# It is used for configuring the Boehm collector.
	# XXX it should have a GC_ prefix.
	NO_SIGNALS

	# These are defined automatically by GCC -- gcc optionally passes
	# them on the command line when calling cc1, depending on the
	# exact options which gcc was invoked with.  These are not
	# namespace polution, since they are in the _[A-Z]* namespace
	# which is reserved for the C implementation, and they are being
	# defined by the C implementation.
	_GNU_SOURCE
	__EXTENSIONS__
	__OPTIMIZE__

Otherwise that change looks fine.

-- 
Fergus Henderson <fjh at cs.mu.oz.au>  |  "I have always known that the pursuit
The University of Melbourne         |  of excellence is a lethal habit"
WWW: <http://www.cs.mu.oz.au/~fjh>  |     -- the last words of T. S. Garp.
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