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From: Doug Evans <dje@sebabeach.org>
To: cgen@sourceware.org
Subject: support for multiple rtl versions
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Date: Sun, 23 Aug 2009 16:17:00 -0000
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X-SW-Source: 2009-q3/txt/msg00072.txt.bz2

fyi,
I checked this in.

	Add define-rtl-version.
	* read.scm (-CGEN-RTL-VERSION): Renamed from -CGEN-LANG-VERSION.
	(cgen-rtl-major, cgen-rtl-minor): Similarly renamed.
	(cgen-lang-fixlevel): Delete.
	(-supported-rtl-versions): New variable.
	(-cmd-define-rtl-version): New function.
	(init-reader!): New command define-rtl-version.
	(-cgen): Add rtl version to --version output.
	* doc/rtl.texi: Document rtl version support.
	* cpu/play.cpu: Add define-rtl-version.

I have a patch that changes keyword definitions a bit to remove
some confusion, and now seemed like a good time to add the above.