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Date: Tue, 29 Jul 2003 16:09:01 -0500
From: Dan Nelson <dnelson@allantgroup.com>
To: Ruslan Ermilov <ru@freebsd.org>
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Subject: Re: -current 'make release' status? [SOLVED]
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In the last episode (Jul 29), Ruslan Ermilov said:
> Hm, I always thought that -O2 and -Os are just useful aliases that in
> effect only turn a few dozens of -f optimization flags, and that
> switching some of them off later is allowed.  I.e., "-Os
> -fno-strict-aliasing" should work.

That does work, but there are still things you can't turn off with -f. 
They're half-aliases.  toplev.c::parse_options_and_default_flags does
set -f flags based on the optimization level, but there is still a
whole lot of gcc code that directly tests the value of optimize and
optimize_size.

-- 
	Dan Nelson
	dnelson@allantgroup.com