From owner-freebsd-current  Thu Jun 13 17:51:17 2002
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Date: Thu, 13 Jun 2002 17:45:43 -0700
From: Terry Lambert <tlambert2@mindspring.com>
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To: Juli Mallett <jmallett@FreeBSD.org>
Cc: Alex Zepeda <zipzippy@sonic.net>, Bruce Evans <bde@zeta.org.au>,
	current@freebsd.org
Subject: Re: Broken world in rtld-elf...
References: <20020612231541.GA1543@blarf.homeip.net> <20020613121920.T1422-100000@gamplex.bde.org> <20020613191637.GA57841@blarf.homeip.net> <3D093302.42B0E0F6@mindspring.com> <20020613172608.C62694@FreeBSD.ORG>
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Juli Mallett wrote:
> Errr, it was with 0 level optimisation that is the problem, not a real
> level.  Read carefully what bde said, and look at hte warnings and how
> GCC deals with the code in question.
> 
> Also, your example is very wrong, read make(1)'s section on dealing with
> variables.


I know my example is very wrong; though it could be used to grep
for optimizer flags, where it could not be used for what I jokingly
said it could be used for... I guess it was too subtle.

Question:

	-O0 fails to produce good code; how do I check and warn if
	-O0 is being used?

Answer:

	Fix -O0, or grep its use and complain about it

Answer 2:

	Make its use an argument error to the compiler, until it is
	fixed

Answer 3:

	Quit munging the Makefiles, when they will just need to be
	unmunged later, and the problem goes away if you change
	the compiler

-- Terry

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