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Re: changing "configure" to default to "gcc -g -O2 -fwrapv ..."

From: Robert Dewar
Subject: Re: changing "configure" to default to "gcc -g -O2 -fwrapv ..."
Date: Tue, 02 Jan 2007 09:06:09 -0500
User-agent: Thunderbird (Windows/20061207)

Richard Kenner wrote:
Then we have two switches:


which allows all optimizations (name can be changed, I
don't care about the name)


which changes the semantics to require wrapping in
all cases (including loops)

What about -fno-wrapv for the first?

Possible .. my view was that it is probably not necessary
to distinguish the various subcases which arise now or in
the future of aggressive optimization opportunities based
on assumption of strict standard semantics.

For example, for me in -fstandard, I would tolerate the
"dewar password check example" being optimized to remove
the password check.

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