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

From: Geert Bosch
Subject: Re: changing "configure" to default to "gcc -g -O2 -fwrapv ..."
Date: Mon, 1 Jan 2007 12:23:34 -0500

On Jan 1, 2007, at 12:16, Joseph S. Myers wrote:
For a program to be secure in the face of overflow, it will generally need explicit checks for overflow, and so -fwrapv will only help if such checks
have been written under the presumption of -fwrapv semantics.

Yes, but often people do write such defensive code,
and many such checks now get removed by gcc.

If I compute some value, I may check the result
before accessing an array or similar. Such local
defenses are of no use with current gcc without


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