basic asm and memory clobbers - Proposed solution

[Joseph Myers]

On Tue, 1 Dec 2015, David Wohlferd wrote:

> Saying it's dead in the docs is the first step to making it dead in the code.
> This patch just implements an optional warning (unless #3,4 crank it up to a
> default warning), but the intent is that eventually (v7? v8?) this turns into
> a fatal error.

I am strongly skeptical of this whole direction.  As I noted, the basic 
asm syntax is part of the standard C++ syntax.  We should define it to do 
something sensible consistent with existing practice.  (That does not 
exclude a non-default warning, not part of -Wall or -Wextra, for people 
who wish to avoid basic asm in functions.)

-- 
Joseph S. Myers
joseph@codesourcery.com