Re: Conditionally falling back to the .c code or a different .S

[Roland McGrath <roland at redhat dot com>]

> So for the 'Implies' case you mean that vN+1 would have an imply that
> pulled in vN and that
> would have an Implies that pulled in vN-1 ?

Right.

> What do you mean by the 'set of more-specific subdirectories'?

If you create sysdeps/arm/armv6/armv7/armv8 then when submachine
is set to armv6/armv7/armv8 that will automatically imply
arm/armv6/armv7 and arm/armv6, when submachine is set to
armv6/armv7 that will automatically imply arm/armv6, etc.

The Implies file approach is what seems to be used the most already.  
That approach lets --with-cpu=foobar automatically compile with
-mcpu=foobar as well as selecting the sysdeps/cpu/foobar directory.

But it's really up to your CPU's main maintainer to decide how this should
be done for that CPU.  For arm, that's Joseph Myers <joseph@codesourcery.com>.


Thanks,
Roland