Re: ARM ABI changes/combinations (was Re: Preparation for creating netbsd-7 branch)

[Jeff Rizzo <riz%NetBSD.org@localhost>]

(Please keep me on the cc: when replying, otherwise we get 24-hour lags 
such as this waiting for me to check list mail again)

On 7/23/14, 12:10 PM, Alan Barrett wrote:
> On Wed, 23 Jul 2014, Jeff Rizzo wrote:
> > Attached is the proposed diff to build.sh with the changes, including 
> > hpcarm -> MACHINE_ARCH=earmv4 .
>
> This patch introduces many cases in which the same 
> MACHINE/MACHINE_ARCH pair is listed under more than one ALIAS.  I 
> don't see the point of that.

To forestall complaints of the form, "the name I used to use no longer 
works, and it's not clear what new one I should use."
> Aliases are primarily useful as a shorthand for people who run 
> build.sh, and such people can be expected to adapt to changed alias 
> names or changed defaults, without needing both old and new alias 
> names to refer to identical MACHINE/MACHINE_ARCH pairs.

> OK, aliases are also usable with kver(8) from pkgsrc/devel/libkver, 
> which contains a cut and pasted copy of the part of build.sh that 
> deals with MACHINE/MACHINE_ARCH/ALIAS parsing, but kver uses are so 
> specialised that I don't think we need backward compatible aliases 
> there either.
>
> For example, in this list ...
>
> > -MACHINE=evbarm        MACHINE_ARCH=arm ALIAS=evbarm-el    DEFAULT
> > -MACHINE=evbarm        MACHINE_ARCH=armeb    ALIAS=evbarm-eb
> > +MACHINE=evbarm        MACHINE_ARCH=arm    ALIAS=evboarm-el
> > +MACHINE=evbarm        MACHINE_ARCH=armeb    ALIAS=evboarm-eb
> > +MACHINE=evbarm        MACHINE_ARCH=earm    ALIAS=evbarm-el DEFAULT
> > MACHINE=evbarm        MACHINE_ARCH=earm    ALIAS=evbearm-el
> > +MACHINE=evbarm        MACHINE_ARCH=earmeb    ALIAS=evbarm-eb
> > MACHINE=evbarm        MACHINE_ARCH=earmeb    ALIAS=evbearm-eb
> > +MACHINE=evbarm        MACHINE_ARCH=earmhf    ALIAS=evbarmhf-el
> > MACHINE=evbarm        MACHINE_ARCH=earmhf    ALIAS=evbearmhf-el
> > +MACHINE=evbarm        MACHINE_ARCH=earmhfeb ALIAS=evbarmhf-eb
> > MACHINE=evbarm        MACHINE_ARCH=earmhfeb ALIAS=evbearmhf-eb
> > +MACHINE=evbarm        MACHINE_ARCH=earmv4    ALIAS=evbarmv4-el
> > MACHINE=evbarm        MACHINE_ARCH=earmv4    ALIAS=evbearmv4-el
> > +MACHINE=evbarm        MACHINE_ARCH=earmv4eb ALIAS=evbarmv4-eb
> > MACHINE=evbarm        MACHINE_ARCH=earmv4eb ALIAS=evbearmv4-eb
> > +MACHINE=evbarm        MACHINE_ARCH=earmv5    ALIAS=evbarmv5-el
> > MACHINE=evbarm        MACHINE_ARCH=earmv5    ALIAS=evbearmv5-el
> > +MACHINE=evbarm        MACHINE_ARCH=earmv5eb ALIAS=evbarmv5-eb
> > MACHINE=evbarm        MACHINE_ARCH=earmv5eb ALIAS=evbearmv5-eb
> > +MACHINE=evbarm        MACHINE_ARCH=earmv6    ALIAS=evbarmv6-el
> > MACHINE=evbarm        MACHINE_ARCH=earmv6    ALIAS=evbearmv6-el
> > +MACHINE=evbarm        MACHINE_ARCH=earmv6hf ALIAS=evbarmv6hf-el
> > MACHINE=evbarm        MACHINE_ARCH=earmv6hf ALIAS=evbearmv6hf-el
> > +MACHINE=evbarm        MACHINE_ARCH=earmv6eb ALIAS=evbarmv6-eb
> > MACHINE=evbarm        MACHINE_ARCH=earmv6eb ALIAS=evbearmv6-eb
> > +MACHINE=evbarm        MACHINE_ARCH=earmv6hfeb ALIAS=evbarmv6hf-eb
> > MACHINE=evbarm        MACHINE_ARCH=earmv6hfeb ALIAS=evbearmv6hf-eb
> > +MACHINE=evbarm        MACHINE_ARCH=earmv7    ALIAS=evbarmv7-el
> > MACHINE=evbarm        MACHINE_ARCH=earmv7    ALIAS=evbearmv7-el
> > +MACHINE=evbarm        MACHINE_ARCH=earmv7eb ALIAS=evbarmv7-eb
> > MACHINE=evbarm        MACHINE_ARCH=earmv7eb ALIAS=evbearmv7-eb
> > +MACHINE=evbarm        MACHINE_ARCH=earmv7hf ALIAS=evbarmv7hf-el
> > MACHINE=evbarm        MACHINE_ARCH=earmv7hf ALIAS=evbearmv7hf-el
> > +MACHINE=evbarm        MACHINE_ARCH=earmv7hfeb ALIAS=evbarmv7hf-eb
> > MACHINE=evbarm        MACHINE_ARCH=earmv7hfeb ALIAS=evbearmv7hf-eb
>
> ... I'd keep the new ALIAS=evbearm* and remove the old ALIAS=evbarm*
> lines, not provide both.

This ^^^  is actually why I have two aliase, because I personally would 
keep the evbarm* style ones (since that's the port name) while removing 
the evbearm* style ones, now that earm is the default.


That said, if people don't care about aliases, I can remove them.

> --apb (Alan Barrett)

+j