Re: [ptxdist] Host and target triplets

Re: [ptxdist] Host and target triplets

[Michael Olbrich]

Hi,

On Wed, Jul 21, 2021 at 04:07:34PM +0200, Guillermo Rodriguez Garcia wrote:
> Are there any variables in ptxdist holding the host and target triplets,
> such as:
> 
> Host: x86_64-unknown-linux-gnu
> Target: amrv7-unknown-linux-gnueabihf

I assume, you mean variables that can be used in the package rules.
There are multiple variables available. In your example that would be:

PTXCONF_GNU_TARGET = amrv7-unknown-linux-gnueabihf
PTXCONF_COMPILER_PREFIX = amrv7-unknown-linux-gnueabihf-

GNU_HOST = x86_64-host-linux-gnu

Note that GNU_HOST has '-host-' instead of '-unknown-'. This is ab git of a
hack to support x86_64-unknown-linux-gnu for the target: If host and target
are the same then the packages won't be cross-compiled.

Regards,
Michael

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Re: [ptxdist] Host and target triplets

[Michael Olbrich]

On Thu, Jul 22, 2021 at 12:29:49PM +0200, Guillermo Rodriguez Garcia wrote:
> El mié, 21 jul 2021 a las 18:35, Guillermo Rodriguez Garcia (<
> guille.rodriguez@gmail.com>) escribió:
> > El mié, 21 jul 2021 a las 17:15, Michael Olbrich (<
> > m.olbrich@pengutronix.de>) escribió:
> >> On Wed, Jul 21, 2021 at 04:07:34PM +0200, Guillermo Rodriguez Garcia
> >> wrote:
> >> > Are there any variables in ptxdist holding the host and target triplets,
> >> > such as:
> >> >
> >> > Host: x86_64-unknown-linux-gnu
> >> > Target: amrv7-unknown-linux-gnueabihf
> >>
> >> I assume, you mean variables that can be used in the package rules.
> >> There are multiple variables available. In your example that would be:
> >>
> >> PTXCONF_GNU_TARGET = amrv7-unknown-linux-gnueabihf
> >> PTXCONF_COMPILER_PREFIX = amrv7-unknown-linux-gnueabihf-
> >>
> >
> Something does not seem to work as expected, value of PTXCONF_GNU_TARGET is
> arm-v7a-linux-gnueabihf whereas I need armv7-unknown-linux-gnueabihf. Is
> there a standard way to translate between the two?

Right, so you don't need the GNU tripple from the toolchain. So the
question is, what exactly is armv7-unknown-linux-gnueabihf? What do you
need it for?

Michael

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
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Re: [ptxdist] Host and target triplets

[Michael Olbrich]

On Thu, Jul 22, 2021 at 11:15:34PM +0200, Guillermo Rodriguez Garcia wrote:
> El jueves, 22 de julio de 2021, Michael Olbrich <m.olbrich@pengutronix.de>
> escribió:
> > On Thu, Jul 22, 2021 at 12:29:49PM +0200, Guillermo Rodriguez Garcia wrote:
> > > El mié, 21 jul 2021 a las 18:35, Guillermo Rodriguez Garcia (<
> > > guille.rodriguez@gmail.com>) escribió:
> > > > El mié, 21 jul 2021 a las 17:15, Michael Olbrich (<
> > > > m.olbrich@pengutronix.de>) escribió:
> > > >> On Wed, Jul 21, 2021 at 04:07:34PM +0200, Guillermo Rodriguez Garcia
> > > >> wrote:
> > > >> > Are there any variables in ptxdist holding the host and target
> > triplets,
> > > >> > such as:
> > > >> >
> > > >> > Host: x86_64-unknown-linux-gnu
> > > >> > Target: amrv7-unknown-linux-gnueabihf
> > > >>
> > > >> I assume, you mean variables that can be used in the package rules.
> > > >> There are multiple variables available. In your example that would be:
> > > >>
> > > >> PTXCONF_GNU_TARGET = amrv7-unknown-linux-gnueabihf
> > > >> PTXCONF_COMPILER_PREFIX = amrv7-unknown-linux-gnueabihf-
> > > >>
> > > >
> > > Something does not seem to work as expected, value of PTXCONF_GNU_TARGET
> > is
> > > arm-v7a-linux-gnueabihf whereas I need armv7-unknown-linux-gnueabihf. Is
> > > there a standard way to translate between the two?
> >
> > Right, so you don't need the GNU tripple from the toolchain. So the
> > question is, what exactly is armv7-unknown-linux-gnueabihf? What do you
> > need it for?
> 
> 
> It is a Rust target spec. I need this in order to download the right
> rust-std for the target.

Hmm, when I added rustc to OSELAS.Toolchain 2021.07.0 I had the same
problem. In the end I just hardcoded it in the config file. I had to create
a custom spec anyways. There was no exact match for some of the toolchains.

Michael

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
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