Re: Are there any cross-compiler for Embedded Linux on ARMv7?

[John McCabe <john@nospam.mccabe.org.uk>]

On Mon, 29 Mar 2021 23:40:46 +0200, Dmitry A. Kazakov wrote:

> On 2021-03-29 23:06, John McCabe wrote:
>> On Mon, 29 Mar 2021 20:26:47 +0200, Dmitry A. Kazakov wrote:
>> 
>>> On 2021-03-29 19:16, John McCabe wrote:
>>>> <..snip..>

>> Thanks for that info Dmitry. We're using Petalinux on custom hardware
>> with a Xilinx Zynq-7000 (dual-core ARM A9), so it would be nice to run
>> it on the real thing to work out how we'd deal with some of the FPGA
>> interfaces and so on, if we were to purchase.

> If you plan to run Linux there I see no reason why you could not use the
> native ARM compiler for evaluation. A cross compiler would change little
> or nothing in that case.

Well, it's not a massively powerful device, we've got 1GB RAM, and we're 
using a RAM filesystem.

> Otherwise, nothing changes. We can perfectly well compile everything
> using GNAT FSF on an ODROID-XU4. It would only take a week instead of a
> day to build...

The Zynq-7000 we're using is a dual-core ARM A9 (as I mentioned) running 
at between 866MHz. As far as I can see the ODROID XU4 has quad-A15s at 
2GHz + quad-A7s at 1.4GHz, with 2GB RAM. So, if you imagine the "week 
instead of a day" thing, then take into account the dual-core vs 8-core, 
866MHz vs 2.0GHz/1.4GHz, 1.0GB vs 2.0GB, and RAM filesystem (ok, 
admittedly we have got 4GB flash on there, but...), perhaps a native ARM 
compiler isn't going to be a very effective evaluation tool :-)