Re: [arch-general] STM32 compilation on ArchLinuxARM

[Doug Newgard]

On Wed, 28 Dec 2016 03:18:44 +
Konstantin Gribov via arch-general  wrote:

> >
> > RPi 2 B is Armv7. IIRC.
> > Idk about 3, But I think it is ArmV7  
> 
> RPi3 is armv8-a (it has Cortex-A53 cores), not armv7-a. But it's offtopic.
> 
> OP's question was about cross-compiling for Cortex-M which is for
> microcontrollers. He just wants to compile code for it on RPi as a host.
> It's not very different from compiling for Cortex-M on x86_64.

Maybe not, but this entire thread is off topic, since Arch Linux ARM is a
separate distro that's not supported here.

Re: [arch-general] STM32 compilation on ArchLinuxARM

[Konstantin Gribov via arch-general]

>
> RPi 2 B is Armv7. IIRC.
> Idk about 3, But I think it is ArmV7

RPi3 is armv8-a (it has Cortex-A53 cores), not armv7-a. But it's offtopic.

OP's question was about cross-compiling for Cortex-M which is for
microcontrollers. He just wants to compile code for it on RPi as a host.
It's not very different from compiling for Cortex-M on x86_64.
-- 

Best regards,
Konstantin Gribov

Re: [arch-general] STM32 compilation on ArchLinuxARM

[Dragon “floppy1” ryu via arch-general]

iPadから送信

2016/12/27 18:04、Konstantin Gribov via arch-general 
 のメッセージ:

> Hello.
> 
> TL;DR;
>> I need a way to install arm-none-eabi-gcc on Raspberry Pi (Arch Linux
>> ARM) using pacman or from source.
>> 
> Just use gcc package.
> 
> It has these targets:
>> valid arguments to '-march=' are: armv2 armv2a armv3 armv3m armv4 armv4t
> armv5 armv5e armv5t armv5te armv6 armv6-m armv6j armv6k armv6kz armv6s-m
> armv6t2 armv6z armv6zk armv7 armv7-a armv7-m armv7-r armv7e-m armv7ve
> armv8-a armv8-a+crc armv8.1-a armv8.1-a+crc
> iwmmxt iwmmxt2 native
> 
> Which includes armv6-m, armv6s-m, armv7-m, armv7e-m. IIRC Cortex-M3 is
> armv7-m.
> 
> Of course you have to add `-mcpu=cortex-m3`, `-mthumb`, some keys for
> freestanding environment (`-ffreestanding` and `-nostdlib`), provide your
> own linker script via `-Tyour-layout.ld`.
> 
> I've tested compilation on RPi3 with gcc, it works fine for embedded
> targets.
> 
> -- 
> 
> Best regards,
> Konstantin Gribov

RPi 2 B is Armv7. IIRC.
Idk about 3, But I think it is ArmV7

Re: [arch-general] STM32 compilation on ArchLinuxARM

[Konstantin Gribov via arch-general]

Hello.

TL;DR;
> I need a way to install arm-none-eabi-gcc on Raspberry Pi (Arch Linux
> ARM) using pacman or from source.
>
Just use gcc package.

It has these targets:
> valid arguments to '-march=' are: armv2 armv2a armv3 armv3m armv4 armv4t
armv5 armv5e armv5t armv5te armv6 armv6-m armv6j armv6k armv6kz armv6s-m
armv6t2 armv6z armv6zk armv7 armv7-a armv7-m armv7-r armv7e-m armv7ve
armv8-a armv8-a+crc armv8.1-a armv8.1-a+crc
iwmmxt iwmmxt2 native

Which includes armv6-m, armv6s-m, armv7-m, armv7e-m. IIRC Cortex-M3 is
armv7-m.

Of course you have to add `-mcpu=cortex-m3`, `-mthumb`, some keys for
freestanding environment (`-ffreestanding` and `-nostdlib`), provide your
own linker script via `-Tyour-layout.ld`.

I've tested compilation on RPi3 with gcc, it works fine for embedded
targets.

-- 

Best regards,
Konstantin Gribov

Re: [arch-general] STM32 compilation on ArchLinuxARM

[Jelle van der Waa]

On 12/27/16 at 05:40am, Foxtrot Mike via arch-general wrote:
> TL;DR;
> I need a way to install arm-none-eabi-gcc on Raspberry Pi (Arch Linux 
> ARM) using pacman or from source.

Well arm-none-eabi-gcc is a armv7 (6?) cross compiler and on your RPI
you are already running on an arm platform you probably won't need a
cross compiler. (Assuming arvm7 can compile armv6 like gcc on 64 bit can
compile 32 bit)

#archlinux-arm might also be a good place to ask questions.

> Hi guys,
> 
> First of all, I know that this mailing list entertains questions and 
> information related to Arch Linux, not Arch Linux ARM. Since I have 
> received valuable suggestions on this list before, I am going to ask  my 
> question here in the hope that someone would be able and willing to 
> help. I couldn't find the required info on the internet.
> 
> I am running Arch on my main desktop. I installed arm-none-eabi-gcc 
> package using pacman so I can compile code for my STM32F103 board.
> 
> I switched from Raspbian to ArchLinuxARM on Raspberry pi yesterday*. I 
> have found most of the my daily usage packages in ARchLinuxARM repo, but 
> can't find arm-none-eabi-gcc package. There's a post on ArchLinuxARM 
> forums [1] requesting the same info, but the post didn't get any reply.
> 
> Every google search tells ways to develop for Raspberry Pi on x86 
> computers using arm-none-eabi-gcc. I couldn't find any meaningful info 
> about developing for ARM Cortex-Mx on Raspberry pi.
> 
> Any suggestions would be apreciated.
> 
> Regards,
> Fulcrum
> 
> 
> [1] https://archlinuxarm.org/forum/viewtopic.php?f=15=10060
> 
> * Hoping to use Raspberry pi as my daily computer so I could run Windows 
> on my main desktop for gaming

-- 
Jelle van der Waa


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