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From: Kyle Evans <kevans@freebsd.org>
Date: Thu, 3 May 2018 16:57:25 -0500
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Subject: Re: svn commit: r468990 - in head/devel: . xtensa-esp32-elf
To: Craig Leres <leres@freebsd.org>
Cc: ports-committers@freebsd.org, svn-ports-all@freebsd.org, 
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On Thu, May 3, 2018 at 4:50 PM, Craig Leres <leres@freebsd.org> wrote:
> Author: leres
> Date: Thu May  3 21:50:21 2018
> New Revision: 468990
> URL: https://svnweb.freebsd.org/changeset/ports/468990
>
> Log:
>   This adds devel/xtensa-esp32-elf which builds the Espressif
>   ESP32 toolchain for use with Arduino and FreeRTOS projects.
>
>   Reviewed by:  matthew (mentor)
>   Approved by:  matthew (mentor)
>   Differential Revision:        https://reviews.freebsd.org/D15271
>

!

Have you looked at ESP8266, by chance? (xtensa-lx106, I think)

I received an ESP8266 from wblock@ to look at porting it a while back
(toolchain + arduino core), but I ran into some binutils issues and
had roadblock'd there.

Thanks,

Kyle Evans