Re: Building on MacOS X

From: Tim Orling <timothy.t.orling@linux.intel.com>
To: Roger Smith <roger@sentientblue.com>
Cc: "yocto@yoctoproject.org" <yocto@yoctoproject.org>
Subject: Re: Building on MacOS X
Date: Sat, 14 Jan 2017 11:49:55 -0800	[thread overview]
Message-ID: <6694C76C-B48D-48A1-AEFB-A3B458279EC6@linux.intel.com> (raw)
In-Reply-To: <656A5471-015B-4BE2-BEDA-7B9C98423EB8@sentientblue.com>

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> On Jan 14, 2017, at 11:45 AM, Roger Smith <roger@sentientblue.com> wrote:
> 
>> 
>> On Jan 13, 2017, at 12:50 AM, Clemens Lang <Clemens.Lang@bmw-carit.de> wrote:
>> 
>> Hi,
>> 
>> 
>>> On 12 Jan 2017, at 23:59, Mark Hatle <mark.hatle@windriver.com> wrote:
>>> 
>>> As far as I know pseudo and the security introduced in 10.11 that affect
>>> preloading is likely the biggest technical problem... everything else is just
>>> "it's not Linux”.
>> 
>> With System Integrity Protection disabled, pseudo should still work as it did before, if that’s an acceptable step for you.
>> 
>> If it isn’t, Apple’s new limitations can also be worked around in pseudo by hooking the exec(2) and posix_spawn(2) syscalls, checking if the binary to be executed is under system integrity protection, making a copy without the SIP-bit if it is and transparently running that copy instead. That code would need to be written, though (Let me know if you want to do that, I have the code for a different project.). It’s probably only a matter of time until Apple prevents that from working, too, though, e.g. by making some standard system tools signed binaries that no longer load preloaded libraries.
>> 
>> 
> 
> 
> This topic could have been clarified better, since there are multiple ways to “build” Yocto Project in  MacOS X,
> 
> Is Building Yocto project on a POSIX system, a desire for the Yocto project? It would allow support on all bsd UNIX’s including macOS
> 

Many of us use Mac laptops for development, so I think the answer is yes. As Mark mentioned, it has been an issue of time and resources. We would welcome patches :)

> 
> There are many teams inside Apple that use Linux systems for one reason or another. They would appreciate  building open source tools out the door without some other additional overhead.. 
> 
> Replacing a platforms POSIX version of tools with gnu versions  because your build environment didn’t like it, seems like a step backwards for these types of initiatives. 
> 
> Curious to know about long term support for POSIX systems. 
> 
> Apple spent alot of time and effor years ago to vertify OS X as POSIX compliant.
> 
> Roger
> 
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