[M3devel] ROOT

[Jay]

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> From: jay.krell at cornell.edu
> To: hosking at cs.purdue.edu
> CC: m3devel at elegosoft.com
> Subject: RE: [M3devel] ROOT
> Date: Thu, 2 Jul 2009 17:13:05 +0000
>
>
> Btw, I think setting an environment variable that points to the root of the source tree is a pretty small cost to pay, for almost anything.
> ROOT is a bit generic I realize.
>
>
> It is worse to be copying files around, I admit, and I'm doing that too.
> Another option is to copy /and/ commit the files, perhaps to sysutils, since we don't have to work with an old sysutils. This is the same sort of problem, you'll recall, that plagued making waitpid users not sleep() on pthreads platforms. There are still small hacks in place for that -- pretty small now, like, assuming we are on pthreads and not sleeping, to the detriment of user threads implementations.
>
>
> CM3_ROOT should work, but that might depend on your config file.
>
> I am strongly tempted to have cm3 poke around in the CVS directories and figure it out itself, as so many builds are run with .sh code that does roughly that.
>
> - Jay
>
>
>
>
>
> ----------------------------------------
>> From: jay.krell at cornell.edu
>> To: hosking at cs.purdue.edu
>> CC: m3devel at elegosoft.com
>> Subject: RE: [M3devel] ROOT
>> Date: Thu, 2 Jul 2009 16:55:16 +0000
>>
>>
>> As long as there is a need to work with older m3core, there will be hacks..
>> This stuff provides a significant value.
>> Before, the runpaths recorded would be a directory per dependent shared object -- the directory in the package store. And the runpaths were not machine portable -- if you install to a different location, which is debatable, maybe everyone should be stuck with /usr/local/cm3. OR everyone had to set LD_LIBRARY_PATH.
>>
>>
>> With the hard links, people don't have to set LD_LIBRARY_PATH and everyone can pick their own install location.
>>
>> As well the temporary staging location for a distribution is not recorded in the binaries -- e.g. it wouldn't be /usr/local/cm3, but /tmp/something.
>>
>>
>> - Jay
>>
>>
>>
>> ________________________________
>>> CC: m3devel at elegosoft.com
>>> From: hosking at cs.purdue.edu
>>> To: jay.krell at cornell.edu
>>> Subject: Re: [M3devel] ROOT
>>> Date: Thu, 2 Jul 2009 12:40:18 -0400
>>>
>>> I'm not talking about m3overrides. That is a arguably a special-purpose hack. We shouldn't layer a hack into the *normal* build process.
>>>
>>>
>>> Antony Hosking | Associate Professor | Computer Science | Purdue University
>>> 305 N. University Street | West Lafayette | IN 47907 | USA
>>> Office +1 765 494 6001 | Mobile +1 765 427 5484
>>>
>>>
>>>
>>>
>>> On 2 Jul 2009, at 12:19, Jay wrote:
>>>
>>>
>>> Seems broken to me to depend on
>>> the source directory structure
>>>
>>> Like m3overrides? But yes, I agree.
>>> m3overrides seems broken too.
>>>
>>> - Jay
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> ----------------------------------------
>>> From: hosking at cs.purdue.edu
>>> To: m3devel at elegosoft.com
>>> Date: Thu, 2 Jul 2009 11:49:34 -0400
>>> Subject: [M3devel] ROOT
>>>
>>> Where did variable ROOT come from? Do I really need to define it?
>>> Seems broken to me to depend on the source directory structure as it
>>> sets that structure in stone.
>>>
>>>
>>>