On Sat, Mar 4, 2017 at 1:25 PM, Bryan Drewery <bdrew...@freebsd.org> wrote:
> On 3/4/2017 12:20 PM, Rodney W. Grimes wrote:
>> -- Start of PGP signed section.
>> [ Charset windows-1252 unsupported, converting... ]
>>> On 3/4/2017 7:34 AM, Rodney W. Grimes wrote:
>>>> What is ${.CURDIR:H:H} ????? Yes that seems to work but now we are
>>>> obscuring
>>>> ../.. into makefile syntax magic, probably not a grand idea.
>>> It just trims off the last directory component. This both reduces
>>> namecache lookups, lessens the amount of data in a log, and makes
>>> debugging a log simpler by not having a crazy path like:
>>> /home/bdrewery/big/git/buildserver/sys/modules/usb/template/../../../dev/usb/template/usb_template.c
>>>
>>> It's far simpler to understand and work with:
>>> /home/bdrewery/big/git/buildserver/sys/dev/usb/template/usb_template.c
>>>
>>> The only downside is it is slightly more obscure in a Makefile, but once
>>> you know what :H is then it's not a problem. This is why SRCTOP is even
>>> better than this as it is far more clear than even :H and avoids the
>>> ../../ problems.
>> Lets do one or the other, but not both ${SRCTOP} and :H:H:H. It appears
>> that we now have a mix and mashed up some one way others the other.
>
> That I can agree with. I would prefer to standardize on SRCTOP as :H is
> too obscure without learning about make details.
:H is insane in 90% of the cases I've seen it used. Let's roll with
SRCTOP everywhere we can. That's safer from directory motion anyway...
Warner
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