svn commit: r317632 - head/sys

[Ngie Cooper (yaneurabeya)]

> On May 1, 2017, at 09:34, Warner Losh <imp at bsdimp.com> wrote:
> 
> On Mon, May 1, 2017 at 10:30 AM, Rodney W. Grimes
> <freebsd at pdx.rh.cn85.dnsmgr.net> wrote:
>>> Author: ngie
>>> Date: Mon May  1 05:59:52 2017
>>> New Revision: 317632
>>> URL: https://svnweb.freebsd.org/changeset/base/317632
>>> 
>>> Log:
>>>  Fix "make cscope-clean" when .OBJDIR already exists
>>> 
>>>  The cscope generated files are always put in .CURDIR .
>> 
>> If this is writing to src dir then it should be fixed,
>> or have we abandoned all hope of readonly src tree?
> 
> This is only for the cscope target, which isn't part of the normal build.
> 
> readonly src tree works great still….

Hi Rod,
	I can’t personally vouch for readonly src trees working in all cases, but readonly src trees work well for installation purposes (I use readonly obj and src trees at work when installing over NFS).
	As Warner noted, “make cscope” is a developer target that aids with building the cscope database in a consistent manner. It doesn’t conform to the existing “norms” of build targets in the tree; changing the behavior doesn’t seem prudent at this point in time because it would violate POLA.
Thanks!
-Ngie
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