Re: relative objtree change broke tar builds?

[Michal Marek <mmarek@suse.cz>]

Dne 18.6.2014 17:58, Randy Dunlap napsal(a):
> On 06/18/14 06:14, J. Bruce Fields wrote:
>> On Wed, Jun 18, 2014 at 02:33:22PM +0200, Michal Marek wrote:
>>> Dne 18.6.2014 14:20, J. Bruce Fields napsal(a):
>>>> On Wed, Jun 18, 2014 at 11:06:12AM +0200, Michal Marek wrote:
>>>>> Dne 18.6.2014 00:38, J. Bruce Fields napsal(a):
>>>>>> The changelog there says
>>>>>>
>>>>>> 	The main Makefile sets its working directory to the object tree
>>>>>> 	and never changes it again. Therefore, we can use '.' instead of
>>>>>> 	the absolute path.
>>>>>>
>>>>>> But the main Makefile also exports objtree, and a quick grep suggests
>>>>>> lots of other uses outside the main Makefile.
>>>>>
>>>>> Do you have examples? Besides your report, I'm only aware of make
>>>>> deb-pkg and make *docs. What else?
>>>>
>>>> I haven't looked.
>>>>
>>>> I only note that grep finds 47 files referencing that variable, and
>>>> absent some argument that the remaining ones are correct, I'd be
>>>> inclined to revert.
>>>
>>> Do these 47 files change the working directory before referencing the
>>> variable?
>>
>> Sorry, I'm not volunteering to check.
>>
>> Note also that other variables are defined in terms of objtree, and they
>> may be exported or passed to other scripts.
> 
> 
> I'll note one side effect that I really dislike:
> If not in silent mode, scripts/mkmakefile tells me that the it is
> generating ./Makefile.  I want to see the real path there instead of '.'.

The idea is that one should be able to compare as much as possible
between the build of /usr/src/linux-<version_a> built in
/usr/src/linux-<version_a>/build and /usr/src/linux-<version_b> built in
/usr/src/linux-<version_b>/build. One can now even compare the build log
with -j1, although that was not the primary goal. So if the changed
message is considered problematic, I can change it to show the full path
again, like

diff --git a/scripts/mkmakefile b/scripts/mkmakefile
index 84af27b..9d291f5 100644
--- a/scripts/mkmakefile
+++ b/scripts/mkmakefile
@@ -18,7 +18,7 @@ then
        exit 0
 fi
 if [ "${quiet}" != "silent_" ]; then
-       echo "  GEN     $2/Makefile"
+       echo "  GEN     $(cd $2 && /bin/pwd)/Makefile"
 fi

 cat << EOF > $2/Makefile

Opinions?

Thanks,
Michal