[Libreoffice] how to 'make' a single target?

[Kevin Hunter]

At 9:29pm -0400 Sat, 29 Oct 2011, Bjoern Michaelsen wrote:
> On Sat, Oct 29, 2011 at 06:17:09PM -0400, Kevin Hunter wrote:
>> This is proving very cumbersome, however, as I'm unable to re-make
>> just the affected files. For instance

>> $ make -j1 | head; sleep; make -j1 | head
>
> The attached output indeed should never happen. What file did you
> touch to generate it?

Between those two make runs?  Nada.  (That's why I showed it working in 
one shell command line.)  If you mean before I started the compile, I'd 
touched a bunch of ScPostIt* related files in sc/inc and 
sc/source/core/data.

However, I churned through the slow build time about 20 times last night 
until I was finally able to build 'sc'.  Now the behavior seems to be 
correct, in that only the necessary files are actually built.  I.e. I 
can no longer recreate that behavior.

 From the outside, it smells to me like there is a "transactional" 
behavior defined in the make files.  That is, if all the files of a 
certain transaction don't get built properly, then the build redoes all 
of them.  Is that expected/intentional behavior?  Or did I just hit some 
corner case in my sc/ modifications?

>> Should not at least the first 3 completed executions no longer need
>> to be re-executed?
>
> Yes. Could you check the timestamps of
> (1) [...]/workdir/unxlngx6.pro/Dep/CxxObject/sc/source/filter/dif/difexp.d
> being newer than
> (2) [...]/workdir/unxlngx6.pro/CxxObject/sc/source/filter/dif/difexp.o
> and that again being newer than
> (3) [...]/sc/source/filter/dif/difexp.cxx
> , please?

Last night, (2) was newer than (1), (1) was newer than (3).  Now, after 
a couple of successful builds,  (3) is newer than (2), which is newer 
than (1).  Summary ("<=" == "younger than"):

Before success: (2) <= (1) <= (3)
After success:  (3) <= (2) <= (1)

In any event, since I can't recreate it anymore, and it seems to be 
working fine, I'm moving on ...

Thanks,

Kevin