[Psi-Devel] make -j

[Justin Karneges]

On Wednesday 15 July 2009 03:32:47 Davide Pesavento wrote:
> On Wed, Jul 15, 2009 at 09:27, Justin Karneges<justin-psi2 at affinix.com> 
wrote:
> > On Tuesday 14 July 2009 23:53:40 Aleksey "AlekSi" Palazhchenko wrote:
> >> aleksi at tower:~/Code/psi$ make -j3
> >> cd third-party/qca/ && /usr/bin/qmake-qt4 qca.pro -unix -o Makefile
> >> cd iris/ && /usr/bin/qmake-qt4 iris.pro -unix -o Makefile
> >> cd src/ && /usr/bin/qmake-qt4 src.pro -unix -o Makefile
> >
> > Ah, it looks like the makefiles for subdirs all get made at the same
> > time.  We need to fix this so src.pro doesn't get processed until later
> > on (specifically, until some other iris .pro files are processed, but
> > waiting until the iris dir is entirely built would work well enough too).
>
> Could you explain why you need these dependencies please?

If you're asking, "why does src depend on iris at all?", that should be 
obvious.  If src finishes before iris, then you'll get a linking error 
because iris wouldn't exist yet to link against.

If you're asking why the above .pro processing order is a problem, it's 
because we use qmake's prl feature for handling dependencies of static 
libraries.  qmake resolves dependencies by inspecting .prl files.  However, 
libiris.prl does not exist until iris/src/xmpp/xmpp.pro is processed.  This 
is a problem when qmake is processing src.pro too early, because the .prl 
files don't exist yet and won't be found.

-Justin