build order (random) problem with QtGenerated* files

[Janek Kozicki]

Make a fresh checkout, then built with lots of jobs (for example jobs=8).
And there's a 50% chance that you will get this build error:

  yade/gui-qt3/SimulationController.hpp:22 error:QtGeneratedSimulationController.h: No such file or directory

When you invoke scons second time - it will just work.

This problem occurs because sometimes SimulationController.hpp is
included & compiled *before* the file QtGeneratedSimulationController.h
had a chance to be generated. Of course on second build it is already
generated, so the second time it works.

[Janek Kozicki (cosurgi)]

maybe the simplest approach would be to compile in two-passes. First (only if QT is enabled) generate all QtGenerated* files - this will be really fast, then do the usual compilation.

[Václav Šmilauer (eudoxos)]

#1 wouldn't work since scons handles the generation of files by itself.

I tried to add explicit dependency, the problem comes from GLViewer.cpp. Probably an issue of moc generating header files elsewhere than in the same directory and such. I was now able to reproduce the bug in all cases, even with 1 job, just by running scons after "scons clean".

Try r1904 and mark the bug as Fix Released if it is OK for you. For me it is OK now.

[Janek Kozicki (cosurgi)]

For me this bug occurred randomly since long time ago (like 6 months). Let's wait few weeks to see if it really does not occur again.

[Václav Šmilauer (eudoxos)]

Reopen if you encounter it. For me it has not happened since.