MAMEWorld Forums - Programming - Re: Please somone explain dependency between galaga and qwak drivers

> > > > > Once I also add the "qwak" driver it compiles fine. I think there are other
> > cases
> > > > of
> > > > > dependencies like these.
> > > > Its a dependency issue. galaga.c #includes atari_vg.h, but unless atari_vg.c is
> > > > actually compiled into mame (which it may not be due to a makefile dependency
> > > issue),
> > > > you will get an error. Compiling qwak compiles in runaway.c, which correctly
> > causes
> > > > atari_vg.c to be compiled.
> > > > >
> > > > > Can someone explain why does this happen and what would be the workaround? Is
> > > this
> > > > > expected behavior?
> > > > You should probably report it on mametesters as a galaga driver bug.
> > > >
> > > > LN
> > >
> > > Thanks LN, I added (machine)/atari_vg.o to the galaga.c line and everything
> worked
> > as
> > > expected. Not sure if this is the correct solution thou... if I find some time
> > later
> > > I will look similar cases (which I already spotted) and report to mametesters.
> >
> > I don't think this is an error. There are some sets of Dig Dug which use this same
> > atari_vg routine. There is a bit of crossover on things like that - but I would
> talk
> > it out first before reporting to MT, honestly. MAME wouldn't be dependent for
> > something if it wasn't needed.
>
> It is an error, and here's why:
> digdug (atari), in galaga.c, depends on EAROM to store highscores/etc
> the EAROM handlers are in atari_vg.o
> hence galaga.c needs to depend on atari_vg.o
>
> What probably SHOULD be done is split EAROM handling out of atari_vg.c and put it
> into /machine/earom.c or something
>
> LN

notice that galaga.c includes properly atari_vg.c and the original poster was saying that a reduced makefile (e.g. a tiny build) might miss this dependency. the problem would not be solved by splitting earom from atari_vg since one should still add the earom source in the makefile

the whole issue is not really an error (while it would have been if atari_vg was not compiled in the full makefile, but it is), just one of the main difficulties of creating tiny builds for such a large scale project like MAME/MESS.