Code review comment for lp:~wence/fluidity/make-fixes

I'm not quite happy with this entire series as is. Specifically, it breaks the sequence:

make
make clean-light
make

Since libwm is not cleaned by clean-light, the object files are left lying around. The default rule in libwm/Makefile with this patch series is:

default: $(LIB)

$(LIB): $(OBJS)
     $(AR) $(ARFLAGS) $(LIB) $(OBJS)
 cp *.h ../include/

But the make sequence is:

make debug
make libwm

debug touches $(LIB) and so the modtime for $(LIB) is newer than $(OBJS), so they're not linked in to the library. This causes an undefined symbol link error when we try to build bin/fluidity.

I see two ways of fixing this:

revert to the previous (.PHONY) rule:

default: $(OBJS)
        ...

So that the object files are always stuffed in $(LIB)

Or add libwm to the list of clean-light targets.

I prefer the latter, thoughts?