Re: Issue 2177 in lilypond: Patch: Reverts public interface for simple spacer.

[lilypond]

Comment #5 on issue 2177 by address@hidden: Patch: Reverts public interface  
for simple spacer.
http://code.google.com/p/lilypond/issues/detail?id=2177

The .dep files are created _along_ with the .o files.  As a result, they  
don't track changes in dependencies until the file has been recompiled.

The Makefile has to make "reasonable assumptions" about the dependencies  
before the first full compilation, mostly that x.o depends on x.c and  
nothing else.  Where this is not enough, explicit rules need to be added.   
The whole concept is pretty fragile and does not follow changing  
dependencies.

I don't see that Patchy can easily get around the equivalent of "make  
clean".  Both faster and more reliable would be "git clean": this deletes  
_any_ file that is not known to git.  But didn't you run the testing in a  
freshly created checkout directory anyway?