Fix Windows file deletion.

Under Windows, 'del' was causing problems with the forward slashes used for directories, as these are not accepted by the shell commands, even if they are accepted as paths in general. Fix it by adding 'rm' capabilities to build-aux.py and using it in Makefile instead of the $(RM) macro.

AVsitter2/Makefile

@@ -15,9 +15,6 @@ PREPROC_KIND=mcpp
 # If the preprocessor is mcpp and it is in your path, you can leave it as is.
 PREPROC_PATH=mcpp
 
-# Command to remove files in your system. Use 'del' for Windows.
-RM=rm -f
-
 # Name of the zipped file to generate for SL
 SLZIP=AVsitter2.zip
 
@@ -67,24 +64,24 @@ OPENSIM=[AV]sitA.oss\
 all: $(SLZIP) $(OSZIP)
 
 clean:
-	$(RM) $(SLZIP) $(OSZIP) $(OPTIMIZED) $(OPENSIM)
+	$(PYTHON) build-aux.py rm $(SLZIP) $(OSZIP) $(OPTIMIZED) $(OPENSIM)
 
 optimized: $(OPTIMIZED)
 
 opensim: $(OPENSIM)
 
 $(SLZIP): $(OPTIMIZED) $(UNOPTIMIZED)
-	$(RM) $@
+	$(PYTHON) build-aux.py rm $@
 	zip $@ $(OPTIMIZED) $(UNOPTIMIZED)
 
 %.lslo: %.lsl
 	$(PYTHON) $(OPTIMIZER) -H -O addstrings,shrinknames,-extendedglobalexpr -p $(PREPROC_KIND) --precmd=$(PREPROC_PATH) $< -o $@
 
 $(OSZIP): $(OPENSIM)
-	$(RM) $@
+	$(PYTHON) build-aux.py rm $@
 	zip $@ $(OPENSIM)
 
 %.oss: %.lsl
-	$(PYTHON) prepare-for-oss.py $< > $@
+	$(PYTHON) build-aux.py oss-process $< > $@
 
 .PHONY : all clean optimized