osx compatibility: stepmake/stepmake/c++-rules.make

[Graham Percival]

Now that we have a DARWIN_BUILD variable defined, can the below patch 
be rewritten using
if (DARWIN_BUILD) ...
so that it could be included in the main source?

I tried doing the same "ifneq (($DARWIN_BUILD),)" that the python patch 
used, but it didn't seem to like having an if statement in the middle 
of the $(outdir) portion.


(compile patch from fink... the other fink patches aren't necessary to 
simply compile lilypond)

diff -ruN lilypond-2.7.11-orig/stepmake/stepmake/c++-rules.make 
lilypond-2.7.11/stepmake/stepmake/c+
+-rules.make
--- lilypond-2.7.11-orig/stepmake/stepmake/c++-rules.make       
2005-10-02 09:14:45.000000000 -0700
+++ lilypond-2.7.11/stepmake/stepmake/c++-rules.make    2005-10-02 
09:15:10.000000000 -0700
@@ -26,6 +26,7 @@

 $(outdir)/%.cc: %.ll
        $(FLEX) -Cfe -p -p -o$@ $<
+       perl -i.bak -pe 's/^class istream;/#include <iostream>;\nusing 
namespace std;/' $@

 $(outdir)/%-rc.o: $(outdir)/%.rc
        $(WINDRES) $(WINDRES_FLAGS) -o$@ $<