Upgrade the build commands for C++ on Mac OS X to specify C++11 & libc++.

Author: eliotmiranda

build.macos32x86/common/Makefile.rules

@@ -24,7 +24,7 @@ $(OBJDIR)/%.o: %.m deps/%.d $(MAKEFILE)
 	$(POSTCOMPILE)
 
 $(OBJDIR)/%.o: %.cpp deps/%.d $(MAKEFILE)
-	$(CC) -x c++ $(ALLFLAGS) $(INCLUDES) -c $< -o $@
+	$(CC) -x c++ -std=c++11 -stdlib=libc++ $(ALLFLAGS) $(INCLUDES) -c $< -o $@
 	$(POSTCOMPILE)
 
 deps/%.d: ;

build.macos64x64/common/Makefile.rules

@@ -24,11 +24,11 @@ $(OBJDIR)/%.o: %.m deps/%.d $(MAKEFILE)
 	$(POSTCOMPILE)
 
 $(OBJDIR)/%.o: %.cpp deps/%.d $(MAKEFILE)
-	$(CC) -x c++ $(ALLFLAGS) $(INCLUDES) -c $< -o $@
+	$(CC) -x c++ -std=c++11 -stdlib=libc++ $(ALLFLAGS) $(INCLUDES) -c $< -o $@
 	$(POSTCOMPILE)
 
 deps/%.d: ;
 
-.PRECIOUS: deps/%.d $(OBJDIR)/%.air $(OBJDIR)/%.metallib
+.PRECIOUS: deps/%.d
 
 -include $(patsubst %,deps/%.d,$(notdir $(basename $(VMSRC) $(LIBSRC))))