clang still isn't happy, or maybe it's apple make?

core/makefile

@@ -13,26 +13,34 @@ OBJS = $(addprefix $(CORE_INTDIR)/,$(SRCS:.cpp=.o))
 DEPS = $(addprefix $(CORE_INTDIR)/,$(SRCS:.cpp=.d))
 CXXFLAGS_ALL = $(CXXFLAGS) $(CXXFLAGS_EXTRA) $(INC_COMMON)
 
+# precompiled header
+
 PCH_H = core.h
 PCH_BUILD = pch.cpp
 PCH_DECOY = $(CORE_INTDIR)/$(CORE_NAME).h
 PCH = $(PCH_DECOY)$(PCH_SUFFIX)
 PCHFLAGS = $(PCH_USE) $(PCH_DECOY)$(PCH_USE_SUFFIX)
 
-$(TARGET): $(OBJS) | $(dir $(TARGET))
-	rm -f $(TARGET)
-	$(AR) rcs $(TARGET) $(OBJS)
-
 $(PCH_DECOY): | $(CORE_INTDIR)/
 	echo "#error \"Precompiled header decoy $(notdir $(PCH_DECOY)) used instead of $(notdir $(PCH))\"" > $@
 
-$(PCH): $(PCH_BUILD) $(PCH_DECOY) $(PCH_H) | $(CORE_INTDIR)/
+$(PCH).d: $(PCH_BUILD) | $(CORE_INTDIR)/
+	$(CXX) -M -MM -MF $@ -MT $(PCH) $(CXXFLAGS_ALL) -c $<
+
+$(PCH): $(PCH_BUILD) $(PCH_DECOY) $(PCH).d | $(CORE_INTDIR)/
 	$(CXX) $(PCH_COMPILE) -o $(PCH) $(CXXFLAGS_ALL) -c $(PCH_BUILD)
 
+# target build
+
+$(TARGET): $(OBJS) | $(dir $(TARGET))
+	rm -f $(TARGET)
+	$(AR) rcs $(TARGET) $(OBJS)
+
+# want $(PCHFLAGS) here but gcc does not appear to be able to use precompiled headers for -MF
 $(CORE_INTDIR)/%.d: %.cpp $(PCH) | $(CORE_INTDIR)/
 	$(CXX) -M -MM -MF $@ -MT $(CORE_INTDIR)/$(basename $<).o $(CXXFLAGS_ALL) -c $<
 
-$(CORE_INTDIR)/%.o: %.cpp $(CORE_INTDIR)/%.d | $(CORE_INTDIR)/
+$(CORE_INTDIR)/%.o: %.cpp $(CORE_INTDIR)/%.d $(PCH) | $(CORE_INTDIR)/
 	$(CXX) -o $@ $(PCHFLAGS) $(CXXFLAGS_ALL) -c $<
 
 $(CORE_INTDIR)/:
@@ -45,4 +53,4 @@ clean:
 	rm -rf $(CORE_INTDIR)
 	rm -rf $(dir $(TARGET))
 
-include $(DEPS)
+include $(PCH).d $(DEPS)