clang has different PCH invocation

suppress include dependency files error for clean build

cmd/makefile

@@ -46,4 +46,4 @@ clean:
 	rm -rf $(CMD_INTDIR)
 	rm -rf $(dir $(TARGET))
 
-include $(DEPS)
+-include $(DEPS)

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).gch
-PCHFLAGS = -Winvalid-pch -include $(PCH_DECOY)
-
-$(TARGET): $(OBJS) | $(dir $(TARGET))
-	rm -f $(TARGET)
-	$(AR) rcs $(TARGET) $(OBJS)
+PCH = $(PCH_DECOY)$(PCH_SUFFIX)
+PCHFLAGS = $(PCH_USE) $(PCH_DECOY)$(PCH_USE_SUFFIX)
 
 $(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)/
-	$(CXX) -x c++-header -o $(PCH) $(CXXFLAGS_ALL) -c $(PCH_BUILD)
+$(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)

gui/makefile

@@ -33,4 +33,4 @@ clean:
 	rm -rf $(GUI_INTDIR)
 	rm -rf $(dir $(TARGET))
 
-include $(DEPS)
+-include $(DEPS)

makefile.common

@@ -45,6 +45,10 @@ ifeq ($(OS),Windows_NT)
 	LDFLAGS_GUI ?=
 	LDFLAGS_NSFPLAY ?= -mwindows
 	LDFLAGS_DLL ?= -mdll
+	PCH_COMPILE ?= -x c++-header
+	PCH_USE ?= -Winvalid-pch --include
+	PCH_USE_SUFFIX ?=
+	PCH_SUFFIX ?= .gch
 	LIB_SUFFIX ?= .a
 	EXE_SUFFIX ?= .exe
 	DLL_SUFFIX ?= .dll
@@ -67,7 +71,7 @@ ifeq ($(OS),Windows_NT)
 			-luuid -lole32 -loleacc -loleaut32 \
 			-lversion -lshlwapi -luxtheme -lwinspool
 	endif
-	# wxWidgets props files include:
+	# wxWidgets props files included:
 	#   kernel32.lib, user32.lib, gdi32.lib, comdlg32.lib, winspool.lib, shell32.lib
 	#   shlwapi.lib, ole32.lib, oleaut32.lib, uuid.lib, advapi32.lib, version.lib
 	#   comctl32.lib, rpcrt4.lib, ws2_32.lib, wininet.lib, winmm.lib
@@ -79,6 +83,10 @@ else ifeq ($(shell uname),Darwin)
 	LDFLAGS_GUI ?=
 	LDFLAGS_NSFPLAY ?=
 	LDFLAGS_DLL ?= -shared
+	PCH_COMPILE ?= -x c++-header
+	PCH_USE ?= -include-pch
+	PCH_USE_SUFFIX ?= .pch
+	PCH_SUFFIX ?= .pch
 	LIB_SUFFIX ?= .a
 	EXE_SUFFIC ?=
 	DLL_SUFFIX ?= .so
@@ -92,6 +100,10 @@ else
 	LDFLAGS_GUI ?=
 	LDFLAGS_NSFPLAY ?=
 	LDFLAGS_DLL ?= -shared
+	PCH_COMPILE ?= -x c++-header
+	PCH_USE ?= -Winvalid-pch --include
+	PCH_USE_SUFFIX ?=
+	PCH_SUFFIX ?= .gch
 	LIB_SUFFIX ?= .a
 	EXE_SUFFIX ?=
 	DLL_SUFFIX ?= .so

nsfplay/makefile

@@ -76,5 +76,4 @@ mac: $(ICON_INTDIR)/nsfplay.icns Info.plist ../version.txt
 $(ICON_INTDIR)/nsfplay.icns:
 	make -C ../icons mac
 
-
-include $(DEPS)
+-include $(DEPS)

winamp/makefile

@@ -43,4 +43,4 @@ clean:
 	rm -rf $(WINAMP_INTDIR)
 	rm -rf $(dir $(TARGET))
 
-include $(DEPS)
+-include $(DEPS)