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# common.mk - common make rules to build Prex
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#
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# This file includes the common rules to make Prex source tree.
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# The files are installed in /mk, and are, by convention,
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# named with the suffix ".mk".
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#
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# Supported environment variables:
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#
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#  SRCDIR          ... Root directory of source tree
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#  NDEBUG          ... Force disable debug switch (default: 0)
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#  LIBGCC_PATH     ... Path for libgcc.a (optional)
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#
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# Variables in local Makefile:
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#
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#  TARGET          ... Target file name
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#  SUBDIR,SUBDIR-y ... List of subdirectories
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#  SRCS,SRCS-y     ... Source files
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#  OBJS,OBJS-y     ... Object files
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#  LIBS            ... Libraries
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#  INCSDIR         ... Include path
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#  LIBSDIR         ... Library path
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#  DEFS            ... Definition to pass to the compiler
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#  MAP             ... Name of map file
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#  DISASM          ... Name of disassemble file
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#  SYMBOL          ... Name of symbol file
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#
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ifndef _COMMON_MK_
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_COMMON_MK_:=	1
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ifdef _GNUC_
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include $(SRCDIR)/mk/gcc.mk
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endif
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ifdef _PCC_
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include $(SRCDIR)/mk/pcc.mk
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endif
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ifdef _SUNPRO_C_
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include $(SRCDIR)/mk/suncc.mk
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endif
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ifdef DISASM
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ASMGEN=		$(OBJDUMP) $@ --disassemble-all > $(DISASM)
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endif
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ifdef SYMBOL
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SYMGEN=		cp $@ $(SYMBOL)
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endif
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SUBDIR+=	$(SUBDIR-y)
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OBJS+=		$(OBJS-y)
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SRCS+=		$(SRCS-y)
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ifeq ($(OBJS),)
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OBJS+=		$(addsuffix .o,$(basename $(SRCS)))
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endif
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.SUFFIXES:
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.SUFFIXES: .bin .a .o .S .c .cc .cpp .cxx .h
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ifeq ($(_SILENT_),1)
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echo-file=	@echo '  $(1) $(subst $(SRCDIR)/,,$(abspath $(2)))'
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echo-files=	@(for d in $(2) _ ; do \
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		  if [ "$$d" != "_" ]; then \
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		    echo "  $(1) $(subst $(SRCDIR)/,,$(abspath $$d))" ; fi; \
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		  done);
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endif
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#
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# Inference rules
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#
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%.o: %.c
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	$(call echo-file,CC     ,$<)
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	$(CC) $(CFLAGS) $(CPPFLAGS) $(OUTPUT_OPTION) $<
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%.o: %.S
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	$(call echo-file,AS     ,$<)
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	$(CPP) $(ACPPFLAGS) $(CPPFLAGS) $< $*.tmp
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	$(AS) $(ASFLAGS) $(OUTPUT_OPTION) $*.tmp
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	$(RM) $*.tmp
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#
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# Target
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#
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all: config $(SUBDIR) $(TARGET)
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#
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# Check configuration file
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#
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.PHONY: config
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config:
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ifndef ARCH
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	@echo 'Error: You must run `configure` before make.'
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	exit 1
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endif
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#
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# Rules to process sub-directory
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#
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ifdef SUBDIR
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.PHONY: $(SUBDIR)
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$(SUBDIR): dummy
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	@$(MAKE) -C $@
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endif
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-include Makefile.dep
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#
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# Depend
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#
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.PHONY: depend dep
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depend dep:
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ifdef SUBDIR
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	@(for d in $(SUBDIR) _ ; do \
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	  if [ "$$d" != "_" ]; then $(MAKE) -C $$d depend; fi; \
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	done);
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endif
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	$(RM) Makefile.dep
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	@(for d in $(SRCS) _ ; do \
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	  if [ "$$d" != "_" ]; then \
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	  $(CPP) -M $(CPPFLAGS) $$d >> Makefile.dep; fi; \
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	done);
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#
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# Lint
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#
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.PHONY: lint
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lint:
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ifdef SUBDIR
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	@(for d in $(SUBDIR) _ ; do \
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	  if [ "$$d" != "_" ]; then $(MAKE) -C $$d lint; fi; \
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	done);
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endif
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	@(for d in $(filter %.c, $(SRCS)) _ ; do \
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	  if [ "$$d" != "_" ]; then \
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	  echo ; \
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	  echo "Checking $$d" ; \
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	  $(LINT) $(CPPFLAGS) $(LINTFLAGS) $$d; fi; \
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	done);
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#
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# Clean up
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#
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CLEANS= Makefile.dep $(TARGET) $(OBJS) $(DISASM) $(MAP) $(SYMBOL) $(CLEANFILES)
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.PHONY: clean
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clean:
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ifdef SUBDIR
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	@(for d in $(SUBDIR) _ ; do \
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	  if [ "$$d" != "_" ]; then $(MAKE) -C $$d clean; fi; \
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	done);
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endif
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	$(call echo-files,CLEAN  ,$(CLEANS))
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	$(RM) $(CLEANS)
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.PHONY: dummy
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#
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# Build OS image
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#
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.PHINY: image
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image: config $(TARGET)
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endif # !_COMMON_MK_