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# common.mk - common make rules to build Prex

#
# This file includes the common rules to make Prex source tree.
# The files are installed in /mk, and are, by convention,
# named with the suffix ".mk".
#
# Supported environment variables:
#
#  SRCDIR          ... Root directory of source tree
#  NDEBUG          ... Force disable debug switch (default: 0)
#  LIBGCC_PATH     ... Path for libgcc.a (optional)
#
# Variables in local Makefile:
#
#  TARGET          ... Target file name
#  SUBDIR,SUBDIR-y ... List of subdirectories
#  SRCS,SRCS-y     ... Source files
#  OBJS,OBJS-y     ... Object files
#  LIBS            ... Libraries
#  INCSDIR         ... Include path
#  LIBSDIR         ... Library path
#  DEFS            ... Definition to pass to the compiler
#  MAP             ... Name of map file
#  DISASM          ... Name of disassemble file
#  SYMBOL          ... Name of symbol file
#

ifndef _COMMON_MK_
_COMMON_MK_:=   1

ifdef _GNUC_
include $(SRCDIR)/mk/gcc.mk
endif

ifdef _PCC_
include $(SRCDIR)/mk/pcc.mk
endif

ifdef _SUNPRO_C_
include $(SRCDIR)/mk/suncc.mk
endif

ifdef DISASM
ASMGEN=         $(OBJDUMP) $@ --disassemble-all > $(DISASM)
endif

ifdef SYMBOL
SYMGEN=         cp $@ $(SYMBOL)
endif

SUBDIR+=        $(SUBDIR-y)
OBJS+=          $(OBJS-y)
SRCS+=          $(SRCS-y)
ifeq ($(OBJS),)
OBJS+=          $(addsuffix .o,$(basename $(SRCS)))
endif

.SUFFIXES:
.SUFFIXES: .bin .a .o .S .c .cc .cpp .cxx .h

ifeq ($(_SILENT_),1)
echo-file=      @echo '  $(1) $(subst $(SRCDIR)/,,$(abspath $(2)))'

echo-files=     @(for d in $(2) _ ; do \
                  if [ "$$d" != "_" ]; then \
                    echo "  $(1) $(subst $(SRCDIR)/,,$(abspath $$d))" ; fi; \
                  done);
endif

#
# Inference rules
#
%.o: %.c
        $(call echo-file,CC     ,$<)
        $(CC) $(CFLAGS) $(CPPFLAGS) $(OUTPUT_OPTION) $<

%.o: %.S
        $(call echo-file,AS     ,$<)
        $(CPP) $(ACPPFLAGS) $(CPPFLAGS) $< $*.tmp
        $(AS) $(ASFLAGS) $(OUTPUT_OPTION) $*.tmp
        $(RM) $*.tmp


#
# Target
#
all: config $(SUBDIR) $(TARGET)


#
# Check configuration file
#
.PHONY: config
config:
ifndef ARCH
        @echo 'Error: You must run `configure` before make.'
        exit 1
endif

#
# Rules to process sub-directory
#
ifdef SUBDIR
.PHONY: $(SUBDIR)
$(SUBDIR): dummy
        @$(MAKE) -C $@
endif

-include Makefile.dep

#
# Depend
#
.PHONY: depend dep
depend dep:
ifdef SUBDIR
        @(for d in $(SUBDIR) _ ; do \
          if [ "$$d" != "_" ]; then $(MAKE) -C $$d depend; fi; \
        done);
endif
        $(RM) Makefile.dep
        @(for d in $(SRCS) _ ; do \
          if [ "$$d" != "_" ]; then \
          $(CPP) -M $(CPPFLAGS) $$d >> Makefile.dep; fi; \
        done);

#
# Lint
#
.PHONY: lint
lint:
ifdef SUBDIR
        @(for d in $(SUBDIR) _ ; do \
          if [ "$$d" != "_" ]; then $(MAKE) -C $$d lint; fi; \
        done);
endif
        @(for d in $(filter %.c, $(SRCS)) _ ; do \
          if [ "$$d" != "_" ]; then \
          echo ; \
          echo "Checking $$d" ; \
          $(LINT) $(CPPFLAGS) $(LINTFLAGS) $$d; fi; \
        done);

#
# Clean up
#
CLEANS= Makefile.dep $(TARGET) $(OBJS) $(DISASM) $(MAP) $(SYMBOL) $(CLEANFILES)

.PHONY: clean
clean:
ifdef SUBDIR
        @(for d in $(SUBDIR) _ ; do \
          if [ "$$d" != "_" ]; then $(MAKE) -C $$d clean; fi; \
        done);
endif
        $(call echo-files,CLEAN  ,$(CLEANS))
        $(RM) $(CLEANS)

.PHONY: dummy

#
# Build OS image
#
.PHINY: image
image: config $(TARGET)

endif # !_COMMON_MK_