124 lines
3.5 KiB
Makefile
124 lines
3.5 KiB
Makefile
# Hey Emacs, this is a -*- makefile -*-
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# Set up a default target in case the user didn't already have one.
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# "all" means to build .bin for all defined targets for the currently-defined board
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all: $(addsuffix _$(BOARD).bin, $(TARGETS) $(TARGETS_ROMVARS))
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.PHONY: all
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# Don't delete intermediate targets
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.SECONDARY:
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#####
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# Tools and flags
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# Set up cross compiler and toolchain definitions.
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CROSS_COMPILE ?= arm-linux-
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AS = $(CROSS_COMPILE)as
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LD = $(CROSS_COMPILE)ld
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CC = $(CROSS_COMPILE)gcc
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CPP = $(CC) -E
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AR = $(CROSS_COMPILE)ar
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NM = $(CROSS_COMPILE)nm
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STRIP = $(CROSS_COMPILE)strip
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OBJCOPY = $(CROSS_COMPILE)objcopy
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OBJDUMP = $(CROSS_COMPILE)objdump
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RANLIB = $(CROSS_COMPILE)ranlib
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# Build CFLAGS and prepend it to user-supplied CFLAGS
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CFLAGS_PLAT ?= -march=armv4t -mtune=arm7tdmi-s -mlong-calls -msoft-float \
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-mthumb-interwork -fno-strict-aliasing -fno-common -ffixed-r8 \
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-ffunction-sections -ffreestanding -fno-builtin
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CFLAGS_WARN ?= -Wcast-align -Wall -Wstrict-prototypes -Wextra
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CFLAGS_OPT ?= -Os
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CFLAGS_DEBUG ?= -g -DDEBUG -Werror
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CFLAGS_MISC ?= -pipe
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CFLAGS := $(CFLAGS_PLAT) $(CFLAGS_WARN) $(CFLAGS_OPT) $(CFLAGS_DEBUG) $(CFLAGS_MISC) $(CFLAGS)
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# Thumb flags, used for building most objects
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CFLAGS_THUMB ?= -mthumb -mcallee-super-interworking
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# Linker flags
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LINKERSCRIPT ?= $(MC1322X)/mc1322x.lds
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LDFLAGS ?= -T $(LINKERSCRIPT) -nostartfiles -static -export-dynamic -Wl,-Map=$(@:.elf=.map)
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# Assembler flags
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AFLAGS ?= -Wa,-gstabs $(CFLAGS)
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# Misc tool options
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OBJCOPYFLAGS ?= --gap-fill=0xff
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#####
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include $(MC1322X)/board/Makefile.board
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include $(MC1322X)/lib/Makefile.lib
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include $(MC1322X)/src/Makefile.src
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#####
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# Rule for building ELF files. We generate both a wildcard rule
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# that links $(SRCLIB) as well as target-specific rules that link $(SRCLIB_ROMVARS)
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define build_elf_rule
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$(1)_$$(BOARD).elf: $$(OBJDIR)/$(1).o $$(OBJDIR)/board.a $$(MC1322X)/lib/libmc1322x.a $(2)
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$$(CC) $$(LDFLAGS) -o $$@ -Wl,--start-group $$^ -lm -Wl,--end-group
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endef
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# Targets that need space for rom variables:
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$(foreach t, $(TARGETS_ROMVARS), $(eval $(call build_elf_rule,$(t),$(SRCLIB_ROMVARS))))
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# All other targets (wildcard rule):
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$(eval $(call build_elf_rule,%,$(SRCLIB)))
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# Generic rules
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%.srec: %.elf
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$(OBJCOPY) $(OBJCOPYFLAGS) -O srec $< $@
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%.ihex: %.elf
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$(OBJCOPY) $(OBJCOPYFLAGS) -O ihex $< $@
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%.bin: %.elf
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$(OBJCOPY) $(OBJCOPYFLAGS) -O binary $< $@
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%.dis: %.elf
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$(OBJDUMP) -Sd $< > $@ || rm -f $@
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%.o: %.c
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$(CC) $(CFLAGS) $(CFLAGS_THUMB) -MMD -c -o $@ $<
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@$(FINALIZE_DEPENDENCY)
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%.o: %.S
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$(CC) $(AFLAGS) -MMD -c -o $@ $<
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@$(FINALIZE_DEPENDENCY)
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# Fix the dependencies generated for a particular target .o
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# See http://make.paulandlesley.org/autodep.html#advanced
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define FINALIZE_DEPENDENCY
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cp $(@:.o=.d) $(@:.o=.$$$$); \
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sed -e 's/#.*//' -e 's/^[^:]*: *//' -e 's/ *\\$$//' \
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-e '/^$$/ d' -e 's/$$/ :/' < $(@:.o=.$$$$) >> $(@:.o=.d); \
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rm -f $(@:.o=.$$$$)
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endef
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clean::
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rm -f *.{o,d,a,bin,elf,ihex,srec,dis,map,bak} *~
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rm -rf obj_*
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.PHONY: clean
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##############################
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# If no single board was specified, invoke make recursively for each
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# board in $(BOARDS), or $(ALL_BOARDS) if that wasn't specified either.
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# This is at the end so that it can override all other targets.
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ifndef BOARD
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ifneq ($(MAKECMDGOALS),clean)
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.DEFAULT_GOAL=mc1322x-default
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BOARDS ?= $(ALL_BOARDS)
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define build_board
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@echo "Building for board: $(1)"
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@$(MAKE) --no-print-directory BOARD=$(1) $(2)
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endef
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$(MAKECMDGOALS):
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$(foreach b, $(BOARDS), $(call build_board,$(b),$@))
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mc1322x-default:
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$(foreach b, $(BOARDS), $(call build_board,$(b),))
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endif
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endif
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