03293b60ad
Using the implicit rules for libraries leads to problems if one of the objects fails to build, but the others are still OK. Just make all library rules explicit to avoid this.
146 lines
4 KiB
Makefile
146 lines
4 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_WITH_ROM_VARS))
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.PHONY: all
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# Pretty print output. Use "make Q=" to see full commands
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Q ?= @
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define pretty
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@printf "%8s %s\n" "$1" "$2"
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endef
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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 $(LINKERSCRIPT) -nostartfiles -static -export-dynamic -u_start -Wl,-Map=$(@:.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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ARFLAGS = cr
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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 use both a wildcard rule that links
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# $(SRCLIB) as well as target-specific rules that link $(SRCLIB_ROMVARS)
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# Normal targets (wildcard rule):
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%_$(BOARD).elf: $(OBJDIR)/%.o $(TARGET_OBJ) $(SRCLIB)
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$(call pretty,LINK,$@)
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$Q$(CC) $(LDFLAGS) -o $@ -Wl,--start-group $^ -lm -Wl,--end-group
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# Targets that need space for rom variables:
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define build_elf_rule
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$(1)_$$(BOARD).elf: $$(OBJDIR)/$(1).o $$(TARGET_OBJ) $$(SRCLIB_ROMVARS)
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$$(call pretty,LINK (romvars),$$@)
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$$Q$$(CC) $$(LDFLAGS) -o $$@ -Wl,--start-group $$^ -lm -Wl,--end-group
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endef
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$(foreach t, $(TARGETS_WITH_ROM_VARS), $(eval $(call build_elf_rule,$(t))))
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# Generic rules
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%.srec: %.elf
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$(call pretty,OBJCOPY,$@)
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$Q$(OBJCOPY) $(OBJCOPYFLAGS) -O srec $< $@
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%.ihex: %.elf
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$(call pretty,OBJCOPY,$@)
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$Q$(OBJCOPY) $(OBJCOPYFLAGS) -O ihex $< $@
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%.bin: %.elf
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$(call pretty,OBJCOPY,$@)
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$Q$(OBJCOPY) $(OBJCOPYFLAGS) -O binary $< $@
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%.dis: %.elf
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$(call pretty,OBJDUMP,$@)
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$Q$(OBJDUMP) -Sd $< > $@ || rm -f $@
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%.dis: %.o
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$(call pretty,OBJDUMP,$@)
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$Q$(OBJDUMP) -d $< > $@ || rm -f $@
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%.o: %.c $(FORCE_C_DEPENDS)
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$(call pretty,CC,$@)
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$Q$(CC) $(CFLAGS) $(CFLAGS_THUMB) -MMD -c -o $@ $<
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@$(FINALIZE_DEPENDENCY)
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%.o: %.S
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$(call pretty,AS,$@)
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$Q$(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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.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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