osd-contiki/Makefile.include
Jim Paris 0a41939407 Makefile cleanup.
This is an attempt to fix and cleanup all of the rules, and get rid of
some of the recursion.  We still need to invoke make several times
when we're building for more than one board, and some things can get a
bit weird when that happens, but it should generally work.  A single
BOARD=foo build should be fully correct, now.

I attempted to keep things compatible, so existing Makefiles that
include libmc1322x/Makefile.include should still work correctly.
2010-09-24 16:29:43 -04:00

124 lines
3.5 KiB
Makefile

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