64 lines
2.1 KiB
Makefile
64 lines
2.1 KiB
Makefile
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# Usage:
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# $(1): Target prefix
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#
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# Generate build rules for files in variable <PREFIX>_SRCS. Use <PREFIX>_CFLAGS,
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# <PREFIX>_CXXFLAGS, <PREFIX>_ASFLAGS to control build flags.
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# Object files will be put into $BUILDDIR
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# E.g:
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# $(eval $(call COMPILE_RULES,AM_))
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define COMPILE_RULES
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$(1)OBJS := $$(addprefix $$(BUILDDIR)/, $$(addsuffix .o, $$($(1)SRCS)))
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### Rule (compile): a single `.c` -> `.c.o` (gcc)
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$$(filter %.c.o, $$($(1)OBJS)): $$(BUILDDIR)/%.c.o: %.c
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@mkdir -p $$(dir $$@) && echo + CC $$<
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@$$(CC) $$($(1)CFLAGS) -c -o $$@ $$(realpath $$<)
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### Rule (compile): a single `.cc` -> `.cc.o` (g++)
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$$(filter %.cc.o, $$($(1)OBJS)): $$(BUILDDIR)/%.cc.o: %.cc
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@mkdir -p $$(dir $$@) && echo + CXX $$<
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@$$(CXX) $$($(1)CXXFLAGS) -c -o $$@ $$(realpath $$<)
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### Rule (compile): a single `.cpp` -> `.cpp.o` (g++)
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$$(filter %.cpp.o, $$($(1)OBJS)): $$(BUILDDIR)/%.cpp.o: %.cpp
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@mkdir -p $$(dir $$@) && echo + CXX $$<
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@$$(CXX) $$($(1)CXXFLAGS) -c -o $$@ $$(realpath $$<)
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### Rule (compile): a single `.S` -> `.S.o` (gcc, which preprocesses and calls as)
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$$(filter %.S.o, $$($(1)OBJS)): $$(BUILDDIR)/%.S.o: %.S
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@mkdir -p $$(dir $$@) && echo + AS $$<
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@$$(AS) $$($(1)ASFLAGS) -c -o $$@ $$(realpath $$<)
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### Rule (`#include` dependencies): paste in `.d` files generated by gcc on `-MMD`
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-include $$(addprefix $$(BUILDDIR)/, $$(addsuffix .d, $$(filter %.c %.cc, $$($(1)SRCS))))
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endef
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# Usage:
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# $(1): Library build path
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# $(2): Library variable prefix
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# E.g:
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# $(eval $(call ADD_LIBRARY,am-riscv,AM_))
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define ADD_LIBRARY
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$(eval $(call COMPILE_RULES,$(2)))
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$(1): $$($(2)OBJS)
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@mkdir -p $$(dir $$@)
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@echo + AR "->" $$(patsubst $$(CURDIR)/%,%,$(1))
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@$$(AR) rcs $$@ $$($(2)OBJS)
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endef
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# Usage:
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# $(1): Image build path
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# $(2): Image variable prefix
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# E.g:
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# $(eval $(call ADD_IMAGE,dummy,DUMMY_))
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define ADD_IMAGE
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$(eval $(call COMPILE_RULES,$(2)))
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$(1).elf: $$($(2)OBJS)
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@mkdir -p $$(dir $$@)
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@echo + LD "->" $$(patsubst $$(CURDIR)/%,%,$(1).elf)
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@$$(LD) $$($(2)_LDFLAGS) -o $$@ --start-group $$($(2)OBJS) --end-group
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$(1).bin: $(1).elf
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@echo + OBJCOPY "->" $$(patsubst $$(CURDIR)/%,%,$(1))
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@$$(OBJCOPY) -S --set-section-flags .bss=alloc,contents -O binary $(1).elf $(1).bin
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endef
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