需要 Makefile 专家

Question

任何对 makefile 有所了解的人都可以帮助我解决这个问题吗？这不是我写的，还有很多我以前从未见过的东西。

#---------------------------------------------------------------------------------
# Clear the implicit built in rules
#---------------------------------------------------------------------------------
.SUFFIXES:
#---------------------------------------------------------------------------------
ifeq ($(strip $(DEVKITARM)),)
$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM)
endif

include $(DEVKITARM)/gba_rules

#---------------------------------------------------------------------------------
# TARGET is the name of the output, if this ends with _mb a multiboot image is generated
# BUILD is the directory where object files & intermediate files will be placed
# SOURCES is a list of directories containing source code
# DATA is a list of directories containing data files
# INCLUDES is a list of directories containing header files
#---------------------------------------------------------------------------------
TARGET      :=  $(shell basename $(CURDIR))
BUILD       :=  build
SOURCES     :=  source
DATA        :=
GRAPHICS    :=  gfx 
INCLUDES    :=

#---------------------------------------------------------------------------------
# options for code generation
#---------------------------------------------------------------------------------
ARCH    :=  -mthumb -mthumb-interwork

CFLAGS  :=  -g -Wall -O3\
        -mcpu=arm7tdmi -mtune=arm7tdmi\
        -fomit-frame-pointer\
        -ffast-math \
        $(ARCH)

CFLAGS  +=  $(INCLUDE)

CXXFLAGS    :=  $(CFLAGS) -fno-rtti -fno-exceptions

ASFLAGS :=  $(ARCH)
LDFLAGS =   -g $(ARCH) -Wl,-Map,$(notdir $@).map

#---------------------------------------------------------------------------------
# any extra libraries we wish to link with the project
#---------------------------------------------------------------------------------
LIBS    :=  -lgba

#---------------------------------------------------------------------------------
# list of directories containing libraries, this must be the top level containing
# include and lib
#---------------------------------------------------------------------------------
LIBDIRS :=  $(LIBGBA)

#---------------------------------------------------------------------------------
# no real need to edit anything past this point unless you need to add additional
# rules for different file extensions
#---------------------------------------------------------------------------------
ifneq ($(BUILD),$(notdir $(CURDIR)))
#---------------------------------------------------------------------------------

export OUTPUT   :=  $(CURDIR)/$(TARGET)
export VPATH    :=  $(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \
            $(foreach dir,$(DATA),$(CURDIR)/$(dir))

export DEPSDIR  :=  $(CURDIR)/$(BUILD)

#---------------------------------------------------------------------------------
# automatically build a list of object files for our project
#---------------------------------------------------------------------------------
CFILES      :=  $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c)))
CPPFILES    :=  $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp)))
SFILES      :=  $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s)))
BINFILES    :=  $(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*)))
BMPFILES    :=  $(foreach dir,$(GRAPHICS),$(notdir $(wildcard $(dir)/*.bmp)))

#---------------------------------------------------------------------------------
# use CXX for linking C++ projects, CC for standard C
#---------------------------------------------------------------------------------
ifeq ($(strip $(CPPFILES)),)
#---------------------------------------------------------------------------------
    export LD   :=  $(CC)
#---------------------------------------------------------------------------------
else
#---------------------------------------------------------------------------------
    export LD   :=  $(CXX)
#---------------------------------------------------------------------------------
endif
#---------------------------------------------------------------------------------

export OFILES   :=  $(addsuffix .o,$(BINFILES)) \
                    $(BMPFILES:.bmp=.o) \
                    $(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o)

#---------------------------------------------------------------------------------
# build a list of include paths
#---------------------------------------------------------------------------------
export INCLUDE  :=  $(foreach dir,$(INCLUDES),-I$(CURDIR)/$(dir)) \
            $(foreach dir,$(LIBDIRS),-I$(dir)/include) \
            -I$(CURDIR)/$(BUILD)

#---------------------------------------------------------------------------------
# build a list of library paths
#---------------------------------------------------------------------------------
export LIBPATHS :=  $(foreach dir,$(LIBDIRS),-L$(dir)/lib)

.PHONY: $(BUILD) clean

#---------------------------------------------------------------------------------
$(BUILD):
    @[ -d $@ ] || mkdir -p $@
    @make --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile

all : $(BUILD)
#---------------------------------------------------------------------------------
clean:
    @echo clean ...
    @rm -fr $(BUILD) $(TARGET).elf $(TARGET).gba

#---------------------------------------------------------------------------------
else

DEPENDS :=  $(OFILES:.o=.d)

#---------------------------------------------------------------------------------
# main targets
#---------------------------------------------------------------------------------
$(OUTPUT).gba   :   $(OUTPUT).elf

$(OUTPUT).elf   :   $(OFILES)


#---------------------------------------------------------------------------------
# The bin2o rule should be copied and modified
# for each extension used in the data directories
#---------------------------------------------------------------------------------

#---------------------------------------------------------------------------------
# This rule links in binary data with the .bin extension
#---------------------------------------------------------------------------------
%.bin.o :   %.bin
#---------------------------------------------------------------------------------
    @echo $(notdir $<)
    @$(bin2o)

#---------------------------------------------------------------------------------
# This rule links in binary data with the .raw extension
#---------------------------------------------------------------------------------
%.raw.o :   %.raw
#---------------------------------------------------------------------------------
    @echo $(notdir $<)
    @$(bin2o)

#---------------------------------------------------------------------------------
# This rule creates assembly source files using grit
# grit takes an image file and a .grit describing how the file is to be processed
# add additional rules like this for each image extension
# you use in the graphics folders 
#---------------------------------------------------------------------------------
%.s %.h : %.bmp %.grit
#---------------------------------------------------------------------------------
    grit $< -fts -o$*

-include $(DEPENDS)

#---------------------------------------------------------------------------------
endif
#---------------------------------------------------------------------------------

我的问题在于生成规则 .bmp 文件。在底部，您可以看到应该为 /gfx 目录中的所有 .bmp 文件调用的规则（现在，只有 bg.bmp 和 bg.grit）。以前，我会收到错误“没有规则来制作 bg.o 需要的目标 bg.s”，尽管对我来说，最后一条规则显然应该适用于所有 .s 文件。删除整个 /build 目录并重试后，我现在得到“没有规则使 2048.elf 需要目标 bg.o”

我可以验证手动运行 grit (grit bg.bmp -fts -obg.s) 在构建文件夹中生成 bg.s 和 bg.h 文件。

Answer 1

您可能希望将GRAPHICS 目录添加到VPATH，就像您为SOURCES 和DATA 所做的那样。否则 make 将很难确定 bmp 文件的位置，并且无法确定如何制作相应的目标文件。