Makefile只能执行一次配置吗？ [英] Makefile can I execute a configuration only once?

问题描述

我试图创建一个可以编译一些文件并创建一些输出的Makefile，但首先我希望它仅执行一次配置，下次我键入一次使其不重新执行配置，除非我更改参数，例如前缀。

Im trying to create a Makefile which compiles some files and creates some outputs but first I want it to execute the configuration only one time and the next time I type make it wont re-execute the configuration unless I change the parameters for example the prefix.

我尝试使用 touch，FORCE和if ，在其他帖子中搜索了一下之后，但是我在gcc和Makefiles中是新手，所以我无法做到

I tried using touch , FORCE and if, after searching a bit in other posts but Im newbie in gcc and Makefiles so I cant make it work.

我的代码现在是（不包括其他规则，因为它们不会影响配置）：

My code now is (did not include the other rules because they dont affect the configuration):

XLEN := 32
RISCV_PREFIX := riscv$(XLEN)-unknown-elf-
RISCV_GCC := $(RISCV_PREFIX)gcc
CFLAGS := -O2
WORKING_DIR:= $(shell pwd)
LIBRARY_DIR:= $(abspath $(dir $(lastword $(MAKEFILE_LIST)))/..)
B := $(shell echo $(LIBRARY_DIR))
$(info $(B))

--->（仅执行一次）---> 配置：=配置--prefix = $（LIBRARY_DIR）--with-arch = rv32if --with-abi = ilp32d

RISCV_TEST_DIR:=$(shell pwd)
SCRIPTDIR:=$(RISCV_TEST_DIR)/../../tools

RISCV_OPTIONS = -o  
RISCV_LINK = $(RISCV_GCC) $(PROGRAMS) $(RISCV_OPTIONS) $@ $(CFLAGS) #produces .elf file!
RISCV_OBJDUMP = $(RISCV_PREFIX)objdump -D                           #produces a dump file to see the assembly code!
RISCV_OBJCOPY = $(RISCV_PREFIX)objcopy -O binary                    #produces a bin file!

%.elf: %.c
    $(info Generating .elf file from files: $(PROGRAMS_NO_EX))
    $(RISCV_LINK)
    $(info Success!)
    $(info ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~)
%.dump: %.elf
    $(info Copying assembly to dump file $(PROGRAMS_NO_EX).dump)
    @$(RISCV_OBJDUMP) $< > $@
    $(info Success!)
    $(info ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~)
%.bin: %.elf
    $(info Generating bin file)
    @$(RISCV_OBJCOPY) $< $@
    $(info Success!)
    $(info ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~)
%.hex: %.bin 
    $(info Generating hex file)
    echo cd $(SCRIPTDIR)
    $(info Running binary to hex >>>)
    python $(SCRIPTDIR)/bin2hex.py $< -a 0x0 > $@ || exit -1
    $(info Hex Generation Successful!)
    $(info ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~)

all: $(PROGRAMS_TO_CREATE); if [ -a $(LIBRARY_DIR)/config.status ]; then cd $(LIBRARY_DIR) && $(CONFIGURATION); fi;

configure: config.status
    touch configure

config.status:
    cd $(LIBRARY_DIR) && $(CONFIGURATION);

.PHONY: all clean
clean:
    $(info Cleaning files...)
    @rm -rf *.elf *.hex *.map *.objdump *.i *.s *.bin *.dump
    $(info Done cleaning!)

谢谢您！

推荐答案

在@raspy的帮助下解决这样的问题：

With @raspy's help managed to solve the problem like this:

all: $(PROGRAMS_TO_CREATE)
$(PROGRAMS_TO_CREATE):$(LIBRARY_DIR)/config.status

$(LIBRARY_DIR)/config.status: 
    cd $(LIBRARY_DIR) && $(CONFIGURATION)

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