我重构了一些C代码，我尝试将它编译为mac上的clang上的lib而不是linux上的gcc。
首先，如果我只是运行make命令，我在第一个文件编译时遇到错误：
+++ Compiling [sys_msg.c]
clang: error: unsupported argument '-adhlns=../../src/sys_msg.lst' to option 'Wa,'
所以我删除了创建此错误的-Wa,-adhlns=$(<:.c=.lst)选项。
之后一切似乎都在编译，但是最后一个.a文件的汇编失败了，我不明白为什么。
这是我的输出：
+++ Creation of [../../hal/stub/obj]
+++ Dependencies of [hal.c]
+++ Dependencies of [target.c]
+++ Dependencies of [robus.c]
+++ Dependencies of [reception.c]
+++ Dependencies of [sys_msg.c]
+++ Compiling [sys_msg.c]
+++ Compiling [reception.c]
+++ Compiling [robus.c]
+++ Compiling [target.c]
+++ Compiling [hal.c]
ar -rv ../../hal/stub/libstub.a
ar: no archive members specified
usage: ar -d [-TLsv] archive file ...
ar -m [-TLsv] archive file ...
ar -m [-abiTLsv] position archive file ...
ar -p [-TLsv] archive [file ...]
ar -q [-cTLsv] archive file ...
ar -r [-cuTLsv] archive file ...
ar -r [-abciuTLsv] position archive file ...
ar -t [-TLsv] archive [file ...]
ar -x [-ouTLsv] archive [file ...]
make: *** [../../hal/stub/libstub.a] Error 1
这是我的makefile：
# make all = Make software and program
# make clean = Clean out built project files.
# make program = Download the hex file to the device, using avrdude. Please
# customize the avrdude settings below first!
# make docs = compile with doxygen the code documentation
# Maximum I2C speed (HZ)
SCLFREQ = 400000
#-------------------------------------------------------------------------------
# Tools
#-------------------------------------------------------------------------------
# Set DEBUG variable for once if not coming from command line
ifndef DEBUG
DEBUG = 0
endif
# Tool suffix when cross-compiling
CROSS_COMPILE ?=
# Compilation tools
CC = $(CROSS_COMPILE)gcc
AR = $(CROSS_COMPILE)ar
SIZE = $(CROSS_COMPILE)size
STRIP = $(CROSS_COMPILE)strip
OBJCOPY = $(CROSS_COMPILE)objcopy
OBJDUMP = $(CROSS_COMPILE)objdump
SIZE = $(CROSS_COMPILE)size
GDB = $(CROSS_COMPILE)gdb
NM = $(CROSS_COMPILE)nm
ROOT_PATH = ../..
HAL_PATH = $(ROOT_PATH)/hal/$(BOARD)
DOC_PATH = $(ROOT_PATH)/../extra/Docs
# Doxygen configuration file name
DOXYFILE = $(ROOT_PATH)/../extra/.Doxyfile
OBJ_PATH = $(HAL_PATH)/obj
OUTPUT_NAME = lib$(BOARD)
OUTPUT_FILE_PATH = $(HAL_PATH)/$(OUTPUT_NAME).a
#|---------------------------------------------------------------------------------------|
#| Source files |
#|---------------------------------------------------------------------------------------|
include ../sources.mk
#|---------------------------------------------------------------------------------------|
#| Extract file names and path |
#|---------------------------------------------------------------------------------------|
PROJ_ASRCS = $(filter %.s,$(foreach file,$(SOURCES),$(file)))
PROJ_ASRCS += $(filter %.S,$(foreach file,$(SOURCES),$(file)))
PROJ_CSRCS = $(filter %.c,$(foreach file,$(SOURCES),$(file)))
PROJ_CPPSRCS = $(filter %.cpp,$(foreach file,$(SOURCES),$(file)))
#|---------------------------------------------------------------------------------------|
#| Set important path variables |
#|---------------------------------------------------------------------------------------|
VPATH = $(foreach path,$(sort $(foreach file,$(SOURCES),$(dir $(file)))),$(path) :)
INC_PATH = $(INCLUDES)
LIB_PATH = -L$(dir $(RESOURCES_LINKER))
#|---------------------------------------------------------------------------------------|
#| Options for compiler binaries |
#|---------------------------------------------------------------------------------------|
COMMON_FLAGS = \
-g -O$(OPT) \
-funsigned-char -fpack-struct -fshort-enums \
-Wall -Wstrict-prototypes \
-DMCU=$(MCU) \
-DMAINCLOCK=$(MAINCLOCK) \
-DSCLFREQ=$(SCLFREQ) \
$(INCLUDES)
ifeq ($(CROSS_COMPILE),avr-)
COMMON_FLAGS += -mmcu=$(MCU)
ASFLAGS = -mmcu=$(MCU)
endif
CFLAGS += $(COMMON_FLAGS) -std=gnu99
CPPFLAGS = $(COMMON_FLAGS) -std=gnu++11 -fno-rtti -fno-exceptions
ASFLAGS += -Wa,-adhlns=$(<:.S=.lst),-gstabs -I. -x assembler-with-cpp
LDFLAGS = -Wl,-Map=$(BOARD).map,--cref
#|---------------------------------------------------------------------------------------|
#| Define targets |
#|---------------------------------------------------------------------------------------|
#AOBJS += $(patsubst %.S,%.o,$(PROJ_ASRCS))
AOBJS = $(patsubst %.s,%.o,$(addprefix $(OBJ_PATH)/, $(notdir $(PROJ_ASRCS))))
COBJS = $(patsubst %.c,%.o,$(addprefix $(OBJ_PATH)/, $(notdir $(PROJ_CSRCS))))
CPPOBJS = $(patsubst %.cpp,%.o,$(addprefix $(OBJ_PATH)/, $(notdir $(PROJ_CPPSRCS))))
.PHONY: all clean print_info packaging
all: $(OUTPUT_FILE_PATH)
print_info:
@echo DEFAULT_GOAL ---------------------------------------------------------------------------------
@echo $(.DEFAULT_GOAL)
@echo VPATH ---------------------------------------------------------------------------------
@echo $(VPATH)
@echo SOURCES -------------------------------------------------------------------------------
@echo $(SOURCES)
# @echo PROJ_ASRCS ----------------------------------------------------------------------------
# @echo $(PROJ_ASRCS)
# @echo AOBJS ---------------------------------------------------------------------------------
# @echo $(AOBJS)
@echo PROJ_CSRCS ----------------------------------------------------------------------------
@echo $(PROJ_CSRCS)
@echo COBJS ---------------------------------------------------------------------------------
@echo $(COBJS)
@echo PROJ_CPPSRCS --------------------------------------------------------------------------
@echo $(PROJ_CPPSRCS)
@echo CPPOBJS -------------------------------------------------------------------------------
@echo $(CPPOBJS)
@echo ---------------------------------------------------------------------------------------
@echo $(CURDIR)
@echo $(OUTPUT_FILE_PATH)
@echo ---------------------------------------------------------------------------------------
$(OUTPUT_FILE_PATH): $(OBJ_PATH) ../rules.mk ../sources.mk $(HAL_PATH)/Makefile $(AOBJS) $(COBJS) $(CPPOBJS)
$(AR) -rv $(OUTPUT_FILE_PATH) $(AOBJS)
$(AR) -rv $(OUTPUT_FILE_PATH) $(COBJS)
$(AR) -rv $(OUTPUT_FILE_PATH) $(CPPOBJS)
$(NM) $(OUTPUT_FILE_PATH) > $(HAL_PATH)/$(OUTPUT_NAME)_symbols.txt
#|---------------------------------------------------------------------------------------|
#| Compile or assemble |
#|---------------------------------------------------------------------------------------|
$(AOBJS): $(OBJ_PATH)/%.o: %.s
@echo +++ Assembling [$(notdir $<)]
@$(AS) $(AFLAGS) $< -o $@
$(AOBJS): $(OBJ_PATH)/%.o: %.S
@echo +++ Assembling [$(notdir $<)]
@$(AS) $(AFLAGS) $< -o $@
$(COBJS): $(OBJ_PATH)/%.o: %.c
@echo +++ Compiling [$(notdir $<)]
@$(CC) $(CFLAGS) -c $< -o $@
$(CPPOBJS): $(OBJ_PATH)/%.o: %.cpp
@echo +++ Compiling [$(notdir $<)]
@$(CC) $(CPPFLAGS) -c $< -o $@
#|---------------------------------------------------------------------------------------|
#| Output folder |
#|---------------------------------------------------------------------------------------|
$(OBJ_PATH):
@echo +++ Creation of [$@]
@-mkdir $(OBJ_PATH)
#|---------------------------------------------------------------------------------------|
#| Cleanup |
#|---------------------------------------------------------------------------------------|
clean:
-rm -f $(OBJ_PATH)/* $(OBJ_PATH)/*.*
-rmdir $(OBJ_PATH)
-rm -f $(OUTPUT_FILE_PATH)
-rm -f $(HAL_PATH)/$(OUTPUT_NAME)_symbols.txt
-rm -rf $(DOC_PATH)
#|---------------------------------------------------------------------------------------|
#| Dependencies |
#|---------------------------------------------------------------------------------------|
$(OBJ_PATH)/%.d: %.s $(OBJ_PATH)
@echo +++ Dependencies of [$(notdir $<)]
@$(CC) $(AFLAGS) -MM -c $< -MT $(basename $@).o -o $@
$(OBJ_PATH)/%.d: %.S $(OBJ_PATH)
@echo +++ Dependencies of [$(notdir $<)]
@$(CC) $(AFLAGS) -MM -c $< -MT $(basename $@).o -o $@
$(OBJ_PATH)/%.d: %.c $(OBJ_PATH)
@echo +++ Dependencies of [$(notdir $<)]
@$(CC) $(CFLAGS) -MM -c $< -MT $(basename $@).o -o $@
$(OBJ_PATH)/%.d: %.cpp $(OBJ_PATH)
@echo +++ Dependencies of [$(notdir $<)]
@$(CC) $(CPPFLAGS) -MM -c $< -MT $(basename $@).o -o $@
#|---------------------------------------------------------------------------------------|
#| Include dependencies, if existing |
#| Little trick to avoid dependencies build for some rules when useless |
#| CAUTION: this won't work as expected with 'make clean all' |
#|---------------------------------------------------------------------------------------|
DEP_EXCLUDE_RULES := clean print_info
ifeq (,$(findstring $(MAKECMDGOALS), $(DEP_EXCLUDE_RULES)))
-include $(AOBJS:%.o=%.d)
-include $(COBJS:%.o=%.d)
-include $(CPPOBJS:%.o=%.d)
endif
#|---------------------------------------------------------------------------------------|
#| Module packaging for Arduino IDE Board Manager |
#|---------------------------------------------------------------------------------------|
packaging: $(OUTPUT_FILE_PATH)
docs: ( cat $(DOXYFILE) ; echo "OUTPUT_DIRECTORY = $(DOC_PATH)" ; echo "INPUT = $(DOC_SOURCES)" ) | doxygen -
# doxygen $(DOXYFILE)
%.d:
为什么clang会提请我这个？
感谢@MadScientist 我理解为什么我有这个错误，如果我在我的作品上打印出来的东西：
$make print_info
DEFAULT_GOAL ---------------------------------------------------------------------------------
all
VPATH ---------------------------------------------------------------------------------
../../hal/stub/ : ../../src/ :
SOURCES -------------------------------------------------------------------------------
../../src/sys_msg.c ../../src/reception.c ../../src/robus.c ../../src/target.c ../../hal/stub/hal.c
PROJ_ASRCS ----------------------------------------------------------------------------
AOBJS ---------------------------------------------------------------------------------
PROJ_CSRCS ----------------------------------------------------------------------------
../../src/sys_msg.c ../../src/reception.c ../../src/robus.c ../../src/target.c ../../hal/stub/hal.c
COBJS ---------------------------------------------------------------------------------
../../hal/stub/obj/sys_msg.o ../../hal/stub/obj/reception.o ../../hal/stub/obj/robus.o ../../hal/stub/obj/target.o ../../hal/stub/obj/hal.o
PROJ_CPPSRCS --------------------------------------------------------------------------
CPPOBJS -------------------------------------------------------------------------------
---------------------------------------------------------------------------------------
/Users/nico/Documents/pollen/Robus/robus/hal/stub
../../hal/stub/libstub.a
---------------------------------------------------------------------------------------
我的错误来自于makefile的这一部分：
PROJ_ASRCS = $(filter %.s,$(foreach file,$(SOURCES),$(file)))
PROJ_ASRCS += $(filter %.S,$(foreach file,$(SOURCES),$(file)))
我不想包含所有.o因为我做了多次编译，我只想列出所需的文件。
我的编译过程与ExperimentalCore-sam项目相同。
我该怎么做？
答案 0 :(得分：1)
我只能假设变量AOBJS为空。回到它创建的位置，我只能假设这意味着.s变量中没有列出.S或SOURCES个文件。
为什么不运行$(AR)的单个调用，只使用$^自动变量并过滤掉.o个文件，而不是$(AR)的三个不同调用命令？
$(AR) -rv $(OUTPUT_FILE_PATH) $(filter %.o,$^)
编辑要明确我建议您将输出目标规则更改为：
$(OUTPUT_FILE_PATH): $(OBJ_PATH) ../rules.mk ../sources.mk $(HAL_PATH)/Makefile $(AOBJS) $(COBJS) $(CPPOBJS)
$(AR) -rv $(OUTPUT_FILE_PATH) $(filter %.o,$^)
$(NM) $(OUTPUT_FILE_PATH) > $(HAL_PATH)/$(OUTPUT_NAME)_symbols.txt
或者，如果你想更正确地说：
$(OUTPUT_FILE_PATH): $(OBJ_PATH) ../rules.mk ../sources.mk $(HAL_PATH)/Makefile $(AOBJS) $(COBJS) $(CPPOBJS)
$(AR) -rv $@ $(filter %.o,$^)
$(NM) $@ > $(HAL_PATH)/$(OUTPUT_NAME)_symbols.txt
如上所述，我肯定会从先决条件列表中删除$(OBJ_PATH)。
答案 1 :(得分：1)
我理解GCC和Clang之间的区别。
如果您运行ar命令而未指定存档成员，则使用GCC，他只是跳过该步骤。
Clang在这种情况下引发错误并停止构建。
要修补它，我只是检查我的列表是否为空：
$(OUTPUT_FILE_PATH): $(OBJ_PATH) ../rules.mk ../sources.mk $(HAL_PATH)/Makefile $(AOBJS) $(COBJS) $(CPPOBJS)
ifneq ($(strip $(AOBJS)),)
$(AR) -rv $(OUTPUT_FILE_PATH) $(AOBJS)
endif
ifneq ($(strip $(COBJS)),)
$(AR) -rv $(OUTPUT_FILE_PATH) $(COBJS)
endif
ifneq ($(strip $(CPPOBJS)),)
$(AR) -rv $(OUTPUT_FILE_PATH) $(CPPOBJS)
endif