在Ubuntu上使用Makefile编译时出现问题

Question

PREFACE: I gotta admit that I am a complete noob to Ubuntu and all its quirks, so please be gentle.

So I've got this program that we use for an assignment we have worked on it at the computer lab at uni - and it works perfectly there. When I try to compile on my home computer It gives me this:

Compiling project
/usr/lib/gcc/arm-none-eabi/6.3.1/../../../arm-none-eabi/bin/ld: error: 
/usr/lib/gcc/arm-none-eabi/6.3.1/../../../arm-none-eabi/lib/crt0.o: Conflicting CPU architectures 12/1
/usr/lib/gcc/arm-none-eabi/6.3.1/../../../arm-none-eabi/bin/ld: failed to merge target specific data of file /usr/lib/gcc/arm-none-eabi/6.3.1/../../../arm-none-eabi/lib/crt0.o
collect2: error: ld returned 1 exit status
Makefile:34: recipe for target 'default' failed
make: *** [default] Error 1

Before this I am just calling make in the folder where the program and the makefile is situated. Since it works fine on the school computer and I get the "Conflicting CPU architecture" error I am inclined to believe there is an error either with my Ubuntu or the GCC installation.

Ubuntu Version:

No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04.2 LTS
Release:        18.04
Codename:       bionic

FAMILY := nrf51
SOURCES := main.c uart.c

BUILD_DIR := .build_system
LINKER_SCRIPT := $(BUILD_DIR)/linker_script.ld

GNU_PREFIX  := arm-none-eabi
CC          := $(GNU_PREFIX)-gcc
OBJCOPY     := $(GNU_PREFIX)-objcopy
OBJDUMP     := $(GNU_PREFIX)-objdump

QUIET := @

## Compiler flags
# CPU specific
CFLAGS += -mcpu=cortex-m0 -mthumb -mabi=aapcs -mfloat-abi=soft
# Get linker optimization for free
CFLAGS += -ffunction-sections -fdata-sections --short-enums
CFLAGS += -fno-strict-aliasing -fno-builtin
# Good pracice
CFLAGS += -Wall -Werror -std=gnu99
# CFLAGS += -ggdb -Og / -O0 / -O3 etc

## Linker flags
CFLAGS += --specs=nosys.specs -Wl,--gc-sections -T $(LINKER_SCRIPT)
# or --specs=nano.specs -lc -lnosys

SOURCES += $(BUILD_DIR)/system_nrf51.c
SOURCES += $(BUILD_DIR)/gcc_startup_nrf51.S

.PHONY: default flash clean

default:
    @echo Compiling project
    $(QUIET)$(CC) $(CFLAGS) $(SOURCES) -o $(BUILD_DIR)/main.elf
    @echo Creating hex file
    $(QUIET)$(OBJCOPY) -O ihex $(BUILD_DIR)/main.elf $(BUILD_DIR)/main.hex

flash:
    nrfjprog -f $(FAMILY) --sectorerase --program $(BUILD_DIR)/main.hex
    nrfjprog -f $(FAMILY) --reset

erase:
    nrfjprog -f $(FAMILY) --eraseall

clean:
    $(QUIET)rm $(BUILD_DIR)/main.{elf,hex}

Answer 1

Your makefile has hard-coded tool-chains specific to arm. You could tweak it slightly so that it can work on x86:

FAMILY := nrf51
SOURCES := main.c uart.c

BUILD_DIR := .build_system
LINKER_SCRIPT := $(BUILD_DIR)/linker_script.ld

arch = $(shell uname -m)

# Intel 64-bit machine?
ifeq ($(arch),x86_64)
CC          := gcc
OBJCOPY     := objcopy
OBJDUMP     := objdump
else
# Default to arm
GNU_PREFIX  := arm-none-eabi
CC          := $(GNU_PREFIX)-gcc
OBJCOPY     := $(GNU_PREFIX)-objcopy
OBJDUMP     := $(GNU_PREFIX)-objdump

# ARM CPU specific
CFLAGS += -mcpu=cortex-m0 -mthumb -mabi=aapcs -mfloat-abi=soft
endif

QUIET := @

...

Note that I put the CFLAGS inside the condition as well as they are arm specific too. You can similarly adjust if you want to run on other CPU architectures.