Question

这是我编译器的Makefile。

CC = arm-none-eabi-gcc
AS = arm-none-eabi-as
LD = arm-none-eabi-ld
OD = arm-none-eabi-objdump

CFLAGS = -g -c -O1 -mcpu=cortex-m0 -mthumb
AFLAGS = -g -c -mcpu=cortex-m0 -mthumb
LDFLAGS = -g -mcpu=cortex-m0 -mthumb --specs=rdimon.specs -lc -lrdimon
ODFLAGS = -d

all: HW1.elf

test: HW1.elf
        @ echo "...copying"
        qemu-system-arm  -machine versatilepb -cpu cortex-m3 -nographic -monitor null -serial null -semihosting -k\
ernel HW1.elf

HW1.elf: test.o t1.o
        $(CC) $(LDFLAGS) test.o t1.o -o HW1.elf

test.o: test.c t1.o
        @ echo ".compiling"
        $(CC) $(CFLAGS) test.c t1.o -o test.o

t1.o: t1.s
        @ echo ".assembling"
        $(AS) $(AFLAGS) t1.s -o t1.o

clean:
        rm -rf t1.o test.o HW1.elf

当我make all时，我得到了

.assembling
arm-none-eabi-as -g -c -mcpu=cortex-m0 -mthumb t1.s -o t1.o
.compiling
arm-none-eabi-gcc -g -c -O1 -mcpu=cortex-m0 -mthumb test.c t1.o -o test.o
arm-none-eabi-gcc: warning: t1.o: linker input file unused because linking not done
arm-none-eabi-ld -g -mcpu=cortex-m0 -mthumb --specs=rdimon.specs -lc -lrdimon test.o -o HW1.elf
arm-none-eabi-ld: unrecognised emulation mode: thumb
Supported emulations: armelf
make: *** [HW1.elf] Error 1

我查看了StackOverflow上的numberly collect2错误，发现有一个函数未定义或被错误标记。

我已进入〜/ .bashrc文件中的目录来调用arm-none-eabi库函数。我知道这个错误与t1.s和/或test.c文件无关，而只是与处理我的makefile的不正确的符号有关，但我对于我做错了什么感到迷茫。我知道这是test.o的内容。

我将提供test.c和t1.s，以防它们出现问题。

test.c的

include <stdio.h>

extern int inc(int);

#define RED_COUNT 5
#define YELLOW_COUNT 2
#define GREEN_COUNT 5

enum light_states {RED, YELLOW, GREEN};
static int state = RED;

void stop_light () {
  static int state_counter = 0;

  switch (state) {
  case RED:
    printf("RED\n");
    if (++state_counter >= RED_COUNT) {
      state_counter = 0;
      state = GREEN;
    }
    break;

  case GREEN:
    printf("GREEN\n");
    if (++state_counter >= GREEN_COUNT) {
      state_counter = 0;
      state = YELLOW;
    }
    break;

  case YELLOW:
    printf("YELLOW\n");
    if (++state_counter >= YELLOW_COUNT) {
      state_counter = 0;
      state = RED;
    }
    break;

  default:
    state = RED;
    state_counter = 0;
    break;
  }
}

main(){
  int i;

  while (i < 36) {
    stop_light();
    i = inc(i);
  }
}

t1.s

    .text
    .syntax unified
    .thumb
    .global inc
    .type   inc, %function
inc:
    adds    r0,r0,#1
    bx  lr

编辑1： 更新了缺少的'-c'，现在收到关于LD的新错误。

编辑2： 更新了LD错误。现在一切都已修好，答案非常有帮助！

在C中获取“collect2：error：ld返回1退出状态”

0 个答案: