大小端测试程序

1. 大小端测试程序

#include<stdio.h>
//return 0 is big_endian return 1 is small endian
int checkSystem()
{
    union check
    {
        int i;
        char ch;
    }c;
    c.i = 1;
    return (c.ch == 1);
}

int main()
{
    int j = 0;
    j = checkSystem();
    printf("ret=%d\n",j);
    printf("return 0 is big_endian return 1 is small endian\n");
    return 0;
}

Makefile

#CC=gcc
CC=arm-linux-gcc
CFLAGS= -g -Wall
TAR= big_little

ALL: $(TAR)

big_little:big_little.c
$(CC) $(CFLAGS) -o $@ $^