cross compiling for ARM mini2440

I am using linux version 14.04. I used the below program for real time clock in ARM mini2440.


#include<sys/ioctl.h>
#include<stdio.h>
#include<fcntl.h>
#include<stdlib.h>
#include<linux/rtc.h>

int main(void)
{
int fd,ret ;
struct rtc_time time;

time.tm_sec=10;
time.tm_min=50;
time.tm_hour=11;
time.tm_mday=1;
time.tm_mon=2;
time.tm_year=104;
time.tm_wday=4;
time.tm_yday=5;
time.tm_isdst=6;

fd = open("/dev/rtc0",O_RDWR);
if(fd<0)
{
printf("open failed\n");
exit(1);
}

ret = ioctl(fd, RTC_SET_TIME, &time);

if(ret==-1)
{
perror("ioctl failed ret");
}
close(fd);
return 0;

}



After writing the program I cross compiled using the command
$ arm-linux-gnueabi-gcc-static -o newwrite newwrite.c

After this I copied the newwrite file into pendrive and used the pendrive in ARM mini2440. I created new directory "newdir", and mount the files in pendrive to new directory "newdir" using the command
$ mount /dev/udisk ./newdir

when I compile the file
./newwrite
It shows error illegal instruction
please help me as I am new to this field

Start with something simple, like a hello world program. Once you know how to cross-compile for your processor properly, then you can step it up to a program you care about.

You may need to add some flags to your compilation, like march, mmcu, etc.

Also it looks like the mini2440 has ethernet. Your turn around time will be much faster if you just scp the file over instead of passing a thumb drive back and forth, not to mention the havoc fat32 thumb drives can wreak on your file permissions.

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Originally Posted by suicidaleggroll Start with something simple, like a hello world program. Once you know how to cross-compile for your processor properly, then you can step it up to a program you care about. You may need to add some flags to your compilation, like march, mmcu, etc. Also it looks like the mini2440 has ethernet. Your turn around time will be much faster if you just scp the file over instead of passing a thumb drive back and forth, not to mention the havoc fat32 thumb drives can wreak on your file permissions.

If possible, it is even faster if you can do an NFS mount of the work space... Then you can just run it without having to copy it...