Test cross compiler with sample code.

getTime.c
#include <stdio.h>
#include <time.h>
#include <string.h>

int main() {
    time_t t;
    char *strTime;

    time(&t);

    strTime = ctime(&t);

    printf("%s\n", strTime);
   
    return 0;
}  

compile on x86
root@jcjung:~/work# gcc getTime.c -o getTime_x86
root@jcjung:~/work# ./getTime_x86
Tue Jan 17 13:53:32 2012

compile on arm
root@jcjung:~/work# arm-none-linux-gnueabi-gcc getTime.c -o getTime_arm
root@jcjung:~/work# ./getTime_arm
bash: ./getTime_arm: 바이너리 파일을 실행할 수 없음

Information of executable files
root@jcjung:~/work# ./getTime_arm
bash: ./getTime_arm: 바이너리 파일을 실행할 수 없음
root@jcjung:~/work# file getTime_x86
getTime_x86: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.15, not stripped
root@jcjung:~/work# file getTime_arm
getTime_arm: ELF 32-bit LSB executable, ARM, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.16, not stripped

move to tftp shared directory
root@jcjung:~/work# cp getTime_arm /var/lib/tftpboot/


Move to target board

set target board network
bash-3.2# ifconfig eth0 192.168.10.100 up
eth0: link down
bash-3.2# ieth0: link up, 100Mbps, full-duplex, lpa 0xCDE1
 
bash-3.2# ifconfig
eth0      Link encap:Ethernet  HWaddr 02:10:02:01:C0:01 
          inet addr:192.168.10.100  Bcast:192.168.10.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:22 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:2768 (2.7 KiB)  TX bytes:0 (0.0 B)
          Interrupt:185 Base address:0xc000


cd /data/linux
bash-3.2# tftp -g 192.168.10.10 -r getTime_arm
bash-3.2# ls -lh
-rw-rw-rw-    1 0        0            5.6k Jan  1 00:25 getTime_arm

bash-3.2# chmod 755 getTime_arm
bash-3.2# ls -lh               
-rwxr-xr-x    1 0        0            5.6k Jan  1 00:25 getTime_arm

bash-3.2# ./getTime_arm
bash: ./getTime_arm: No such file or directory

This problem is caused by dynamic linking to find glibc, so we have to change to use static linking

root@jcjung:~/work# arm-none-linux-gnueabi-gcc -static getTime.c -o getTime_arm_static
root@jcjung:~/work# file getTime_arm_static
getTime_arm_static: ELF 32-bit LSB executable, ARM, version 1 (SYSV), statically linked, for GNU/Linux 2.6.16, not stripped
root@jcjung:~/work# ls -lh getTime*
-rw-r--r-- 1 root root  198 2012-01-17 13:53 getTime.c
-rwxr-xr-x 1 root root 5.7K 2012-01-17 13:54 getTime_arm
-rwxr-xr-x 1 root root 635K 2012-01-17 14:29 getTime_arm_static
-rwxr-xr-x 1 root root 7.1K 2012-01-17 13:53 getTime_x86

root@jcjung:~/work# cp getTime_arm_static /var/lib/tftpboot/

bash-3.2# tftp -g 192.168.10.10 -r getTime_arm_static
bash-3.2# chmod 755 getTime_arm_static              
bash-3.2# ./getTime_arm_static                      
Sat Jan  1 00:55:25 2000