sama5d3 xplained 开发板运行主机编写的HelloWorld

#include <stdio.h>

int main() {
    printf("hello, world!");

    return 0;
}

$ arm-none-linux-gnueabi-gcc hello.c -o hello -static

root@sama5d3_xplained:~/test# tftp -g -l hello 192.168.1.25
root@sama5d3_xplained:~/test# chmod 777 hello
root@sama5d3_xplained:~/test# ./hello                               

$ /opt/arm-cross/arm-2011.03/bin/arm-none-eabi-gcc hello.c -o hello

/opt/arm-cross/arm-2011.03/bin/../lib/gcc/arm-none-eabi/4.5.2/../../../../arm-none-eabi/bin/ld: warning: cannot find entry symbol _start; defaulting to 00008018
/opt/arm-cross/arm-2011.03/bin/../lib/gcc/arm-none-eabi/4.5.2/../../../../arm-none-eabi/lib/libc.a(lib_a-sbrkr.o): In function `_sbrk_r‘:
sbrkr.c:(.text+0x18): undefined reference to `_sbrk‘
/opt/arm-cross/arm-2011.03/bin/../lib/gcc/arm-none-eabi/4.5.2/../../../../arm-none-eabi/lib/libc.a(lib_a-writer.o): In function `_write_r‘:
writer.c:(.text+0x20): undefined reference to `_write‘
/opt/arm-cross/arm-2011.03/bin/../lib/gcc/arm-none-eabi/4.5.2/../../../../arm-none-eabi/lib/libc.a(lib_a-closer.o): In function `_close_r‘:
closer.c:(.text+0x18): undefined reference to `_close‘
/opt/arm-cross/arm-2011.03/bin/../lib/gcc/arm-none-eabi/4.5.2/../../../../arm-none-eabi/lib/libc.a(lib_a-fstatr.o): In function `_fstat_r‘:
fstatr.c:(.text+0x1c): undefined reference to `_fstat‘
/opt/arm-cross/arm-2011.03/bin/../lib/gcc/arm-none-eabi/4.5.2/../../../../arm-none-eabi/lib/libc.a(lib_a-isattyr.o): In function `_isatty_r‘:
isattyr.c:(.text+0x18): undefined reference to `_isatty‘
/opt/arm-cross/arm-2011.03/bin/../lib/gcc/arm-none-eabi/4.5.2/../../../../arm-none-eabi/lib/libc.a(lib_a-lseekr.o): In function `_lseek_r‘:
lseekr.c:(.text+0x20): undefined reference to `_lseek‘
/opt/arm-cross/arm-2011.03/bin/../lib/gcc/arm-none-eabi/4.5.2/../../../../arm-none-eabi/lib/libc.a(lib_a-readr.o): In function `_read_r‘:
readr.c:(.text+0x20): undefined reference to `_read‘
collect2: ld returned 1 exit status