CC = arm-linux-gcc    
LD = arm-linux-ld
OBJDUMP = arm-linux-objdump
OBJCOPY = arm-linux-objcopy 
LDFAGS := -T myld.lds
LDFAGS += -lc -lm -lgcc_s -Bstatic     
CFLAGS := -g -c -O2 -nostdlib
CFLAGS += -o
objs=main.o app.o
ucos_ii.bin:$(objs)
    $(LD) -o core.elf  $(objs) $(LDFAGS) -Map core.map 
    $(OBJCOPY) -O binary -S core.elf core.bin
    $(OBJDUMP) -D -m arm core.elf > core.dis
main.o:main.c
    $(CC) $(CFLAGS) $@ $<
app.o:app.c
    $(CC) $(CFLAGS) $@ $<
clean:
    -rm -f *.o
    -rm -f *.elf 
    -rm -f *.bin
    -rm -f *.map

ENTRY(_start)
SECTIONS
{
. = 0x20000040;
     .text :    
      { 
    *(.text )
      }
      . = ALIGN(4);
    .rodata : { *(.rodata) }
    . = ALIGN(4);
    .data : { *(.data) }
    . = ALIGN(4);
    .bss : { *(.bss) }
}

#include "app.h"
int main(void)
{
    app();
    return 0;
}

static void *memcpy(void *dest, void *src, int count)
{
    char *tmp = dest;
    char *s = src;
    while (count--)
        *tmp++ = *s++;
    return dest;
}
int app(void)
{
    char a[4];
    char str="1234";
    memcpy(a,str,4);
    return 0;    
}

int app(void);

#include <string.h>
int app(void)
{
    char a[4];
    char str="1234";
    memcpy(a,str,4);
    return 0;    
}