Re: help regarding ld

[Nick Clifton <nickc at redhat dot com>]

Hi Aram,

>    i am using the arm-elf-gcc compiler to generate the assembly code
>
> arm-elf-gcc -mthumb -S new.c
>
> after this i use the arm-elf-as for genrating machine code
>
> arm-elf-as new.s

Note - these two steps could be combined into one by using the -c switch 
instead of the -S switch:

  arm-elf-gcc -mthumb -c new.c

> it produces one a.out file..     

Note: Despite its name this "a.out" file is not an executable program it 
is just an object file that still needs to be linked.  Naming the file 
a.out is a "feature" of the assembler.

> arm-elf-ld a.out
>
> produces error like 
>
> arm-elf-ld: warning: cannot find entry symbol _start; not setting start address
>
> how do i type the correct command line option for this 

Try using gcc to control the entire process from compilation to final 
link, like this:

  arm-elf-gcc new.c

Cheers
  Nick