Lpc2000

I am quite new to LPC2000. When I was trying to building up a 
program, I encountered some problems. Would you please do me a 
favour, thank you very much!
The problem is some errors occurred when I made the Makefile. The 
errors are as follows.
$ make
arm-linux-gcc -arm-32-msoft-float-mno-fpu -c -o startup.o startup.S
startup.S: Assembler messages:
startup.S:69: Error: internal_relocation (type: OFFSET_IMM) not 
fixed up
startup.S:72: Error: internal_relocation (type: OFFSET_IMM) not 
fixed up
startup.S:75: Error: internal_relocation (type: OFFSET_IMM) not 
fixed up
startup.S:78: Error: internal_relocation (type: OFFSET_IMM) not 
fixed up
startup.S:81: Error: internal_relocation (type: OFFSET_IMM) not 
fixed up
startup.S:84: Error: internal_relocation (type: OFFSET_IMM) not 
fixed up
startup.S:119: Error: internal_relocation (type: OFFSET_IMM) not 
fixed up
startup.S:120: Error: internal_relocation (type: OFFSET_IMM) not 
fixed up
startup.S:128: Error: internal_relocation (type: OFFSET_IMM) not 
fixed up
startup.S:129: Error: internal_relocation (type: OFFSET_IMM) not 
fixed up
make: *** [startup.o] Error 1

And codes where errors occurred are as follows.
StackInit:
	mov	r0, lr
/* build the SVC stack */
	msr	cpsr_c, #0xd3
	ldr	sp, _svc_stack
/* build the IRQ stack */
	msr	cpsr_c, #0xd2
	ldr	sp, _irp_stack
/* build the FIQ stack */
	msr	cpsr_c, #0xd1
	ldr	sp, _fiq_stack
/* build the ABT stack */
	msr	cpsr_c, #0xd7
	ldr	sp, _abort_stack
/* build the UND stack */
	msr	cpsr_c, #0xdb
	ldr	sp, _undefined_stack
/* build the SYS stack */
	msr	cpsr_c, #0xdf
	ldr	sp, _usr_stack
/* return back */
	mov 	pc, r0

I did defined the variables: _svc_stack, _irq_stack, ..., in the 
link file and allocated them to a specific address by using such an 
expression: _svc_stack=.; ,what's wrong? Help! Thanks again for your 
attention.

Best regards,

Kevin