__gccmain error

["dscho" <dscho@xxxxxxxxxxxxxxxxxx>]

Hello,
 
I've built arm-elf-XXX tools and used to build a test file. 
There the
message "test.o(.text+0x10): undefined reference to 
`__gccmain'" is printed.
Pls. let me know how to overcome this and generate the executable?

not works a case:
arm-elf-gcc -S convolution.c 
arm-elf-as -o convolution.o convolution.s
arm-elf-ld -o convolution.axf convolution.o
error message printed : undefined reference to '__gccmain'

works a case:
arm-elf-gcc -o convolution.o convolution.c 
arm-elf-ld -o convolution.axf convolution.o

works a case:
arm-elf-gcc -Wall -g -o convolution.axf convolution.c 

Thanks in advance.

--Jason C.