Assembly in C

Hi all can anyone tell me how to include assembly code in between your C coding. For the sake of simplicity consider the below code and mentioned procedure thereafter which I learn from the A51macro assembler and utility file.

void main()
{
 #pragma asm
  JMP $
 #pragma endasm
  while(1);
}

After this step I am right clicking on my source file main.c and in the Option for... properties I am activating Generate Assembler SRC file and Assemble SRC file. After this step on final rebuilding the target files I am getting list of 2 warnings-
1) UNRESOLVED EXTERNAL SYMBOL symbol C_START
2) REFERENCE MADE TO UNRESOLVED EXTERNAL symbol C_START

Please tell how to eliminate this and get 0 error and 0 warning. Thanks