Can C51 compiler generate .elf file?

I was trying to generate .elf file using C51 compiler. From my quick search in Keil official website, apparently C51 compiler could not generate .elf format, I might be wrong. So, I would like to understand the following items:

  1. Does C51 support .elf generation?
  2. If yes, how could I generate it? I would prefer command line. 
  3. Is there any setting needed in order to generate .elf using C51?
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