Does specifying the object file in 'OBJECT' have the desired effect ? 
OBJECT => 'module_name.$(OBJ_EXT) extra.$(OBJ_EXT)',

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Update: The 2 stops (.) are wrong and it's probably better expressed as: 
OBJECT => '$(BASEEXT)$(OBJ_EXT) extra$(OBJ_EXT)',

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I gather that if you specify one object file, then you need to specify *all* object files that are going to be built. (And I don't know whether that's all that's required to get it to work.)

Cheers,
Rob

In reply to Re: extra .c file in .xs module building by syphilis
in thread extra .c file in .xs module building by cmac

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