This is output from `defines' version 4.1.1, from your buddies at Newtware!
Thu Apr  5 08:59:23 CDT 2012
amnesia amnesia 4.0 4.0 i386 i386
cc = [cc]

__DATE__	=  "Apr  5 2012" 
__FILE__	=  "/tmp/def248.c" 
__LINE__	=  2045 
__STDC__	=  0 
__TIME__	=  "08:59:24" 
i386	=  1 
unix	=  1 

Checking other possibilities; should already be listed above:
__DATE__	= "Apr  5 2012"
__FILE__	= "/tmp/def248.c"
__LINE__	= 25
__STDC__	= 0
__TIME__	= "08:59:24"

Sizes of basic variable types:
  sizeof(char)           = 8 bits
  sizeof(short)          = 16 bits
  sizeof(int)            = 32 bits
  sizeof(long)           = 32 bits
  sizeof(float)          = 32 bits
  sizeof(double)         = 64 bits
  sizeof(long double)    = 96 bits
  sizeof(char *)         = 32 bits
  sizeof(char (*)(char)) = 32 bits