This is output from `defines' version 4.1.1, from your buddies at Newtware!
Sat Apr 28 12:25:23 2012 HKT
coh4210 coh4210 4.2.10ap COHERENT i386 
cc = [gcc]

Usage: strings [-dopx] [-nnn] [file ...]
/tmp/def222.c:
Usage: strings [-dopx] [-nnn] [file ...]
COHERENT	= 1 
_I386	= 1 
_IEEE	= 1 
__BASE_FILE__	= "/tmp/def222.c"
__COHERENT__	= 1 
__DATE__	= "Apr 28 2012"
__FILE__	= "/tmp/def222.c"
__GNUC_MINOR__	= 5 
__GNUC__	= 2 
__INCLUDE_LEVEL__	= 0
__LINE__	= 5759
__PTRDIFF_TYPE__	= int
__REGISTER_PREFIX__	= 
__SIZE_TYPE__	= unsigned int
__STDC__	= 1
__TIME__	= "12:25:33"
__USER_LABEL_PREFIX__	= 
__VERSION__	= "2.5.6"
__WCHAR_TYPE__	= long int

Checking other possibilities; should already be listed above:
__COHERENT__	= 0x0420 (when stdio.h #included)
__DATE__	= "Apr 28 2012"
__FILE__	= "/tmp/def222.c"
__GNUC__	= 2
__LINE__	= 25
__STDC__	= 1
__TIME__	= "12:25:33"

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