Re: Sizes of executables from (UNIX) VMS compilers

[tdhammer@wsuiar.uucp]

In article <1700@enea.se>, sommar@enea.se (Erland Sommarskog) writes:
> Michael Feldman (mfeldman@seas.gwu.edu) gives the sizes of some
> "hello world" programs:
>>C   (HP835)     34816
>>Ada (HP835)     86016
>>
>>C   (Sun-3)     32768
>>Ada1(Sun-3)     57344
>>Ada2(Sun-3)    106496
>>Ada3(Sun-3)    139264
> 
> I don't think this is a language issue, but one of operating system.
> Shared libraries is apparently not a standard features on Unix, it
> has been on VMS as long as I have known. I haven't tried a "Hello
> world" on VMS, but it should be less than 10 blocks (= 5120 bytes).
> -- 
> Erland Sommarskog - ENEA Data, Stockholm - sommar@enea.se


Just did a quick compile of Feldman's 4 programs under VAX/VMS Ver 5.2.
Here are the results:

		  Hello, World		   Null Program

C  		    128 blocks		    122 blocks
Ada		      6 blocks		      5 blocks

Very interesting!  (A block is 512 bytes.)  Apparently the sharable
libraries under VMS do make a big difference.  Why the big numbers
with the C code?

I also compiled the hello, world program in Ada using the "bad" :-;
USE-clause.  The executable was also 6 blocks, however, I believe that
VMS only makes allocation in 3-block groups, therefore, there could be
a almost 1536 bytes difference between the two versions.

		Tim .D.
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