[Info-vax] date comparison format from a program

[Stephen Hoffman]

On 2019-05-20 15:43:48 +0000, gérard Calliet said:

> "At the same time" means VMS 5.5-h4 . The demonstration I have to do 
> must be for  VAX/VMS and C which are a little bit old.

Are you intending to be hateful to your audience?

> (And no, impossible to do any migration, the deal is maintening 
> somewhere knowledge on a platform where not any change is possible; VMS 
> 5.5-h4 has to be there for 10 years at least from now)

Quarter-century old software is very old software.  Very insecure 
software, increasingly difficult to interoperate with, and very 
difficult to securely connect to, too.

As for the C compilers?  VAX C is at least as far back from DEC C as 
DEC C is far back from the current C18, in terms of features and syntax 
and capabilities and tooling.  If not further.  DEC C was available on 
V5.5-2H4, in conjunction with the AACRT060 patch.  VAX C is K&R and 
pre-ANSI C, and it's known to have some nasty bugs.  Not the least of 
which involves MD5.  Avoid VAX C.


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