From: Eric Backus <ericb AT lsid DOT hp DOT com>
Subject: Re: A little correction for DGJCC222
To: cignoni AT suncube DOT CNUCE DOT CNR DOT IT
Date: Mon, 14 Dec 92 9:43:09 PST
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Mailer: Elm [revision: 66.25]

> Dear Mr. DJ
> I just installed DGJCC222 and gave it a look. It's a very well done job.
> I found only a little (by now!) "bug" in the file limits.h.
> The old-styled constant CLK_TCK is improperly defined.
> It should have the same value as CLOCKS_PER_SEC (ANSI standard)
> found in time.h

I don't believe this is true.  CLK_TCK specifies the number of clock
ticks per second of the system clock.  CLOCKS_PER_SEC specifies the
number that you must divide the output of the clock() function to get
seconds.  They are not usually equal.  The clock() function typically
returns a number of microseconds (making CLOCKS_PER_SEC equal to
1000000).  However, the system clock is typically much coarser than
that, which just means that the output of the clock() function will
change in big jumps.

I think the current values of these constants are correct (except
perhaps CLK_TCK should probably be some strange number like 182? to
match the DOS timer interrupt?)

> I'd like to thank you for your job: djgcc is the only useful C-compiler under
> MS-DOG!

I couldn't agree more.

> Vincenzo "Enzo" Romano
> Dept. of Computer Science            ____.-.____  ... to boldly go where no
> Univ. of Pisa  ITALY          ====   `--.___,--'      Man has gone before!
>                                  `\______/'
>                                    `-----'
--
				Eric Backus
				ericb AT lsid DOT hp DOT com
				(206) 335-2495