From: firewind <firewind AT metroid DOT dyn DOT ml DOT org>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Large arrays eating disk space
Date: 12 Oct 1997 18:16:09 GMT
Organization: Netcom
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J. Hormuzdiar <jimh AT pantheon DOT yale DOT edu> wrote:

> Hello-
> 	Perhaps this question is better intended for comp.lang.c, but I am
> not sure yet.

It is not on-topic for comp.lang.c; how a compiler stores fixed-length
arrays has nothing to do with the C language.

> 	I am using a djgpp/rhide environment with a program that has some
> huge fixed size arrays.  When I compile I get an executable that is
> correspondingly huge (many meg's), even though the code is pretty small.
> I assume that the compiler is saving the whole huge blank pre-used array
> in the executable, and I wish it wouldn't.  The space is a problem, but
> even worse is the wait for the compiler to save the huge thing every time.

> 	I could just dynamically allocate using malloc, but I seem to
> remember that there is a keyword or option that will automatically do it
> for me.  Perhaps I could just add a word to the declaration-

> (word) float x[7000][7000];

If you are using C++ and are delcaring the array 'static,' adding the switch
'-fconserve-space' can help out, as described in the DJGPP FAQ, section 8.14.
Otherwise, I see no solution save dynamic allocation.

late\fw

-- 
[- 				 firewind	                            -]
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