Sender: mike AT Home-51 DOT inp DOT nsk DOT su
To: djgpp AT delorie DOT com
Subject: Re: Excessive exe sizes
References: <01bcf777$71921820$56f682c1 AT nicland>
	<6587ak$f53 AT examiner DOT concentric DOT net>
From: Michael Bukin <bukinm AT inp DOT nsk DOT su>
Date: 23 Nov 1997 13:54:10 +0600
In-Reply-To: "DigitalFX"'s message of Sat, 22 Nov 1997 22:18:20 -0500
Message-ID: <m3g1oof3kt.fsf@H-Bukin.inp.nsk.su>
Lines: 29
Precedence: bulk

"DigitalFX" <digifx AT concentric DOT net> writes:

> >When I compile my program it produces an excessive .exe - 2.7Mb from source
> >files of about 40Kb! The .o file is 2.6Mb. When I looked at the .exe and
> >the .o I found they were mostly blank space.
> 
> You can use STRIP and DJP to get the filesize down.

  Or use function with `constructor' attribute to generate array at
startup.  But this solution is gcc specific.

int* array;

void array_ctor (void) __attribute__ ((__constructor__));

void
array_ctor (void)
{
  array = (int*) malloc (100 * sizeof (int));
  /* Test returned pointer and initialize array here.  */
}

I'm sure that it is safe to call malloc or new in constructor, but the
only way to be sure is to look in gcc sources (or ask gcc developers).


Read about function attributes with:

info gcc "c ext" "function attr"