Re: Egcs 1.0.3 & Linux

David Todd (
Tue, 19 May 1998 12:04:28 -0400

I asked a very smart friend of mine about this, and he whipped out the ANSI

It turns out that since addition is an associative operation, the compiler is
free to reorder the terms for optimization.

Further, he pointed out that you would still have a problem is you had
something like:

#include <stdio.h>
int a=0;
int f(void) { a=1;return 1; }
int g(void) { a=2;return 1; }
void main(void) { printf("%d",a+f()+g()); }

And in my mind f + g should be computed so that they are constants before
performing the addition.

In any case the point here is DON'T USE GLOBALS!

Even errno is a bad idea. (Need a solution for that one.)

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