Re: _Very_ strange problem with compiling
I just compiled it with gcc 2.95 and it compiled
and ran fine..
very strange....
xucaen
--- Mark Phillips <mark@infoeng.flinders.edu.au>
wrote:
> Hi,
>
> I thought I'd found a gcc compiler error (and
> still may have). The
> following program crashes with a segmentation
> fault.
>
> #define N 209677
>
> int main(int argv, char **argc) {
> int
> i;
> double
> a[N],
> b[N],
> c[N],
> d[N],
> e[N];
>
> c[0]=0.0;
> i=1;
> c[i]=c[i-1];
> }
>
> If I make N slightly less, or reduce the number
> of arrays defined, it
> runs fine. If I write instead "c[1]=c[0]" it
> runs fine. Basically, I
> simplified the original program as much as I
> could in ways which still
> caused the Seg Fault to happen.
>
> So I thought this must be a compiler error.
> The program was called
> "thick4.c". I used emacs to paste the file
> into a new buffer called
> "test.c". But this one worked fine when I
> compiled!!!! The two files
> "thick4.c" and "test.c" are identical, as both
> diff and cmp prove.
>
> The executables "thick4" and "test" differ very
> slightly however.
>
> -rwxrwxr-x 1 mark mark 4731 Mar
> 7 02:53 test*
> -rw-rw-r-- 1 mark mark 162 Mar
> 7 02:53 test.c
> -rwxrwxr-x 1 mark mark 4733 Mar
> 7 02:53 thick4*
> -rw-r--r-- 1 mark mark 162 Mar
> 7 02:51 thick4.c
>
> and
>
> $ cmp thick4 test
> thick4 test differ: char 3061, line 2
>
> Why would identical files compile to slightly
> different executables?
> I have included gzipped versions of these
> executables with this email.
>
> Has anyone got any idea what might be going on?
> Or suggestions about
> what I could investigate next!
>
> Also, can anyone else replicate the error I got
> (using thick4.c as
> your file name).
>
> Thanks,
>
> Mark.
>
> --
>
_/~~~~~~~~\___/~~~~~~\____________________________________________________
>
____/~~\_____/~~\__/~~\__________________________Mark_Phillips____________
>
____/~~\_____/~~\________________________________mark@ist.flinders.edu.au_
>
____/~~\HE___/~~\__/~~\APTAIN_____________________________________________
>
____/~~\______/~~~~~~\____________________________________________________
>
__________________________________________________________________________
> "They told me I was gullible ... and I
> believed them!"
>
>
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