* ALIGNMENT/ please reply!!!
@ 1999-12-19 6:22 cris
1999-12-31 22:24 ` cris
2000-01-07 6:10 ` Herve Dutter
0 siblings, 2 replies; 4+ messages in thread
From: cris @ 1999-12-19 6:22 UTC (permalink / raw)
To: help-gcc
Guys, i really need help!
i'm reposting my first msg:
hi!
how can i tell gcc to compile my programs using strict-alignment for data
types?
if i write smth like this:
void *full_array = malloc(50);
short *short_p = &(( (char*) full_array)[ N ]);
printf("%hd\n",*short_p);
if N is odd, i get a core dump!
i'm using gcc 2.7.2 on an old sparc2 with SunOs 4.1.3, no way to upgrade the
os or to get a newer build of gcc.
i've searched in the doc., i've found -m switches regarding alignment for
ibm machines, but none for sparc ones!
i've also seen a SHORT_ALIGNMENT macro to be defined (gcc-info, "You can
control compilation driver"), but i don't know WHERE to define it!
please help, reply by email too!
have a nice day :)
^ permalink raw reply [flat|nested] 4+ messages in thread
* ALIGNMENT/ please reply!!!
1999-12-19 6:22 ALIGNMENT/ please reply!!! cris
@ 1999-12-31 22:24 ` cris
2000-01-07 6:10 ` Herve Dutter
1 sibling, 0 replies; 4+ messages in thread
From: cris @ 1999-12-31 22:24 UTC (permalink / raw)
To: help-gcc
Guys, i really need help!
i'm reposting my first msg:
hi!
how can i tell gcc to compile my programs using strict-alignment for data
types?
if i write smth like this:
void *full_array = malloc(50);
short *short_p = &(( (char*) full_array)[ N ]);
printf("%hd\n",*short_p);
if N is odd, i get a core dump!
i'm using gcc 2.7.2 on an old sparc2 with SunOs 4.1.3, no way to upgrade the
os or to get a newer build of gcc.
i've searched in the doc., i've found -m switches regarding alignment for
ibm machines, but none for sparc ones!
i've also seen a SHORT_ALIGNMENT macro to be defined (gcc-info, "You can
control compilation driver"), but i don't know WHERE to define it!
please help, reply by email too!
have a nice day :)
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: ALIGNMENT/ please reply!!!
1999-12-19 6:22 ALIGNMENT/ please reply!!! cris
1999-12-31 22:24 ` cris
@ 2000-01-07 6:10 ` Herve Dutter
2000-04-01 0:00 ` Herve Dutter
1 sibling, 1 reply; 4+ messages in thread
From: Herve Dutter @ 2000-01-07 6:10 UTC (permalink / raw)
To: help-gcc
hi!
I can see no alignment issue in what you describe, the SPARC processor
is just not able to handle shorts with odd location.
Cheers.
cris wrote:
>
> Guys, i really need help!
>
> i'm reposting my first msg:
>
> hi!
>
> how can i tell gcc to compile my programs using strict-alignment for data
> types?
> if i write smth like this:
>
> void *full_array = malloc(50);
> short *short_p = &(( (char*) full_array)[ N ]);
>
> printf("%hd\n",*short_p);
>
> if N is odd, i get a core dump!
>
> i'm using gcc 2.7.2 on an old sparc2 with SunOs 4.1.3, no way to upgrade the
> os or to get a newer build of gcc.
>
> i've searched in the doc., i've found -m switches regarding alignment for
> ibm machines, but none for sparc ones!
>
> i've also seen a SHORT_ALIGNMENT macro to be defined (gcc-info, "You can
> control compilation driver"), but i don't know WHERE to define it!
>
> please help, reply by email too!
>
> have a nice day :)
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: ALIGNMENT/ please reply!!!
2000-01-07 6:10 ` Herve Dutter
@ 2000-04-01 0:00 ` Herve Dutter
0 siblings, 0 replies; 4+ messages in thread
From: Herve Dutter @ 2000-04-01 0:00 UTC (permalink / raw)
To: help-gcc
hi!
I can see no alignment issue in what you describe, the SPARC processor
is just not able to handle shorts with odd location.
Cheers.
cris wrote:
>
> Guys, i really need help!
>
> i'm reposting my first msg:
>
> hi!
>
> how can i tell gcc to compile my programs using strict-alignment for data
> types?
> if i write smth like this:
>
> void *full_array = malloc(50);
> short *short_p = &(( (char*) full_array)[ N ]);
>
> printf("%hd\n",*short_p);
>
> if N is odd, i get a core dump!
>
> i'm using gcc 2.7.2 on an old sparc2 with SunOs 4.1.3, no way to upgrade the
> os or to get a newer build of gcc.
>
> i've searched in the doc., i've found -m switches regarding alignment for
> ibm machines, but none for sparc ones!
>
> i've also seen a SHORT_ALIGNMENT macro to be defined (gcc-info, "You can
> control compilation driver"), but i don't know WHERE to define it!
>
> please help, reply by email too!
>
> have a nice day :)
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2000-04-01 0:00 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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1999-12-19 6:22 ALIGNMENT/ please reply!!! cris
1999-12-31 22:24 ` cris
2000-01-07 6:10 ` Herve Dutter
2000-04-01 0:00 ` Herve Dutter
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