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Re: binary backwards compatibility



On Mon, 2007-08-20 at 16:30 +0100, Pádraig Brady wrote:
> I was trying to compile a binary on Fedora 7
> so that is was portable to as many systems as possible,
> but was getting a "Floating point exception" at startup,
> on older systems?


your subject: is misguided; this isn't BACKWARDS compatibility;
backwards compatibility is "older software runs on new releases".. what
you want is the other way around.

> 
> I.E. compile the following on Fedora 7:
> 
> #include <stdio.h>
> int main(void)
> {
>     printf ("Hello world\n");
>     return 0;
> }
> 
> The resultant binary will throw a floating point exception
> at startup on ubuntu breezy and debian sarge at least
> (but is Ok on ubuntu feisty).


you need an LD option 
 --hash-style=sysv




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