On Wed, Jul 16, 2008 at 03:47:41PM +0200, Michael Kerrisk wrote:
> There are two signaling mechanism:
mechanisms
> If
> .B_SVID_SOURCE
> is defined, glibc provides the older
> .I matherr ()
> error-reporting framework defined by SVID.
Typo: .B _SVID_SOURCE
But defining this does not suffice, one also needs the magic incantation
_LIB_VERSION = _SVID_;
Example:
/* matherr demo; link with -lm */
#define _SVID_SOURCE
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
int matherr(struct exception *x) {
fprintf(stderr, "math error\n");
exit(1);
}
int main(){
double x;
_LIB_VERSION = _SVID_;
x = sqrt(-1.0);
printf("x=%f\n", x);
return 0;
}
Andries
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