On Jul 13, 2005, at 4:29 PM, Joe Buck wrote:
On Thu, Jul 14, 2005 at 08:16:07AM +0900, Hiroshi Fujishima wrote:
Eric Botcazou <[EMAIL PROTECTED]> writes:
The configure script which is included in rrdtool[1] checks whether
the system has isinf() as below.
#include <math.h>
int
main ()
{
float f = 0.0; isinf(f)
;
return 0;
}
The test is clearly fragile. Assigning the return value of isinf to
a
variable should be sufficient for 4.0.x at -O0.
Yes, I contact rrdtool maintainer. Thank you.
Best to make it a global variable, to guard against dead code
elimination.
Volatile would be even better. It's valid to eliminate stores into
globals
if you can determine the value isn't used thereafter, which we can here,
at least theoretically.
