Peter Eisentraut <peter_e@gmx.net> writes:
> Am Donnerstag, 12. Januar 2006 09:57 schrieb Tom Lane:
>> In principle an aggressive compiler could still determine that the
>> global variable is modified nowhere else in the executable.
> I think to do that the compiler would have to prove what the dynamic linker
> will do at run time.
Yeah. The idea of casting a function pointer to (double *) seems mighty
ugly, and in the absence of evidence that we need it, I think it's
better to stick with less surprising code. I've committed changes to
make the tests look like this:
AC_TRY_LINK([
#include <math.h>
double glob_double;
],
[return finite(glob_double) ? 0 : 1;],
[AC_DEFINE(HAVE_FINITE, 1, [Define to 1 if you have finite().])
AC_MSG_RESULT(yes)],
[AC_MSG_RESULT(no)])
regards, tom lane
