[issue3168] cmath test fails on Solaris 10
Mark Dickinson
report at bugs.python.org
Sat Jul 5 22:10:34 CEST 2008
Mark Dickinson <dickinsm at gmail.com> added the comment:
> There is another, perhaps related issue on Solaris. The compiler warns
> that function finite is implicitly defined.
>
> Commenting out this line in pyconfig.h as
>
> /* #define HAVE_FINITE 1 */
>
> make that warning go away. If there is no function finite, why is
> HAVE_FINITE defined at all?
I don't think this is too serious. My guess would be that both finite and
isfinite (which is the C99-recommended way to spell finite) are
implemented in libm, but that only isfinite is mentioned in math.h (or
possibly that finite is mentioned is math.h but is ifdef'd out as a result
of some particular compiler options).
So a code snippet that refers to 'finite' emits a warning, but compiles
fine. Hence the corresponding autoconf test passes, and autoconf sets
HAVE_FINITE to 1. And the Python build also emits a warning, but compiles
and runs fine.
Could you take a look in the 'config.log' file after configuring and see
whether the 'implicit definition of finite' warning is in there as well?
The right fix is probably to rework things to use 'isfinite' in preference
to 'finite'. I'm not sure that Windows has isfinite, though.
----------
status: open -> closed
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