On Sat, Oct 14, 2023 at 01:49:34PM +0100, Richard W.M. Jones wrote: > https://aur.archlinux.org/packages/nbdkit#comment-938282
> FAIL: test-public > ================= > > Wrong return value for inf, got 0, expected -1 > Wrong result for inf, got inf, expected 0 > Wrong return value for nan, got 0, expected -1 > Wrong return value for nan/inf, got 0, expected -1 > Wrong return value for inf/inf, got 0, expected -1 > Wrong return value for nan/nan, got 0, expected -1 > Wrong return value for -0, got 0, expected -1 > Wrong return value for 1e200/1e-200, got 0, expected -1 > Wrong result for 1e200/1e-200, got inf, expected 0 > FAIL test-public (exit status: 1) This turned out to be caused by using -Ofast or -ffast-math, and more specifically the -ffinite-math-only option. This option allows the compiler to assume that all floating point operations have finite, non-NaN parameters, thus functions like isfinite(3) in the standard library are simply expected not to work. As I said on the bug report the workaround is to use -fno-finite-math-only, but better would be not to use the options -Ofast/-ffast-math in the first place. I don't think this is something we need to fix upstream, since by using those options you're breaking the compiler, so in my view as the user you get to keep the pieces. Also there's not a reliable way to even detect this. Using -ffast-math defines "__FAST_MATH__", but apparently nothing is defined for the specific option -ffinite-math-only. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://people.redhat.com/~rjones/virt-top _______________________________________________ Libguestfs mailing list Libguestfs@redhat.com https://listman.redhat.com/mailman/listinfo/libguestfs
