[Bug math/6793] logb() does not set errno on pole error

[wdijkstr at arm dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=6793

Wilco <wdijkstr at arm dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |wdijkstr at arm dot com

--- Comment #5 from Wilco <wdijkstr at arm dot com> ---
It's not clear what is best here - many functions (such as all the round,
roundeven, rint variations) do not set errno at all, so it appears ilogb/llogb
are the odd ones out. Several targets inline these functions as native
operations and thus will never set errno. GCC may decide not to inline some of
these with -fno-math-errno, but again, this is not consistent. Then GLIBC
decides to inline some anyway using -fno-math-errno.

In short, it's a total mess.

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