https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60637
--- Comment #11 from Jonathan Wakely ---
Author: redi
Date: Mon Jan 18 17:15:42 2016
New Revision: 232534
URL: https://gcc.gnu.org/viewcvs?rev=232534=gcc=rev
Log:
Add test for PR 60637
PR libstdc++/60637
*
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60637
--- Comment #9 from Jonathan Wakely ---
Author: redi
Date: Mon Jan 18 16:28:48 2016
New Revision: 232532
URL: https://gcc.gnu.org/viewcvs?rev=232532=gcc=rev
Log:
Fix C++98 std::signbit
PR libstdc++/60637
*
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60637
--- Comment #8 from Jonathan Wakely ---
Author: redi
Date: Mon Jan 18 16:28:16 2016
New Revision: 232531
URL: https://gcc.gnu.org/viewcvs?rev=232531=gcc=rev
Log:
Fix C++98 std::signbit
PR libstdc++/60637
*
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60637
Jonathan Wakely changed:
What|Removed |Added
Status|ASSIGNED|RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60637
Jonathan Wakely changed:
What|Removed |Added
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60637
--- Comment #4 from Jonathan Wakely ---
I think we can fix the C++98 std::signbit(_Tp) with:
typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
return sizeof(__type) == sizeof(long double)
?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60637
--- Comment #5 from Marc Glisse ---
(In reply to Jonathan Wakely from comment #4)
> I think we can fix the C++98 std::signbit(_Tp) with:
>
> typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
> return sizeof(__type) ==
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60637
--- Comment #7 from Jonathan Wakely ---
To be clear, I'm not opposed to reusing the C++11 code for the non-standard
C++98 functions (all of them, not just signbit). That seems like a reasonable
project to undertake in stage 1, if someone is
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60637
--- Comment #6 from Jonathan Wakely ---
(In reply to Marc Glisse from comment #5)
> Why do you want to use a different code for C++98 and C++11? The best
> solution would be to remove the declaration in C++98, since it is not
> standard, but if
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60637
--- Comment #3 from Jonathan Wakely ---
Thanks to PR 36757 __builtin_signbit is now generic, so this is fixed on trunk.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60637
Jonathan Wakely changed:
What|Removed |Added
Known to work||6.0
Severity|major
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60637
--- Comment #1 from Daniel Krügler daniel.kruegler at googlemail dot com ---
This seems to be fixed in 4.9.0 trunk. My guess is that this was solved via bug
58625.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60637
--- Comment #2 from Marc Glisse glisse at gcc dot gnu.org ---
IIUC (with gcc-4.9), signbit is not part of C++98, and with -std=c++11 things
work. In C++98 mode, libstdc++ (sometimes) provides std::signbit as an
extension, which calls
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