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[Bug libstdc++/39491] [4.4/4.5 regression] symbol __signbitl@GLIBCXX_3.4 in libstdc++ not exported anymore
- From: "dave at hiauly1 dot hia dot nrc dot ca" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 22 Apr 2009 19:32:33 -0000
- Subject: [Bug libstdc++/39491] [4.4/4.5 regression] symbol __signbitl@GLIBCXX_3.4 in libstdc++ not exported anymore
- References: <bug-39491-11764@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #17 from dave at hiauly1 dot hia dot nrc dot ca 2009-04-22 19:32 -------
Subject: Re: [4.4/4.5 regression] symbol __signbitl@GLIBCXX_3.4 in libstdc++
not exported anymore
> * Original submitter is incorrect, there has never been a
> __signbitl@GLIBCXX_3.4 symbol, and there should not be one now?
The symbol is present in libstdc++.so.6.0.9 and libstdc++.so.6.0.10,
but not in libstdc++.so.6.0.8 or libstdc++.so.6.0.11.
> * I have changed the glibc hppa-linux-gnu port to define __NO_LONG_DOUBLE_MATH,
> and therefore the signbit macro, even in the abscense of optimization, will
> always return a valid signbit function based on the type size.
I'm not convinced this is a good idea at this point. As far as I know,
it is ok to have the same size for double and long double. However,
they are distinct types.
Dave
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39491