------- Comment #12 from dave at hiauly1 dot hia dot nrc dot ca 2009-04-21 21:01 ------- Subject: Re: [4.4/4.5 regression] symbol __signb...@glibcxx_3.4 in libstdc++ not exported anymore
> At present glibc does not create an long double alias for the double __signbit > function, but for the sake of correctness it probably should. In my build of gcc 4.3.3 and also debian 4.3.2-1.1 (lenny), I see the symbol __signbitl in libstdc++.so.6.0.10. We also have __signbitl@@GLIBCXX_3.4. In libstdc++.a, I see: signbitl.o: 00000000 T __signbitl In 4.3, we had the function signbitl.c in libmath. This was removed in 4.4. Looking at the 4.3 implementation, I see that it assumes a 96-bit long double format. This is wrong for hppa-linux, but I think the signbit extraction works because of the alignment of the long double value in the union. Dave -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39491
