[Bug libstdc++/39491] [4.2/4.3 regression] symbol __signbitl@GLIBCXX_3.4 in libstdc++ exported
------- Comment #32 from carlos at codesourcery dot com 2009-04-29 15:07 -------
No, you are absolutely right and the tree dumps confirm it. I thought it might
be possible to trigger a reference by using the right flags, but to no avail,
the compiler always folds the if-then-else to __signbit.
This proves to me that no program could have ever created a reference to
__signbitl unless they specifically called __signbitl, which is a but in the
application.
I now agree with Benjamin that this is a [4.2/4.3 regression].
Notes:
* I am using -fno-builtins to avoid the compiler builtins from being used for
signbit[fl].
* I would never want libstdc++ to ever provide a default symbol for __signbitl,
only a compat one, but this is now moot since we proved no program could ever
reference __signbitl.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39491
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