http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43622
Paul A. Bristow <pbristow at hetp dot u-net.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |pbristow at hetp dot u-net.com --- Comment #12 from Paul A. Bristow <pbristow at hetp dot u-net.com> --- This still exists at 4.8.2 and is a *showstopper* for running the Boost.Math library at all the available precisions, up to 128-bit precision where available. typeid(type).name() fails with: undefined reference to `typeinfo for __float128' We can check that the library seems to work OK by ugly hacking of error handling and a few examples of test code (out of the hundreds of tests), but we absolutely need this before it can be fully tested at 128-bit precision and released. Getting this library to pass is part of a demonstration of the proposed C++ and C library additions by Christopher Kormanyos and John Maddock Floating-Point Typedefs Having Specified Widths - N3626 http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3626.pdf http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1703.pdf Everything is working to provide full C++ 128-bit floating-point - apart from this :-( So we are very keen to have a fix.