The following libstdc++ patch
[v3] Handle C++11 <math.h> overloads on Solaris 12
https://gcc.gnu.org/ml/gcc-patches/2015-11/msg02075.html
has remained unreviewed for a week. It fixes a Solaris 12 bootstrap
failure and is especially important for the gcc-5 branch at this point.
With the GCC 5.3 release imminent, it would be a pity to release without
this patch, S12 bootstrap broken and all the effort that went into
supporting S12 wasted.
Thanks.
Rainer
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Rainer Orth, Center for Biotechnology, Bielefeld University