[petsc-dev] quad precision

[Jed Brown]

> GCC now ships with the LGPL-licensed libquadmath library, which provides
for targets with a __float128 datatype quad-precision mathematical
functions. __float128 is available for targets on 32-bit x86, x86-64 and
Itanium architectures. The libquadmath library is automatically built on
such targets when building the Fortran compiler.

http://gcc.gnu.org/gcc-4.6/changes.html#libquadmath
http://gcc.gnu.org/onlinedocs/libquadmath/

Looks like this is something that actually works. GCC-4.6 is probably about
two months away from a release, but this should be functional now. Perhaps
it should be supported by petsc-3.2?
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