This might be more than just a lark for me too. It looks like long
double solver support has moved from "requires a tricky blas/lapack
build" in PETSc 3.1 to "requires a tricky blas/lapack build and a
couple edits in PETSc config python scripts" in PETSc 3.2 to "requires
a tricky blas/lapack build, several edits in PETSc config python
scripts, and more edits then I've been able to successfully identify
in PETSc source code" in PETSc 3.3. So quad precision is now the
*only* extended precision option available when compiling against
current PETSc.
---
Roy
On Mon, 25 Jun 2012, Derek Gaston wrote:
We're definitely interested in trying quadruple precision as well... we can
definitely help test some of this if you send in any
patches...
Derek
On Mon, Jun 25, 2012 at 6:25 PM, Roy Stogner <[email protected]> wrote:
On Mon, 25 Jun 2012, Sylvain Vallaghe wrote:
> I'm trying to compile libmesh with quadruple precision. So far I
> compiled PETSC with float128, but the compilation of libmesh crashes
> right away. Is there something special to do in order to compile
> libmesh with quad precision ?
Sadly, the first thing to do is "add quad precision support to
libMesh". I know I put some of the infrastructure in there on a lark,
and it shouldn't be a big step up from the single/double/"triple"
precision independence which is relatively well tested, but IIRC there
was still work to be done.
If you want to help us with that work, I'd be happy to continue it.
To start I'd want to know what version of PETSc are you using, what
configuration commands you used for PETSc and libMesh, and what
compilation errors you hit for libMesh, so I can see if I can
replicate the problem.
---
Roy
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