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LAPACK dll
From: |
pkienzle |
Subject: |
LAPACK dll |
Date: |
Mon, 17 Nov 2003 02:38:26 -0000 |
Hi,
I've been trying to put together a Windows version of
Octave with an lapack DLL so that we only need to
provide atlas-enhanced replacements for lapack.dll
instead of the entire libcruft.dll.
I have run into a snag --- octave wants to override xerbla
at runtime, but windows wants to statically link it into
the DLL, or at least it wants a DLL containing xerbla
that it can link to.
Is there a way to override xerbla at runtime?
What I'm doing currently is replacing xerbla with
one which calls privstop instead of stop, where
privstop() is a C function which calls (*stopfn)().
stopfn is defined by a call to stopblas(xstopx). This
should work (I haven't rebuilt octave yet), but it means
I need to convince octave to call stopblas(xstopx) on
windows.
There are two things I don't like about this solution:
1) The octave specific hack to lapack --- I want a
unified lapack useable by all the windows scientific
packages so that we can share the work of building
the optimized versions. Any idea how R/Matlab/Scilab,
etc. address this problem? Or do the just assume
that xerbla is never invoked?
2) The windows specific hack to octave. That's minor
enough that I can get over it, but it is inelegant at best.
I'm attaching the build code and support functions
for mklapackdll.sh for the curious. I had to hack
around a few more things to avoid loading the libg2c
I/O functions.
Thanks in advance,
Paul Kienzle
address@hidden
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